#version 410 core

layout(triangles, invocations = 1) in;
layout(line_strip, max_vertices = 4) out;


void main(void)
{
	gl_Position = gl_in[0].gl_Position;
	EmitVertex();	
	gl_Position = gl_in[1].gl_Position;
	EmitVertex();
	gl_Position = gl_in[2].gl_Position;
	EmitVertex();

	EndPrimitive();
}