in vec3 coord3d;
in vec3 v_color;
uniform mat4 mvp;
out vec3 f_color;

void main(void) {
  if(gl_InstanceID == 0){ // Right hand version
  	gl_Position = mvp * vec4(coord3d + vec3(2, 0, 0), 1.0);
  } else {
  	gl_Position = mvp * vec4(coord3d + vec3(-2, 0, 0), 1.0);
  }
  f_color = v_color;
}