Use correct normal matrix

roadmap.md

@@ -58,3 +58,19 @@ I'm a bit happier with the system now, I think it's time I started the lighting.
 We're going to use a pretty basic Phong lighting system, with 
 Flat and Garourd shaders available (This was all that was available on the PSX!)
 
+## Bump in the road (1/23/21)
+Not sure where to go next. I changed to using OBJ files for meshes, which I might need 
+to revert (shitty animation support). There are a number of systems I want to add next
+- GUI (dearimgui or Nuklear) (Maybe expose a raw opengl context for these?)
+- Physics engine (Bullet)
+- Animation system
+- General code cleanup
+- Scene editor
+- Rest of lighting engine (point lights, spotlights)
+- Audio engine
+
+## Physics
+Yeah sure let's do physics
+- [ ] Static, Kinematic and Rigidbodies
+- [ ] Collision areas
+- [ ] Ray tracing

shaders/flat.vert

@@ -46,8 +46,7 @@ void main() {
 
   UV = uv;
 
-  vec3 my_normal = (VIEW * MODEL * vec4(normal, 0.0)).xyz;
+  vec3 my_normal = (VIEW * mat4(NORMAL) * vec4(normal, 0.0)).xyz;
-  my_normal *= NORMAL;
 
   // Flat shading, we compute light per vertex
   AMBIENT = directionalLight.ambient * directionalLight.color * material.ambient;