shape_core/elements/polygons/
regular.rs

1use super::*;
2
3impl<T> RegularPolygon<T>
4where
5    T: Real,
6{
7    pub fn unit(sides: usize) -> Self {
8        Self { sides, center: Point { x: T::zero(), y: T::zero() }, radius: T::one(), rotate: T::zero() }
9    }
10    pub fn new<P>(sides: usize, center: P, radius: T, rotate: T) -> Self
11    where
12        Point<T>: From<P>,
13    {
14        Self { sides, center: center.into(), radius, rotate }
15    }
16
17    pub fn vertexes(&self) -> Vec<Point<T>> {
18        let mut out = Vec::with_capacity(self.sides);
19        for i in 0..self.sides {
20            let mut vertex = self.original_vertexes(i);
21            vertex.rotate(&self.rotate);
22            vertex.translate(&self.center.x, &self.center.y);
23            out.push(vertex)
24        }
25        out
26    }
27    fn original_vertexes(&self, _index: usize) -> Point<T> {
28        todo!()
29    }
30    pub fn height(&self) -> T {
31        todo!()
32    }
33    pub fn perimeter(&self) -> T {
34        self.side_length() * T::from(self.sides).unwrap()
35    }
36    // central angle
37    pub fn central_angle(&self) -> T {
38        todo!()
39    }
40    // perimeter
41    pub fn side_length(&self) -> T {
42        todo!()
43    }
44    // n r^2 tan t / 2
45    pub fn area(&self) -> T {
46        T::from(self.sides).unwrap() * self.radius.powi(2) * self.central_angle().tan() / two()
47    }
48}
49
50impl<T> Projective<T> for RegularPolygon<T>
51where
52    T: Real + AddAssign,
53{
54    #[track_caller]
55    #[allow(unused_variables)]
56    fn transform(&mut self, matrix: &[&T; 9]) {
57        panic!("Can't keep shape after projective transform");
58    }
59    fn translate(&mut self, x: &T, y: &T) {
60        self.center.x += *x;
61        self.center.y += *y;
62    }
63    fn rotate(&mut self, angle: &T) {
64        self.rotate += *angle
65    }
66}
shape_core/elements/polygons/regular.rs

shape_core/elements/polygons/
regular.rs
