// InfLight Specular
							else if(light_iterator->getType() == "infLight"){
								Vector3D l = Vector3D::normalise(light_iterator->getLdVector());
								double cosAlpha = n.x * l.x + n.y * l.y + n.z * l.z;
								if(cosAlpha > 0){
									Vector3D r = Vector3D::normalise(2* cosAlpha * n - l);
									Vector3D p_eye = -Vector3D::vector(x_3d, y_3d, z_3d);
									p_eye.normalise();
									double cosBeta = r.x * p_eye.x + r.y * p_eye.y + r.z * p_eye.z;
									if(cosBeta > 0){
										double reflection_factor = pow(cosBeta, reflectionCoeff);
										specRed += specularReflection.red * light_iterator->specularLight.red * reflection_factor;
										specGreen += specularReflection.green * light_iterator->specularLight.green * reflection_factor;
										specBlue += specularReflection.blue * light_iterator->specularLight.blue * reflection_factor;
									}
								}
							}