rust/landgen/src/outline_template_based/template_based.rs
author unC0Rr
Wed, 18 Sep 2024 13:42:26 +0200
branchtransitional_engine
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permissions -rw-r--r--
Add templates for different maze styles
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use super::{outline::OutlinePoints, outline_template::OutlineTemplate};
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use crate::{LandGenerationParameters, LandGenerator};
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use land2d::Land2D;
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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 + Default, 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 do_invert = self.outline_template.is_negative
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            && (!self.outline_template.can_invert || random_numbers.next().unwrap() & 1 == 0);
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        let (basic, zero) = if do_invert {
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            (parameters.zero, parameters.basic)
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        } else {
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            (parameters.basic, parameters.zero)
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        };
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        let mut land = Land2D::new(&self.outline_template.size, 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().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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            let distortion_limiting_factor = 100 + random_numbers.next().unwrap() % 8 * 10;
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            points.distort(parameters.distance_divisor, distortion_limiting_factor, 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, zero);
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        for p in &points.fill_points {
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            land.fill(*p, zero, zero)
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        }
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        points.draw(&mut land, basic);
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        land
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    }
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}