63 lines
1.5 KiB
Rust
63 lines
1.5 KiB
Rust
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#[derive(Debug,Clone,Copy,Hash,Eq,PartialEq)]
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pub enum AabbFace{
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Right,//+X
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Top,
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Back,
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Left,
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Bottom,
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Front,
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}
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#[derive(Clone)]
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pub struct Aabb {
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pub min: glam::Vec3,
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pub max: glam::Vec3,
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}
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impl Aabb {
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const VERTEX_DATA: [glam::Vec3; 8] = [
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glam::vec3(1., -1., -1.),
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glam::vec3(1., 1., -1.),
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glam::vec3(1., 1., 1.),
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glam::vec3(1., -1., 1.),
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glam::vec3(-1., -1., 1.),
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glam::vec3(-1., 1., 1.),
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glam::vec3(-1., 1., -1.),
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glam::vec3(-1., -1., -1.),
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];
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pub fn new() -> Self {
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Self {min: glam::Vec3::INFINITY,max: glam::Vec3::NEG_INFINITY}
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}
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pub fn grow(&mut self, point:glam::Vec3){
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self.min=self.min.min(point);
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self.max=self.max.max(point);
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}
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pub fn normal(face:AabbFace) -> glam::Vec3 {
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match face {
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AabbFace::Right => glam::vec3(1.,0.,0.),
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AabbFace::Top => glam::vec3(0.,1.,0.),
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AabbFace::Back => glam::vec3(0.,0.,1.),
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AabbFace::Left => glam::vec3(-1.,0.,0.),
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AabbFace::Bottom => glam::vec3(0.,-1.,0.),
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AabbFace::Front => glam::vec3(0.,0.,-1.),
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}
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}
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pub fn unit_vertices() -> [glam::Vec3;8] {
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return Self::VERTEX_DATA;
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}
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pub fn face(&self,face:AabbFace) -> Aabb {
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let mut aabb=self.clone();
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//in this implementation face = worldspace aabb face
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match face {
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AabbFace::Right => aabb.min.x=aabb.max.x,
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AabbFace::Top => aabb.min.y=aabb.max.y,
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AabbFace::Back => aabb.min.z=aabb.max.z,
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AabbFace::Left => aabb.max.x=aabb.min.x,
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AabbFace::Bottom => aabb.max.y=aabb.min.y,
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AabbFace::Front => aabb.max.z=aabb.min.z,
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}
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return aabb;
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}
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}
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