#version 450

layout(location = 0) out vec3 frag_normal;
layout(location = 1) out vec4 light_pos;

layout(push_constant) uniform vps_t {
	mat4 vp;
	mat4 light_vp;
} vps;

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

void main() {
	const vec2 pos = 4 * vertices[gl_VertexIndex];
	const vec4 world_pos = vec4(pos.x, 0, pos.y, 1);
	gl_Position = vps.vp * world_pos;
	frag_normal = vec3(0, 1, 0);
	light_pos = vps.light_vp * world_pos;
}