graphics_shapes/intersection/
circle.rs

1use crate::intersection::shared::{
2    ellipse_circle, line_circle, polygon_circle, rect_circle, triangle_circle,
3};
4use crate::prelude::*;
5
6impl IntersectsShape for Circle {
7    fn intersects_rect(&self, rect: &Rect) -> bool {
8        rect_circle(rect, self)
9    }
10
11    fn intersects_circle(&self, circle: &Circle) -> bool {
12        let max = circle.radius().max(self.radius());
13        let dist = circle.center().distance(self.center());
14        dist <= max
15    }
16
17    fn intersects_line(&self, line: &Line) -> bool {
18        line_circle(line, self)
19    }
20
21    fn intersects_triangle(&self, triangle: &Triangle) -> bool {
22        triangle_circle(triangle, self)
23    }
24
25    fn intersects_ellipse(&self, ellipse: &Ellipse) -> bool {
26        ellipse_circle(ellipse, self)
27    }
28
29    fn intersects_polygon(&self, polygon: &Polygon) -> bool {
30        polygon_circle(polygon, self)
31    }
32}
33
34#[cfg(test)]
35mod test {
36    use crate::prelude::*;
37
38    #[test]
39    fn lines_all_directions() {
40        let line_tl = Line::new((0, 0), (20, 20));
41        let line_br = Line::new((20, 20), (0, 0));
42        let line_bl = Line::new((0, 20), (20, 0));
43        let line_tr = Line::new((20, 0), (0, 20));
44        let circle = Circle::new((10, 10), 4);
45
46        assert!(circle.intersects_line(&line_tl));
47        assert!(circle.intersects_line(&line_tr));
48        assert!(circle.intersects_line(&line_bl));
49        assert!(circle.intersects_line(&line_br));
50    }
51
52    #[test]
53    fn poly_part() {
54        let line = Line::new((128, 126), (50, 204));
55        let circle = Circle::new((113, 135), 15);
56
57        assert!(circle.intersects_line(&line));
58    }
59}
graphics_shapes/intersection/circle.rs

graphics_shapes/intersection/
circle.rs
