#version 450

layout(location = 0) out vec3 frag_normal;

layout(push_constant) uniform vp_t {
	mat4 view;
	mat4 proj;
} vp;

vec2 vertices[4] = vec2[](
	vec2(-1, -1),
	vec2(-1, 1),
	vec2(1, 1),
	vec2(1, -1)
);

void main() {
	const vec2 pos = 3 * vertices[gl_VertexIndex];
	gl_Position = vp.proj * vp.view * vec4(pos.x, 0, pos.y, 1); 
	frag_normal = vec3(0, 1, 0);
}