bevy_rapier2d/geometry/shape_views/
triangle.rs

1use crate::math::{Real, Vect};
2use rapier::parry::shape::Triangle;
3
4/// Read-only access to the properties of a triangle.
5#[derive(Copy, Clone)]
6pub struct TriangleView<'a> {
7    /// The raw shape from Rapier.
8    pub raw: &'a Triangle,
9}
10
11macro_rules! impl_ref_methods(
12    ($View: ident) => {
13        impl<'a> $View<'a> {
14            /// The triangle first point.
15            pub fn a(&self) -> Vect {
16                self.raw.a.into()
17            }
18
19            /// The triangle second point.
20            pub fn b(&self) -> Vect {
21                self.raw.b.into()
22            }
23
24            /// The triangle third point.
25            pub fn c(&self) -> Vect {
26                self.raw.c.into()
27            }
28
29            /// Reference to an array containing the three vertices of this triangle.
30            #[inline]
31            pub fn vertices(&self) -> [Vect; 3] {
32                let vtx = self.raw.vertices();
33                [vtx[0].into(), vtx[1].into(), vtx[2].into()]
34            }
35
36            /// The normal of this triangle assuming it is oriented ccw.
37            ///
38            /// The normal points such that it is collinear to `AB × AC` (where `×` denotes the cross
39            /// product).
40            #[cfg(feature = "dim3")]
41            #[inline]
42            pub fn normal(&self) -> Option<Vect> {
43                self.raw.normal().map(|n| (*n).into())
44            }
45
46            /// A vector normal of this triangle.
47            ///
48            /// The vector points such that it is collinear to `AB × AC` (where `×` denotes the cross
49            /// product).
50            #[cfg(feature = "dim3")]
51            #[inline]
52            pub fn scaled_normal(&self) -> Vect {
53                self.raw.scaled_normal().into()
54            }
55
56            /// The area of this triangle.
57            #[inline]
58            pub fn area(&self) -> Real {
59                self.raw.area()
60            }
61
62            /// The geometric center of this triangle.
63            #[inline]
64            pub fn center(&self) -> Vect {
65                self.raw.center().into()
66            }
67
68            /// The perimeter of this triangle.
69            #[inline]
70            pub fn perimeter(&self) -> Real {
71                self.raw.perimeter()
72            }
73
74            /// The circumcircle of this triangle.
75            pub fn circumcircle(&self) -> (Vect, Real) {
76                let (center, radius) = self.raw.circumcircle();
77                (center.into(), radius)
78            }
79        }
80    }
81);
82
83impl_ref_methods!(TriangleView);
84
85/// Read-write access to the properties of a triangle.
86pub struct TriangleViewMut<'a> {
87    /// The raw shape from Rapier.
88    pub raw: &'a mut Triangle,
89}
90
91impl_ref_methods!(TriangleViewMut);
92
93impl TriangleViewMut<'_> {
94    /// Set the first point of the segment.
95    pub fn set_a(&mut self, a: Vect) {
96        self.raw.a = a.into();
97    }
98
99    /// Set the second point of the segment.
100    pub fn set_b(&mut self, b: Vect) {
101        self.raw.b = b.into();
102    }
103
104    /// Set the third point of the segment.
105    pub fn set_c(&mut self, c: Vect) {
106        self.raw.c = c.into();
107    }
108}
bevy_rapier2d/geometry/shape_views/triangle.rs

bevy_rapier2d/geometry/shape_views/
triangle.rs
