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/*
* 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 "node_color.h"
#include "stdcycles.h"
shader node_hsv(float Hue = 0.5,
float Saturation = 1.0,
float Value = 1.0,
float Fac = 0.5,
color ColorIn = 0.0,
output color ColorOut = 0.0)
{
color Color = rgb_to_hsv(ColorIn);
// remember: fmod doesn't work for negative numbers
Color[0] = fmod(Color[0] + Hue + 0.5, 1.0);
Color[1] = clamp(Color[1] * Saturation, 0.0, 1.0);
Color[2] *= Value;
Color = hsv_to_rgb(Color);
// Clamp color to prevent negative values cauzed by oversaturation.
Color[0] = max(Color[0], 0.0);
Color[1] = max(Color[1], 0.0);
Color[2] = max(Color[2], 0.0);
ColorOut = mix(ColorIn, Color, Fac);
}
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