blender/intern/cycles/kernel/shaders/node_blackbody.osl

/*
 * Copyright 2011-2013 Blender Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License
 */

#include "stdosl.h"

shader node_blackbody(
	float Temperature = 1200.0,
	output color Color = 0.0)
{
	color rgb = blackbody(Temperature);
	
	/* Scale by luminance */
	float l = luminance(rgb);
	if (l != 0.0)
		rgb /= l;
	Color = rgb;
}