rust/landgen/src/template_based.rs
author alfadur
Tue, 13 Nov 2018 20:01:43 +0300
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use integral_geometry::{Point, Size};
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use land2d::Land2D;
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use crate::{
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    LandGenerationParameters,
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    LandGenerator,
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    outline::OutlinePoints,
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    outline_template::OutlineTemplate
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};
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pub struct TemplatedLandGenerator {
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    outline_template: OutlineTemplate,
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}
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impl TemplatedLandGenerator {
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    pub fn new(outline_template: OutlineTemplate) -> Self {
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        Self { outline_template }
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    }
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}
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impl LandGenerator for TemplatedLandGenerator {
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    fn generate_land<T: Copy + PartialEq, I: Iterator<Item = u32>>(
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        &self,
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        parameters: &LandGenerationParameters<T>,
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        random_numbers: &mut I,
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    ) -> Land2D<T> {
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        let mut land = Land2D::new(self.outline_template.size, parameters.basic);
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        let mut points = OutlinePoints::from_outline_template(
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            &self.outline_template,
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            land.play_box(),
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            land.size(),
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            random_numbers,
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        );
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        // mirror
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        if self.outline_template.can_mirror {
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            if let Some(b) = random_numbers.next() {
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                if b & 1 != 0 {
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                    points.mirror();
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                }
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            }
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        }
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        // flip
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        if self.outline_template.can_flip {
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            if let Some(b) = random_numbers.next() {
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                if b & 1 != 0 {
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                    points.flip();
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                }
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            }
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        }
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        if !parameters.skip_distort {
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            points.distort(parameters.distance_divisor, random_numbers);
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        }
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        if !parameters.skip_bezier {
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            points.bezierize(5);
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        }
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        points.draw(&mut land, parameters.zero);
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        for p in &points.fill_points {
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            land.fill(*p, parameters.zero, parameters.zero)
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        }
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        points.draw(&mut land, parameters.basic);
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        land
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    }
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}