#[set(everything)]
const constants: {
	pos0: float2;
	pos1: float2;
	pos2: float2;
	col: float4;
};

struct vert_in {
	pos: float2;
}

struct vert_out {
	pos: float4;
	col: float4;
}

fun draw_tris_vert(input: vert_in): vert_out {
	var output: vert_out;
	if (vertex_id() == 0) {
		output.pos = float4(constants.pos0, 0.0, 1.0);
	}
	else if (vertex_id() == 1) {
		output.pos = float4(constants.pos1, 0.0, 1.0);
	}
	else if (vertex_id() == 2) {
		output.pos = float4(constants.pos2, 0.0, 1.0);
	}
	output.pos.xy = output.pos.xy * 2.0 - 1.0;
	output.pos.y = -output.pos.y;
	output.col = constants.col;
	return output;
}

fun draw_tris_frag(input: vert_out): float4 {
	return input.col;
}

#[pipe]
struct pipe {
	vertex = draw_tris_vert;
	fragment = draw_tris_frag;
}