parry3d/query/point/
point_ball.rs1use na::{self, ComplexField};
2
3use crate::math::{Point, Real};
4use crate::query::{PointProjection, PointQuery};
5use crate::shape::{Ball, FeatureId};
6
7impl PointQuery for Ball {
8 #[inline]
9 fn project_local_point(&self, pt: &Point<Real>, solid: bool) -> PointProjection {
10 let distance_squared = pt.coords.norm_squared();
11
12 let inside = distance_squared <= self.radius * self.radius;
13
14 if inside && solid {
15 PointProjection::new(true, *pt)
16 } else {
17 let proj =
18 Point::from(pt.coords * (self.radius / ComplexField::sqrt(distance_squared)));
19 PointProjection::new(inside, proj)
20 }
21 }
22
23 #[inline]
24 fn project_local_point_and_get_feature(
25 &self,
26 pt: &Point<Real>,
27 ) -> (PointProjection, FeatureId) {
28 (self.project_local_point(pt, false), FeatureId::Face(0))
29 }
30
31 #[inline]
32 fn distance_to_local_point(&self, pt: &Point<Real>, solid: bool) -> Real {
33 let dist = pt.coords.norm() - self.radius;
34
35 if solid && dist < 0.0 {
36 0.0
37 } else {
38 dist
39 }
40 }
41
42 #[inline]
43 fn contains_local_point(&self, pt: &Point<Real>) -> bool {
44 pt.coords.norm_squared() <= self.radius * self.radius
45 }
46}