feat: move light dir independently from camera

frag_lit.glsl

@@ -2,6 +2,7 @@
 
 in vec3 Normal;
 in vec3 FragPos;
+in mat4x4 ModelViewProjection;
 
 out vec4 FragColor;
 
@@ -17,7 +18,7 @@ void main()
 
     // Directional lighting
     vec3 directionalLightColor = vec3(1.0, 1.0, 1.0);
-    vec3 lightPos = vec3(10.0, 7.0, -8.0);
+    vec3 lightPos = (ModelViewProjection * vec4(6.0, -7.0, 8.0, 1.0)).xyz;
     vec3 normal = normalize(Normal);
     vec3 lightDir = normalize(lightPos - FragPos);
     float diff = max(dot(normal, lightDir), 0.0);

vert.glsl

@@ -9,11 +9,13 @@ uniform mat4x4 _Projection;
 
 out vec3 Normal;
 out vec3 FragPos;
+out mat4x4 ModelViewProjection;
 
 void main()
 {
     vec4 pos = vec4(aPos, 1.0);
     mat4x4 mvp = _Projection * _View * _Model;
+    ModelViewProjection = mvp;
 
     gl_Position = mvp * pos;
     FragPos = vec3(_Model * pos);