library: use beevee's Intersected trait

pathtracer/src/render/object.rs

@@ -4,7 +4,11 @@ use crate::material::MaterialEnum;
 use crate::shape::{Shape, ShapeEnum};
 use crate::texture::TextureEnum;
 use crate::Point;
-use beevee::aabb::{Bounded, AABB};
+use beevee::{
+    aabb::{Bounded, AABB},
+    bvh::Intersected,
+    ray::Ray,
+};
 use serde::Deserialize;
 
 /// An object being rendered in the scene.
@@ -66,6 +70,12 @@ impl Bounded for Object {
     }
 }
 
+impl Intersected for Object {
+    fn intersect(&self, ray: &Ray) -> Option<f32> {
+        self.shape.intersect(ray)
+    }
+}
+
 #[cfg(test)]
 mod test {
     use super::*;

pathtracer/src/render/scene.rs

@@ -149,9 +149,7 @@ impl Scene {
     }
 
     fn cast_ray(&self, ray: Ray) -> Option<(f32, &Object)> {
-        self.bvh
+        self.bvh.walk(&ray, &self.objects)
-            .walk(&ray, &self.objects)
-            .and_then(|o| o.shape.intersect(&ray).map(|t| (t, o)))
     }
 
     fn color_at(

pathtracer/src/shape/mod.rs

@@ -3,6 +3,7 @@
 use super::{Point, Point2D, Vector};
 use beevee::{
     aabb::{Bounded, AABB},
+    bvh::Intersected,
     ray::Ray,
 };
 use nalgebra::Unit;
@@ -44,6 +45,12 @@ impl Bounded for dyn Shape {
     }
 }
 
+impl Intersected for dyn Shape {
+    fn intersect(&self, ray: &Ray) -> Option<f32> {
+        self.intersect(ray)
+    }
+}
+
 mod sphere;
 pub use sphere::*;