commit for stack exchange

src/ray.rs

@@ -31,6 +31,8 @@ pub fn construct_primary_rays(camera: &Camera,
         panic!("Non invertible transform Matrix. giving up.")
     );
 
+    dbg!(camera.transform);
+
     //TODO: take ray multiplier per pixel into account here
     let mut rays: Vec<Ray> = Vec::with_capacity(height * width);
 
@@ -59,7 +61,7 @@ fn generate_single_primary_ray(image_width: usize,
     let direction_view_space: Vector4<f32> =
         Vector4::new(u as f32 - (image_width as f32 / 2.0),
                      v as f32 - (image_height as f32 / 2.0),
-                     -focal_length,
+                     focal_length,
                      0.0);
     //TODO: Rotation is fucked
     //x rotation has sign wrong, y and z are flipped

src/renderer.rs

@@ -75,6 +75,7 @@ fn raytrace(ray: &Ray, scene: &Scene) -> Rgba<u8> {
                     // a new closer Point is found
                     if t < smallest_t {
                         smallest_t = t;
+                        //TODO: lighting model is not at all considered. Just a debug hack.
                         clostest_intersection_point = Option::from(isec);
                         let color_vec = model.material().get_base_color_alpha(
                             Vector2::new(0.0, 0.0)