Rendering something parsed from a pbrt file

ray-tracing-core/src/affine_transform.rs

@@ -174,6 +174,14 @@ impl AffineTransform {
             self.inv[2][0] * pos.x() + self.inv[2][1] * pos.y() + self.inv[2][2] * pos.z(),
         )
     }
+
+    pub fn transform_ray(&self, ray: Ray) -> Ray {
+        Ray::new(
+            self.transform_pos(ray.start()),
+            self.transform_dir(ray.dir()),
+            ray.time(),
+        )
+    }
 }
 
 impl Mul<AffineTransform> for AffineTransform {