Run shadow render pass and compute light position in vertex shaders

default-frag.glsl

@@ -5,6 +5,8 @@ vec3 light_dir = normalize(vec3(2, 2, -1));
 vec3 base_colour = vec3(1.0, 0.94, 0.8);
 
 layout(location = 0) in vec3 frag_normal;
+layout(location = 1) in vec4 light_pos;
+
 layout(location = 0) out vec4 out_colour;
 
 void main()