layout(triangles, invocations=3) in;
layout(triangle_strip, max_vertices=6) out;
out vec4 fcolor;
in vec4 fca[];
in int gl_InvocationID;

void main(){
	if(gl_InvocationID == 0){
		gl_Position = gl_in[0].gl_Position;
		fcolor = vec4(0, .5, .4, 1);
		EmitVertex();
		gl_Position = gl_in[1].gl_Position;
		fcolor = vec4(0, .5, .4, 1);
		EmitVertex();
		gl_Position = gl_in[2].gl_Position;
		fcolor = vec4(0, .5, .4, 1);
		EmitVertex();
		EndPrimitive();
		return;
	}

	vec4 move;
	if(gl_InvocationID == 1)
		move = vec4(10, 0, 0, 0);
	else
		move = vec4(-10, 0, 0, 0);

	gl_Position = gl_in[0].gl_Position + move;
	fcolor = fca[0];
	EmitVertex();
	gl_Position = gl_in[1].gl_Position + move;
	fcolor = fca[0];
	EmitVertex();
	gl_Position = gl_in[2].gl_Position + move;
	fcolor = fca[0];
	EmitVertex();
	EndPrimitive();
}