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

void main(void) {
  if(gl_InstanceID == 0)
	  gl_Position = mvp * vec4(coord3d, 1.0);
  else if(gl_InstanceID == 1)
	  gl_Position = mvp * vec4(coord3d + vec3(-3, 0, 0), 1.0);
  else
	  gl_Position = mvp * vec4(coord3d + vec3(3, 0, 0), 1.0);
  f_color = v_color;
}