rust/integral-geometry/src/lib.rs
author Wuzzy <Wuzzy2@mail.ru>
Mon, 12 Oct 2020 01:01:28 +0200
changeset 15747 ed3c5c15dcbd
parent 15384 1c6d5656157c
child 15751 a4558e2be08c
permissions -rw-r--r--
Fix minor offset mismatch with wrapping laser
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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use fpnum::{fp, integral_sqrt, FPNum, FPPoint};
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use std::{
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    cmp::{max, min},
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    ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, RangeInclusive, Sub, SubAssign},
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};
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#[derive(PartialEq, Eq, Clone, Copy, Debug)]
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pub struct Point {
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    pub x: i32,
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    pub y: i32,
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}
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impl Point {
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    pub const ZERO: Self = Self::new(0, 0);
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    #[inline]
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    pub const fn new(x: i32, y: i32) -> Self {
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        Self { x, y }
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    }
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    #[inline]
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    pub const fn diag(v: i32) -> Self {
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        Self::new(v, v)
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    }
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    #[inline]
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    pub fn signum(self) -> Self {
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        Self::new(self.x.signum(), self.y.signum())
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    }
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    #[inline]
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    pub fn abs(self) -> Self {
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        Self::new(self.x.abs(), self.y.abs())
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    }
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    #[inline]
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    pub const fn dot(self, other: Point) -> i32 {
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        self.x * other.x + self.y * other.y
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    }
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    #[inline]
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    pub fn max_norm(self) -> i32 {
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        std::cmp::max(self.x.abs(), self.y.abs())
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    }
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    #[inline]
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    pub fn integral_norm(self) -> u32 {
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        let sqr = (self.x as u64).wrapping_pow(2) + (self.y as u64).wrapping_pow(2);
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        integral_sqrt(sqr) as u32
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    }
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    #[inline]
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    pub const fn transform(self, matrix: &[i32; 4]) -> Self {
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        Point::new(
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            matrix[0] * self.x + matrix[1] * self.y,
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            matrix[2] * self.x + matrix[3] * self.y,
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        )
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    }
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    #[inline]
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    pub const fn rotate90(self) -> Self {
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        Point::new(self.y, -self.x)
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    }
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    #[inline]
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    pub const fn cross(self, other: Point) -> i32 {
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        self.dot(other.rotate90())
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    }
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    #[inline]
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    pub fn clamp(self, rect: &Rect) -> Point {
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        Point::new(rect.x_range().clamp(self.x), rect.y_range().clamp(self.y))
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    }
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    #[inline]
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    pub const fn line_to(self, end: Point) -> Line {
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        Line::new(self, end)
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    }
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    #[inline]
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    pub const fn ray_with_dir(self, direction: Point) -> Ray {
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        Ray::new(self, direction)
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    }
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    #[inline]
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    pub const fn tangent_mul(self, x: i32) -> i32 {
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        x * self.y / self.x
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    }
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    #[inline]
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    pub const fn cotangent_mul(self, y: i32) -> i32 {
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        y * self.x / self.y
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    }
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    #[inline]
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    pub fn to_fppoint(self) -> FPPoint {
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        FPPoint::new(self.x.into(), self.y.into())
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    }
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    #[inline]
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    pub fn from_fppoint(p: &FPPoint) -> Self {
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        Self::new(p.x().round(), p.y().round())
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    }
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}
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#[derive(PartialEq, Eq, Clone, Copy, Debug)]
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pub struct Size {
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    pub width: usize,
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    pub height: usize,
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}
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impl Size {
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    pub const EMPTY: Self = Self::square(0);
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    #[inline]
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    pub const fn new(width: usize, height: usize) -> Self {
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        Self { width, height }
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    }
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    #[inline]
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    pub const fn square(size: usize) -> Self {
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        Self {
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            width: size,
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            height: size,
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        }
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    }
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    #[inline]
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    pub const fn area(&self) -> usize {
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        self.width * self.height
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    }
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    #[inline]
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    pub const fn linear_index(&self, x: usize, y: usize) -> usize {
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        y * self.width + x
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    }
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    #[inline]
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    pub fn is_power_of_two(&self) -> bool {
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        self.width.is_power_of_two() && self.height.is_power_of_two()
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    }
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    #[inline]
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    pub fn next_power_of_two(&self) -> Self {
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        Self {
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            width: self.width.next_power_of_two(),
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            height: self.height.next_power_of_two(),
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        }
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    }
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    #[inline]
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    pub const fn transpose(&self) -> Self {
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        Self::new(self.height, self.width)
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    }
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    #[inline]
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    pub fn to_mask(&self) -> SizeMask {
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        SizeMask::new(*self)
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    }
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    #[inline]
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    pub fn to_square(&self) -> Self {
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        Self::square(max(self.width, self.height))
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    }
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    pub fn to_grid_index(&self) -> GridIndex {
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        GridIndex::new(*self)
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    }
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    #[inline]
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    pub fn contains(&self, other: Self) -> bool {
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        self.width >= other.width && self.height >= other.height
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    }
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    #[inline]
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    pub fn join(&self, other: Self) -> Self {
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        Self {
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            width: max(self.width, other.width),
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            height: max(self.height, other.height)
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        }
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    }
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}
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#[derive(PartialEq, Eq, Clone, Copy, Debug)]
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pub struct SizeMask {
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    size: Size,
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}
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impl SizeMask {
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    #[inline]
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    pub fn new(size: Size) -> Self {
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        debug_assert!(size.is_power_of_two());
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        let size = Size {
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            width: !(size.width - 1),
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            height: !(size.height - 1),
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        };
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        Self { size }
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    }
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    #[inline]
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    pub fn contains_x<T: Into<usize>>(&self, x: T) -> bool {
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        (self.size.width & x.into()) == 0
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    }
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    #[inline]
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    pub fn contains_y<T: Into<usize>>(&self, y: T) -> bool {
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        (self.size.height & y.into()) == 0
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    }
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    #[inline]
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    pub fn contains(&self, point: Point) -> bool {
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        self.contains_x(point.x as usize) && self.contains_y(point.y as usize)
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    }
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}
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pub struct GridIndex {
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    shift: Point,
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}
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impl GridIndex {
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    pub fn new(size: Size) -> Self {
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        assert!(size.is_power_of_two());
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        let shift = Point::new(
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            size.width.trailing_zeros() as i32,
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            size.height.trailing_zeros() as i32,
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        );
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        Self { shift }
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    }
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    pub fn map(&self, position: Point) -> Point {
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        Point::new(position.x >> self.shift.x, position.y >> self.shift.y)
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    }
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}
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macro_rules! bin_op_impl {
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    ($op: ty, $name: tt) => {
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        impl $op for Point {
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            type Output = Self;
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            #[inline]
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            fn $name(self, rhs: Self) -> Self::Output {
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                Self::new(self.x.$name(rhs.x), self.y.$name(rhs.y))
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            }
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        }
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    };
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}
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macro_rules! scalar_bin_op_impl {
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    ($($op: tt)::+, $name: tt) => {
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        impl $($op)::+<i32> for Point {
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            type Output = Self;
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            #[inline]
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            fn $name(self, rhs: i32) -> Self::Output {
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                Self::new(self.x.$name(rhs), self.y.$name(rhs))
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            }
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        }
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    };
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}
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macro_rules! bin_assign_op_impl {
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    ($op: ty, $name: tt) => {
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        impl $op for Point {
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            #[inline]
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            fn $name(&mut self, rhs: Self) {
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                self.x.$name(rhs.x);
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                self.y.$name(rhs.y);
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            }
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        }
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    };
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}
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macro_rules! fp_scalar_bin_op_impl {
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    ($($op: tt)::+, $name: tt) => {
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        impl $($op)::+<FPNum> for Point {
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            type Output = FPPoint;
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            #[inline]
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            fn $name(self, rhs: FPNum) -> Self::Output {
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                FPPoint::new(rhs.$name(self.x), rhs.$name(self.y))
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            }
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        }
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    };
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}
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macro_rules! left_fp_scalar_bin_op_impl {
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    ($($op: tt)::+, $name: tt) => {
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        impl $($op)::+<Point> for FPNum {
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            type Output = FPPoint;
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            #[inline]
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            fn $name(self, rhs: Point) -> Self::Output {
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                FPPoint::new(self.$name(rhs.x), self.$name(rhs.y))
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            }
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        }
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    };
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}
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bin_op_impl!(Add, add);
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bin_op_impl!(Sub, sub);
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bin_op_impl!(Mul, mul);
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bin_op_impl!(Div, div);
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scalar_bin_op_impl!(Mul, mul);
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scalar_bin_op_impl!(Div, div);
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fp_scalar_bin_op_impl!(Mul, mul);
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fp_scalar_bin_op_impl!(Div, div);
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left_fp_scalar_bin_op_impl!(Mul, mul);
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left_fp_scalar_bin_op_impl!(Div, div);
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bin_assign_op_impl!(AddAssign, add_assign);
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bin_assign_op_impl!(SubAssign, sub_assign);
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bin_assign_op_impl!(MulAssign, mul_assign);
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bin_assign_op_impl!(DivAssign, div_assign);
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#[derive(PartialEq, Eq, Clone, Copy, Debug)]
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pub struct Rect {
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    top_left: Point,
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    bottom_right: Point,
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}
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impl Rect {
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    pub const EMPTY: Self = Self {
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        top_left: Point::ZERO,
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        bottom_right: Point::diag(-1),
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    };
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    #[inline]
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    pub fn new(top_left: Point, bottom_right: Point) -> Self {
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        debug_assert!(top_left.x <= bottom_right.x + 1);
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        debug_assert!(top_left.y <= bottom_right.y + 1);
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        Self {
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            top_left,
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   332
            bottom_right,
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   333
        }
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   334
    }
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   335
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   336
    pub fn from_box(left: i32, right: i32, top: i32, bottom: i32) -> Self {
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        Self::new(Point::new(left, top), Point::new(right, bottom))
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   338
    }
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   339
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   340
    pub fn from_size(top_left: Point, size: Size) -> Self {
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   341
        Self::new(
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   342
            top_left,
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   343
            top_left + Point::new(size.width as i32 - 1, size.height as i32 - 1),
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        )
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   345
    }
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   346
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   347
    pub fn from_size_coords(x: i32, y: i32, width: usize, height: usize) -> Self {
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        Self::from_size(Point::new(x, y), Size::new(width, height))
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   349
    }
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   350
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   351
    pub fn at_origin(size: Size) -> Self {
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   352
        Self::from_size(Point::ZERO, size)
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   353
    }
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   354
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   355
    #[inline]
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   356
    pub const fn width(&self) -> usize {
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   357
        (self.right() - self.left() + 1) as usize
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   358
    }
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   359
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   360
    #[inline]
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   361
    pub const fn height(&self) -> usize {
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   362
        (self.bottom() - self.top() + 1) as usize
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   363
    }
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   364
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   365
    #[inline]
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   366
    pub const fn size(&self) -> Size {
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   367
        Size::new(self.width(), self.height())
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   368
    }
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   369
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   370
    #[inline]
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   371
    pub const fn area(&self) -> usize {
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   372
        self.size().area()
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   373
    }
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   374
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   375
    #[inline]
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   376
    pub const fn left(&self) -> i32 {
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   377
        self.top_left().x
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diff changeset
   378
    }
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   379
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   380
    #[inline]
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   381
    pub const fn top(&self) -> i32 {
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   382
        self.top_left().y
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diff changeset
   383
    }
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diff changeset
   384
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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   385
    #[inline]
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2e2b31cf0871 make stuff const
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   386
    pub const fn right(&self) -> i32 {
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diff changeset
   387
        self.bottom_right().x
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diff changeset
   388
    }
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diff changeset
   389
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   390
    #[inline]
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2e2b31cf0871 make stuff const
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   391
    pub const fn bottom(&self) -> i32 {
14137
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diff changeset
   392
        self.bottom_right().y
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7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   393
    }
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   394
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   395
    #[inline]
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2e2b31cf0871 make stuff const
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diff changeset
   396
    pub const fn top_left(&self) -> Point {
14135
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diff changeset
   397
        self.top_left
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diff changeset
   398
    }
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   399
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   400
    #[inline]
14627
2e2b31cf0871 make stuff const
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diff changeset
   401
    pub const fn bottom_right(&self) -> Point {
14135
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   402
        self.bottom_right
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   403
    }
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   404
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   405
    #[inline]
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   406
    pub fn center(&self) -> Point {
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   407
        (self.top_left() + self.bottom_right()) / 2
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
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diff changeset
   408
    }
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   409
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   410
    #[inline]
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   411
    pub fn with_margin(&self, margin: i32) -> Self {
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   412
        let offset = Point::diag(margin);
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   413
        Self::new(self.top_left() + offset, self.bottom_right() - offset)
14135
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
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diff changeset
   414
    }
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   415
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   416
    #[inline]
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   417
    pub fn x_range(&self) -> RangeInclusive<i32> {
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   418
        self.left()..=self.right()
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   419
    }
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   420
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   421
    #[inline]
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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parents: 14134
diff changeset
   422
    pub fn y_range(&self) -> RangeInclusive<i32> {
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
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diff changeset
   423
        self.top()..=self.bottom()
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   424
    }
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   425
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
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diff changeset
   426
    #[inline]
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   427
    pub fn contains(&self, point: Point) -> bool {
15025
dc4a12a84c92 remove RangeContains in favor of standard contains
alfadur
parents: 14726
diff changeset
   428
        self.x_range().contains(&point.x) && self.y_range().contains(&point.y)
14135
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   429
    }
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
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diff changeset
   430
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   431
    #[inline]
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
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diff changeset
   432
    pub fn contains_inside(&self, point: Point) -> bool {
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   433
        point.x > self.left()
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
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diff changeset
   434
            && point.x < self.right()
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   435
            && point.y > self.top()
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   436
            && point.y < self.bottom()
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   437
    }
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
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diff changeset
   438
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   439
    #[inline]
14717
16024046d458 rescue the atlas
alfadur
parents: 14627
diff changeset
   440
    pub fn contains_rect(&self, other: &Self) -> bool {
16024046d458 rescue the atlas
alfadur
parents: 14627
diff changeset
   441
        self.contains(other.top_left()) && self.contains(other.bottom_right())
16024046d458 rescue the atlas
alfadur
parents: 14627
diff changeset
   442
    }
16024046d458 rescue the atlas
alfadur
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diff changeset
   443
16024046d458 rescue the atlas
alfadur
parents: 14627
diff changeset
   444
    #[inline]
14137
3119d665d3c6 collapse rectangle types back together with consistent usage of size
alfadur
parents: 14135
diff changeset
   445
    pub fn intersects(&self, other: &Rect) -> bool {
14726
75ff5c643004 actually atlas tests were also broken
alfadur
parents: 14725
diff changeset
   446
        self.left() <= other.right()
14135
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   447
            && self.right() >= other.left()
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   448
            && self.top() <= other.bottom()
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   449
            && self.bottom() >= other.top()
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   450
    }
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   451
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   452
    #[inline]
14137
3119d665d3c6 collapse rectangle types back together with consistent usage of size
alfadur
parents: 14135
diff changeset
   453
    pub fn split_at(&self, point: Point) -> [Rect; 4] {
14135
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   454
        assert!(self.contains_inside(point));
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   455
        [
14137
3119d665d3c6 collapse rectangle types back together with consistent usage of size
alfadur
parents: 14135
diff changeset
   456
            Self::from_box(self.left(), point.x, self.top(), point.y),
3119d665d3c6 collapse rectangle types back together with consistent usage of size
alfadur
parents: 14135
diff changeset
   457
            Self::from_box(point.x, self.right(), self.top(), point.y),
3119d665d3c6 collapse rectangle types back together with consistent usage of size
alfadur
parents: 14135
diff changeset
   458
            Self::from_box(point.x, self.right(), point.y, self.bottom()),
3119d665d3c6 collapse rectangle types back together with consistent usage of size
alfadur
parents: 14135
diff changeset
   459
            Self::from_box(self.left(), point.x, point.y, self.bottom()),
14135
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   460
        ]
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   461
    }
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   462
14137
3119d665d3c6 collapse rectangle types back together with consistent usage of size
alfadur
parents: 14135
diff changeset
   463
    #[inline]
14717
16024046d458 rescue the atlas
alfadur
parents: 14627
diff changeset
   464
    pub fn with_margins(&self, left: i32, right: i32, top: i32, bottom: i32) -> Self {
16024046d458 rescue the atlas
alfadur
parents: 14627
diff changeset
   465
        Self::from_box(
14725
19d30d96d7d6 fix atlas.insert
alfadur
parents: 14717
diff changeset
   466
            self.left() - left,
14717
16024046d458 rescue the atlas
alfadur
parents: 14627
diff changeset
   467
            self.right() + right,
14725
19d30d96d7d6 fix atlas.insert
alfadur
parents: 14717
diff changeset
   468
            self.top() - top,
14717
16024046d458 rescue the atlas
alfadur
parents: 14627
diff changeset
   469
            self.bottom() + bottom,
16024046d458 rescue the atlas
alfadur
parents: 14627
diff changeset
   470
        )
16024046d458 rescue the atlas
alfadur
parents: 14627
diff changeset
   471
    }
16024046d458 rescue the atlas
alfadur
parents: 14627
diff changeset
   472
16024046d458 rescue the atlas
alfadur
parents: 14627
diff changeset
   473
    #[inline]
14137
3119d665d3c6 collapse rectangle types back together with consistent usage of size
alfadur
parents: 14135
diff changeset
   474
    pub fn quotient(self, x: usize, y: usize) -> Point {
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   475
        self.top_left() + Point::new((x % self.width()) as i32, (y % self.height()) as i32)
14135
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   476
    }
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   477
}
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   478
14131
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   479
trait RangeClamp<T> {
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   480
    fn clamp(&self, value: T) -> T;
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   481
}
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   482
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   483
impl<T: Ord + Copy> RangeClamp<T> for RangeInclusive<T> {
14131
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   484
    fn clamp(&self, value: T) -> T {
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   485
        if value < *self.start() {
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   486
            *self.start()
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   487
        } else if value > *self.end() {
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   488
            *self.end()
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   489
        } else {
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   490
            value
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   491
        }
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   492
    }
14051
8a0d69c16cad Implement OutlinePoints for land generators, some ground work for template based landgen
unc0rr
parents: 13950
diff changeset
   493
}
8a0d69c16cad Implement OutlinePoints for land generators, some ground work for template based landgen
unc0rr
parents: 13950
diff changeset
   494
14094
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   495
pub struct Polygon {
14125
376a0551b00a - Add distance-divider option to land_dump
unc0rr
parents: 14124
diff changeset
   496
    vertices: Vec<Point>,
14094
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   497
}
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   498
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   499
impl Polygon {
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   500
    pub fn new(vertices: &[Point]) -> Self {
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   501
        let mut v = Vec::with_capacity(vertices.len() + 1);
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   502
        v.extend_from_slice(vertices);
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   503
        if !v.is_empty() {
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   504
            let start = v[0];
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   505
            v.push(start);
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   506
        }
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   507
        Self { vertices: v }
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   508
    }
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   509
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   510
    pub fn edges_count(&self) -> usize {
15215
13041ae61ac5 fix empty polygon iteration
alfadur
parents: 15214
diff changeset
   511
        self.vertices.len().saturating_sub(1)
14094
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   512
    }
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   513
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   514
    pub fn get_edge(&self, index: usize) -> Line {
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   515
        Line::new(self.vertices[index], self.vertices[index + 1])
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   516
    }
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   517
14124
6e0be42d0a8f polygonize OutlinePoints
alfadur
parents: 14112
diff changeset
   518
    pub fn split_edge(&mut self, edge_index: usize, vertex: Point) {
6e0be42d0a8f polygonize OutlinePoints
alfadur
parents: 14112
diff changeset
   519
        self.vertices.insert(edge_index + 1, vertex);
6e0be42d0a8f polygonize OutlinePoints
alfadur
parents: 14112
diff changeset
   520
    }
6e0be42d0a8f polygonize OutlinePoints
alfadur
parents: 14112
diff changeset
   521
6e0be42d0a8f polygonize OutlinePoints
alfadur
parents: 14112
diff changeset
   522
    pub fn iter<'a>(&'a self) -> impl Iterator<Item = &Point> + 'a {
6e0be42d0a8f polygonize OutlinePoints
alfadur
parents: 14112
diff changeset
   523
        (&self.vertices[..self.edges_count()]).iter()
6e0be42d0a8f polygonize OutlinePoints
alfadur
parents: 14112
diff changeset
   524
    }
6e0be42d0a8f polygonize OutlinePoints
alfadur
parents: 14112
diff changeset
   525
14134
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   526
    pub fn iter_mut<'a>(&'a mut self) -> impl Iterator<Item = &mut Point> + 'a {
14155
8f82d87d223f save edges_count
alfadur
parents: 14152
diff changeset
   527
        let edges_count = self.edges_count();
14134
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   528
        let start = self.vertices.as_mut_ptr();
14155
8f82d87d223f save edges_count
alfadur
parents: 14152
diff changeset
   529
        let end = unsafe { start.add(edges_count) };
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   530
        PolygonPointsIteratorMut {
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   531
            source: self,
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   532
            start,
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   533
            end,
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   534
        }
14094
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   535
    }
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   536
14134
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   537
    fn force_close(&mut self) {
14133
a65b60f36b96 fix polygons getting unclosed on mirroring
alfadur
parents: 14131
diff changeset
   538
        if !self.vertices.is_empty() {
14208
87f1054c2333 fix polygon closure
alfadur
parents: 14207
diff changeset
   539
            let edges_count = self.edges_count();
87f1054c2333 fix polygon closure
alfadur
parents: 14207
diff changeset
   540
            self.vertices[edges_count] = self.vertices[0];
14133
a65b60f36b96 fix polygons getting unclosed on mirroring
alfadur
parents: 14131
diff changeset
   541
        }
a65b60f36b96 fix polygons getting unclosed on mirroring
alfadur
parents: 14131
diff changeset
   542
    }
a65b60f36b96 fix polygons getting unclosed on mirroring
alfadur
parents: 14131
diff changeset
   543
14094
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   544
    pub fn iter_edges<'a>(&'a self) -> impl Iterator<Item = Line> + 'a {
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   545
        (&self.vertices[0..self.edges_count()])
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   546
            .iter()
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   547
            .zip(&self.vertices[1..])
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   548
            .map(|(s, e)| Line::new(*s, *e))
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   549
    }
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   550
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   551
    pub fn bezierize(&mut self, segments_number: u32) {
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   552
        fn calc_point(p1: Point, p2: Point, p3: Point) -> FPPoint {
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   553
            let diff13 = (p1 - p3).to_fppoint();
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   554
            let diff13_norm = diff13.distance();
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   555
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   556
            if diff13_norm.is_zero() {
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   557
                diff13
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   558
            } else {
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   559
                let diff12_norm = (p1 - p2).to_fppoint().distance();
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   560
                let diff23_norm = (p2 - p3).to_fppoint().distance();
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   561
                let min_distance = min(diff13_norm, min(diff12_norm, diff23_norm));
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   562
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   563
                diff13 * min_distance / diff13_norm / 3
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   564
            }
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   565
        }
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   566
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   567
        if self.vertices.len() < 4 {
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   568
            return;
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   569
        }
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   570
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   571
        let delta = fp!(1 / segments_number);
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   572
        let mut bezierized_vertices = Vec::new();
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   573
        let mut pi = 0;
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   574
        let mut i = 1;
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   575
        let mut ni = 2;
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   576
        let mut right_point = calc_point(self.vertices[pi], self.vertices[i], self.vertices[ni]);
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   577
        let mut left_point;
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   578
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   579
        pi += 1;
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   580
        while pi != 0 {
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   581
            pi = i;
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   582
            i = ni;
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   583
            ni += 1;
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   584
            if ni >= self.vertices.len() {
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   585
                ni = 0;
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   586
            }
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   587
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   588
            left_point = right_point;
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   589
            right_point = calc_point(self.vertices[pi], self.vertices[i], self.vertices[ni]);
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   590
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   591
            bezierized_vertices.extend(BezierCurveSegments::new(
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   592
                Line::new(self.vertices[pi], self.vertices[i]),
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   593
                left_point,
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   594
                -right_point,
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   595
                delta,
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   596
            ));
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   597
        }
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   598
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   599
        self.vertices = bezierized_vertices;
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   600
    }
14094
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   601
}
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   602
14134
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   603
struct PolygonPointsIteratorMut<'a> {
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   604
    source: &'a mut Polygon,
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   605
    start: *mut Point,
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   606
    end: *mut Point,
14134
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   607
}
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   608
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   609
impl<'a> Iterator for PolygonPointsIteratorMut<'a> {
14134
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   610
    type Item = &'a mut Point;
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   611
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   612
    fn next(&mut self) -> Option<<Self as Iterator>::Item> {
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   613
        if self.start == self.end {
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   614
            None
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   615
        } else {
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   616
            unsafe {
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   617
                let result = &mut *self.start;
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   618
                self.start = self.start.add(1);
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   619
                Some(result)
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   620
            }
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   621
        }
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   622
    }
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   623
}
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   624
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   625
impl<'a> Drop for PolygonPointsIteratorMut<'a> {
14134
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   626
    fn drop(&mut self) {
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   627
        self.source.force_close();
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   628
    }
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   629
}
09f62bb046ef actually there is a way to preserve mutable polygon iterator
alfadur
parents: 14133
diff changeset
   630
14094
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   631
impl From<Vec<Point>> for Polygon {
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   632
    fn from(mut v: Vec<Point>) -> Self {
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   633
        if !v.is_empty() && v[0] != v[v.len() - 1] {
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   634
            let start = v[0];
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   635
            v.push(start)
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   636
        }
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   637
        Self { vertices: v }
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   638
    }
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   639
}
d0b0d61b7d5e add polygons
alfadur
parents: 14092
diff changeset
   640
14076
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   641
#[derive(PartialEq, Eq, Clone, Copy, Debug)]
14131
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   642
pub struct Ray {
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   643
    pub start: Point,
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   644
    pub direction: Point,
14131
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   645
}
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   646
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   647
impl Ray {
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   648
    #[inline]
14627
2e2b31cf0871 make stuff const
alfadur
parents: 14208
diff changeset
   649
    pub const fn new(start: Point, direction: Point) -> Ray {
14131
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   650
        Self { start, direction }
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   651
    }
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   652
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   653
    #[inline]
14627
2e2b31cf0871 make stuff const
alfadur
parents: 14208
diff changeset
   654
    pub const fn tangent_mul(&self, x: i32) -> i32 {
14142
11202097584f fix tangents
alfadur
parents: 14141
diff changeset
   655
        self.direction.tangent_mul(x)
14131
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   656
    }
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   657
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   658
    #[inline]
14627
2e2b31cf0871 make stuff const
alfadur
parents: 14208
diff changeset
   659
    pub const fn cotangent_mul(&self, y: i32) -> i32 {
14142
11202097584f fix tangents
alfadur
parents: 14141
diff changeset
   660
        self.direction.cotangent_mul(y)
14131
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   661
    }
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   662
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   663
    #[inline]
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   664
    pub fn orientation(&self, point: Point) -> i32 {
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   665
        (point - self.start).cross(self.direction).signum()
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   666
    }
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   667
}
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   668
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   669
#[derive(PartialEq, Eq, Clone, Copy, Debug)]
14076
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   670
pub struct Line {
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   671
    pub start: Point,
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   672
    pub end: Point,
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   673
}
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   674
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   675
impl Line {
14627
2e2b31cf0871 make stuff const
alfadur
parents: 14208
diff changeset
   676
    pub const ZERO: Self = Self::new(Point::ZERO, Point::ZERO);
14076
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   677
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   678
    #[inline]
14627
2e2b31cf0871 make stuff const
alfadur
parents: 14208
diff changeset
   679
    pub const fn new(start: Point, end: Point) -> Self {
2e2b31cf0871 make stuff const
alfadur
parents: 14208
diff changeset
   680
        Self { start, end }
14076
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   681
    }
14077
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   682
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   683
    #[inline]
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   684
    pub fn center(&self) -> Point {
14088
f483f844da98 component-wise division is actually useful sometimes
alfadur
parents: 14081
diff changeset
   685
        (self.start + self.end) / 2
14077
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   686
    }
14106
5c1ce63114a5 a bit of simplification
alfadur
parents: 14096
diff changeset
   687
5c1ce63114a5 a bit of simplification
alfadur
parents: 14096
diff changeset
   688
    #[inline]
14131
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   689
    pub fn scaled_direction(&self) -> Point {
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   690
        self.end - self.start
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   691
    }
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   692
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   693
    #[inline]
14106
5c1ce63114a5 a bit of simplification
alfadur
parents: 14096
diff changeset
   694
    pub fn scaled_normal(&self) -> Point {
14131
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   695
        self.scaled_direction().rotate90()
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   696
    }
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   697
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   698
    #[inline]
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   699
    pub fn to_ray(&self) -> Ray {
c416d32764b7 organize landgen a bit more
alfadur
parents: 14126
diff changeset
   700
        Ray::new(self.start, self.scaled_direction())
14106
5c1ce63114a5 a bit of simplification
alfadur
parents: 14096
diff changeset
   701
    }
14076
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   702
}
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   703
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   704
impl IntoIterator for Line {
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   705
    type Item = Point;
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   706
    type IntoIter = LinePoints;
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   707
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   708
    fn into_iter(self) -> Self::IntoIter {
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   709
        LinePoints::new(self)
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   710
    }
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   711
}
14051
8a0d69c16cad Implement OutlinePoints for land generators, some ground work for template based landgen
unc0rr
parents: 13950
diff changeset
   712
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   713
pub struct LinePoints {
13938
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   714
    accumulator: Point,
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   715
    direction: Point,
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   716
    sign: Point,
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   717
    current: Point,
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   718
    total_steps: i32,
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   719
    step: i32,
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   720
}
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   721
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   722
impl LinePoints {
14076
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   723
    pub fn new(line: Line) -> Self {
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   724
        let dir = line.end - line.start;
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   725
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   726
        Self {
14627
2e2b31cf0871 make stuff const
alfadur
parents: 14208
diff changeset
   727
            accumulator: Point::ZERO,
13938
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   728
            direction: dir.abs(),
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   729
            sign: dir.signum(),
14076
e5904ead4864 Introduce OutlineSegmentsIterator, some refactoring
unC0Rr
parents: 14059
diff changeset
   730
            current: line.start,
13938
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   731
            total_steps: dir.max_norm(),
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   732
            step: 0,
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   733
        }
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   734
    }
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   735
}
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   736
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   737
impl Iterator for LinePoints {
13938
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   738
    type Item = Point;
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   739
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   740
    fn next(&mut self) -> Option<Self::Item> {
13938
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   741
        if self.step <= self.total_steps {
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   742
            self.accumulator += self.direction;
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   743
13938
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   744
            if self.accumulator.x > self.total_steps {
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   745
                self.accumulator.x -= self.total_steps;
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   746
                self.current.x += self.sign.x;
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   747
            }
13938
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   748
            if self.accumulator.y > self.total_steps {
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   749
                self.accumulator.y -= self.total_steps;
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   750
                self.current.y += self.sign.y;
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   751
            }
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   752
13938
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   753
            self.step += 1;
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   754
13938
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   755
            Some(self.current)
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   756
        } else {
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   757
            None
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   758
        }
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   759
    }
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   760
}
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   761
13941
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   762
pub struct ArcPoints {
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   763
    point: Point,
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   764
    step: i32,
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   765
}
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   766
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   767
impl ArcPoints {
14627
2e2b31cf0871 make stuff const
alfadur
parents: 14208
diff changeset
   768
    pub const fn new(radius: i32) -> Self {
13941
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   769
        Self {
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   770
            point: Point::new(0, radius),
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   771
            step: 3 - 2 * radius,
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   772
        }
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   773
    }
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   774
}
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   775
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   776
impl Iterator for ArcPoints {
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   777
    type Item = Point;
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   778
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   779
    fn next(&mut self) -> Option<Self::Item> {
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   780
        if self.point.x < self.point.y {
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   781
            let result = self.point;
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   782
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   783
            if self.step < 0 {
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   784
                self.step += self.point.x * 4 + 6;
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   785
            } else {
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   786
                self.step += (self.point.x - self.point.y) * 4 + 10;
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   787
                self.point.y -= 1;
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   788
            }
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   789
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   790
            self.point.x += 1;
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   791
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   792
            Some(result)
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   793
        } else if self.point.x == self.point.y {
13947
85645992bc8a Fix ArcPoints never finishing
unc0rr
parents: 13943
diff changeset
   794
            self.point.x += 1;
13950
48796bef9e69 Add --protocol option to engine
unc0rr
parents: 13947
diff changeset
   795
13941
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   796
            Some(self.point)
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   797
        } else {
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   798
            None
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   799
        }
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   800
    }
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   801
}
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   802
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   803
pub struct EquidistantPoints {
15182
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   804
    vector: Vec<Point>,
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   805
}
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   806
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   807
impl EquidistantPoints {
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   808
    pub fn new(vector: Point) -> Self {
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   809
        Self {
15182
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   810
            vector: if vector.x == vector.y {
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   811
                vec![
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   812
                    Point::new(vector.x, vector.x),
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   813
                    Point::new(vector.x, -vector.x),
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   814
                    Point::new(-vector.x, -vector.x),
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   815
                    Point::new(-vector.x, vector.x),
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   816
                ]
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   817
            } else {
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   818
                vec![
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   819
                    Point::new(vector.x, vector.y),
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   820
                    Point::new(vector.x, -vector.y),
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   821
                    Point::new(-vector.x, -vector.y),
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   822
                    Point::new(-vector.x, vector.y),
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   823
                    Point::new(vector.y, vector.x),
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   824
                    Point::new(vector.y, -vector.x),
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   825
                    Point::new(-vector.y, -vector.x),
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   826
                    Point::new(-vector.y, vector.x),
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   827
                ]
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   828
            },
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   829
        }
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   830
    }
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   831
}
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   832
15182
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   833
impl IntoIterator for EquidistantPoints {
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   834
    type Item = Point;
15182
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   835
    type IntoIter = std::vec::IntoIter<Point>;
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   836
15182
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   837
    fn into_iter(self) -> Self::IntoIter {
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   838
        self.vector.into_iter()
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   839
    }
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   840
}
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   841
14139
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   842
pub struct BezierCurveSegments {
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   843
    segment: Line,
14146
4791c9a7d5e8 add more point operators
alfadur
parents: 14144
diff changeset
   844
    control_point1: FPPoint,
4791c9a7d5e8 add more point operators
alfadur
parents: 14144
diff changeset
   845
    control_point2: FPPoint,
14139
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   846
    offset: FPNum,
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   847
    max_offset: FPNum,
14139
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   848
    delta: FPNum,
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   849
    have_finished: bool,
14139
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   850
}
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   851
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   852
impl BezierCurveSegments {
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   853
    pub fn new(segment: Line, p1: FPPoint, p2: FPPoint, delta: FPNum) -> Self {
14139
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   854
        Self {
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   855
            segment,
14146
4791c9a7d5e8 add more point operators
alfadur
parents: 14144
diff changeset
   856
            control_point1: segment.start.to_fppoint() - p1,
4791c9a7d5e8 add more point operators
alfadur
parents: 14144
diff changeset
   857
            control_point2: segment.end.to_fppoint() - p2,
14139
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   858
            offset: fp!(0),
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   859
            max_offset: fp!(4095 / 4096),
14139
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   860
            delta,
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   861
            have_finished: false,
14139
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   862
        }
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   863
    }
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   864
}
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   865
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   866
impl Iterator for BezierCurveSegments {
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   867
    type Item = Point;
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   868
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   869
    fn next(&mut self) -> Option<Self::Item> {
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   870
        if self.offset < self.max_offset {
14139
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   871
            let offset_sq = self.offset * self.offset;
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   872
            let offset_cub = offset_sq * self.offset;
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   873
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   874
            let r1 = fp!(1) - self.offset * 3 + offset_sq * 3 - offset_cub;
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   875
            let r2 = self.offset * 3 - offset_sq * 6 + offset_cub * 3;
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   876
            let r3 = offset_sq * 3 - offset_cub * 3;
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   877
14146
4791c9a7d5e8 add more point operators
alfadur
parents: 14144
diff changeset
   878
            let p = r1 * self.segment.start
4791c9a7d5e8 add more point operators
alfadur
parents: 14144
diff changeset
   879
                + r2 * self.control_point1
4791c9a7d5e8 add more point operators
alfadur
parents: 14144
diff changeset
   880
                + r3 * self.control_point2
4791c9a7d5e8 add more point operators
alfadur
parents: 14144
diff changeset
   881
                + offset_cub * self.segment.end;
14139
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   882
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   883
            self.offset += self.delta;
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   884
14146
4791c9a7d5e8 add more point operators
alfadur
parents: 14144
diff changeset
   885
            Some(Point::from_fppoint(&p))
14140
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   886
        } else if !self.have_finished {
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   887
            self.have_finished = true;
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   888
3078123e84ea Bezierize land outline
unc0rr
parents: 14139
diff changeset
   889
            Some(self.segment.end)
14139
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   890
        } else {
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   891
            None
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   892
        }
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   893
    }
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   894
}
37c99587825d Implement BeizerCurveSegments, no tests
unc0rr
parents: 14137
diff changeset
   895
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   896
#[cfg(test)]
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   897
mod tests {
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   898
    use super::*;
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   899
13938
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   900
    fn get_points(coords: &[(i32, i32)]) -> Vec<Point> {
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   901
        coords.iter().map(|(x, y)| Point::new(*x, *y)).collect()
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   902
    }
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   903
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   904
    #[test]
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   905
    fn line_basic() {
14077
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   906
        let line: Vec<Point> = Line::new(Point::new(0, 0), Point::new(3, 3))
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   907
            .into_iter()
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   908
            .collect();
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   909
        let v = get_points(&[(0, 0), (1, 1), (2, 2), (3, 3)]);
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   910
14077
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   911
        assert_eq!(line, v);
13938
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   912
    }
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   913
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   914
    #[test]
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   915
    fn line_skewed() {
14077
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   916
        let line: Vec<Point> = Line::new(Point::new(0, 0), Point::new(5, -7))
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   917
            .into_iter()
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   918
            .collect();
13941
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   919
        let v = get_points(&[
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   920
            (0, 0),
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   921
            (1, -1),
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   922
            (2, -2),
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   923
            (2, -3),
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   924
            (3, -4),
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   925
            (4, -5),
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   926
            (4, -6),
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   927
            (5, -7),
3f69a70063a5 Implement ArcPoints iterator for circles
unc0rr
parents: 13938
diff changeset
   928
        ]);
13938
1fa905aa4cdb move point struct into integral-geometry and use it to refactor a bit
alfadur
parents: 13937
diff changeset
   929
14077
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   930
        assert_eq!(line, v);
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   931
    }
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   932
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   933
    #[test]
13943
a325ed57ebfe Don't generate unnecessary duplication in case of equal coordinates
unc0rr
parents: 13942
diff changeset
   934
    fn equidistant_full() {
15182
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   935
        let n: Vec<Point> = EquidistantPoints::new(Point::new(1, 3))
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   936
            .into_iter()
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   937
            .collect();
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   938
        let v = get_points(&[
15182
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   939
            (1, 3),
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   940
            (1, -3),
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   941
            (-1, -3),
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   942
            (-1, 3),
15182
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   943
            (3, 1),
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   944
            (3, -1),
15182
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   945
            (-3, -1),
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   946
            (-3, 1),
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   947
        ]);
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   948
14077
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   949
        assert_eq!(n, v);
13942
7e7a03e85ac4 Add EquidistantPoints iterator to help iterating over all points of circles
unc0rr
parents: 13941
diff changeset
   950
    }
13943
a325ed57ebfe Don't generate unnecessary duplication in case of equal coordinates
unc0rr
parents: 13942
diff changeset
   951
a325ed57ebfe Don't generate unnecessary duplication in case of equal coordinates
unc0rr
parents: 13942
diff changeset
   952
    #[test]
a325ed57ebfe Don't generate unnecessary duplication in case of equal coordinates
unc0rr
parents: 13942
diff changeset
   953
    fn equidistant_half() {
15182
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   954
        let n: Vec<Point> = EquidistantPoints::new(Point::new(2, 2))
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   955
            .into_iter()
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   956
            .collect();
decb2f1c682b Rework EquidistantPoints
unc0rr
parents: 15025
diff changeset
   957
        let v = get_points(&[(2, 2), (2, -2), (-2, -2), (-2, 2)]);
14077
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   958
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   959
        assert_eq!(n, v);
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   960
    }
13943
a325ed57ebfe Don't generate unnecessary duplication in case of equal coordinates
unc0rr
parents: 13942
diff changeset
   961
14077
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   962
    #[test]
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   963
    fn line() {
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   964
        let l = Line::new(Point::new(1, 1), Point::new(5, 6));
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   965
5ade484f3351 Refactor tests, add fn center() for Line
unC0Rr
parents: 14076
diff changeset
   966
        assert_eq!(l.center(), Point::new(3, 3));
13943
a325ed57ebfe Don't generate unnecessary duplication in case of equal coordinates
unc0rr
parents: 13942
diff changeset
   967
    }
14078
bf40b5f938b0 - Add methods to work with Rect as box
unC0Rr
parents: 14077
diff changeset
   968
bf40b5f938b0 - Add methods to work with Rect as box
unC0Rr
parents: 14077
diff changeset
   969
    #[test]
bf40b5f938b0 - Add methods to work with Rect as box
unC0Rr
parents: 14077
diff changeset
   970
    fn rect() {
14137
3119d665d3c6 collapse rectangle types back together with consistent usage of size
alfadur
parents: 14135
diff changeset
   971
        let r = Rect::from_box(10, 100, 0, 70);
14078
bf40b5f938b0 - Add methods to work with Rect as box
unC0Rr
parents: 14077
diff changeset
   972
14081
5d42204ac35e Start convertion of FindPoint()
unC0Rr
parents: 14078
diff changeset
   973
        assert!(r.contains_inside(Point::new(99, 69)));
5d42204ac35e Start convertion of FindPoint()
unC0Rr
parents: 14078
diff changeset
   974
        assert!(!r.contains_inside(Point::new(100, 70)));
5d42204ac35e Start convertion of FindPoint()
unC0Rr
parents: 14078
diff changeset
   975
14078
bf40b5f938b0 - Add methods to work with Rect as box
unC0Rr
parents: 14077
diff changeset
   976
        assert_eq!(r.top_left(), Point::new(10, 0));
14137
3119d665d3c6 collapse rectangle types back together with consistent usage of size
alfadur
parents: 14135
diff changeset
   977
        assert_eq!(r.with_margin(12), Rect::from_box(22, 88, 12, 58));
14078
bf40b5f938b0 - Add methods to work with Rect as box
unC0Rr
parents: 14077
diff changeset
   978
    }
14125
376a0551b00a - Add distance-divider option to land_dump
unc0rr
parents: 14124
diff changeset
   979
376a0551b00a - Add distance-divider option to land_dump
unc0rr
parents: 14124
diff changeset
   980
    #[test]
376a0551b00a - Add distance-divider option to land_dump
unc0rr
parents: 14124
diff changeset
   981
    fn fit() {
14137
3119d665d3c6 collapse rectangle types back together with consistent usage of size
alfadur
parents: 14135
diff changeset
   982
        let r = Rect::from_box(10, 100, 0, 70);
14125
376a0551b00a - Add distance-divider option to land_dump
unc0rr
parents: 14124
diff changeset
   983
14135
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   984
        assert_eq!(Point::new(0, -10).clamp(&r), Point::new(10, 0));
7f5a591e1c43 separate rectangle types based on right/bottom edge inclusivity
alfadur
parents: 14134
diff changeset
   985
        assert_eq!(Point::new(1000, 1000).clamp(&r), Point::new(100, 70));
14125
376a0551b00a - Add distance-divider option to land_dump
unc0rr
parents: 14124
diff changeset
   986
    }
13935
75eaf7c71789 Introduce integral-geometry crate, implement LinePoints iterator
unc0rr
parents:
diff changeset
   987
}