Move Material to new module && TriangleBVH intersect && Seperate light and material

ray-tracing-scene/src/basic_scene.rs

@@ -1,7 +1,7 @@
 use rand::Rng;
-use ray_tracing_core::material::DefaultMaterial;
 use ray_tracing_core::prelude::*;
 use ray_tracing_core::scene::{Intersection, Scene};
+use ray_tracing_material::default::DefaultMaterial;
 
 pub struct BasicScene {
     pub(crate) spheres: Vec<(Pos3, Float)>,
@@ -30,7 +30,8 @@ impl<R: Rng> Scene<R> for BasicScene {
                 let int = Intersection::new(
                     d,
                     ((ray.start() + d * ray.dir()) - c).normalize(),
-                    &DefaultMaterial {},
+                    Some(&DefaultMaterial {}),
+                    None,
                 );
                 if d >= min && d <= max {
                     if let Some(i) = intersection.as_ref() {