Have the original lighting system back and a little lightbulb model to show where the light is.

33-shadow-mapping/shaders/33-shadows.vert.glsl

@@ -0,0 +1,4 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aNormal;
+layout (location = 2) in vec2 aTexCoords;