Add MVP projection passed through push constant

vert.glsl

@@ -1,11 +1,17 @@
 #version 450
 
-layout(location = 0) in vec2 position;
+layout(location = 0) in vec2 pos;
 layout(location = 1) in vec3 colour;
 
 layout(location = 0) out vec3 frag_colour;
 
+layout(push_constant) uniform MVP {
+	mat4 model;
+	mat4 view;
+	mat4 proj;
+} mvp;
+
 void main() {
-	gl_Position = vec4(position, 0.0, 1.0);
+	gl_Position = mvp.proj * mvp.view * mvp.model * vec4(pos, 0.0, 1.0);
 	frag_colour = colour;
 }