forked from bartvdbraak/blender
b4c95833ab
* Adding hue instead of removing it. fmod doesn't work as % when it comes to negative numbers: fmod( 1.3, 1) == 1.3 % 1 == 0.3 fmod(-0.3, 1) != -0.3 % 1
44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "stdosl.h"
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#include "node_color.h"
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shader node_hsv(
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float Hue = 0.5,
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float Saturation = 1.0,
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float Value = 1.0,
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float Fac = 0.5,
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color ColorIn = color(0.0, 0.0, 0.0),
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output color ColorOut = color(0.0, 0.0, 0.0))
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{
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float t = clamp(Fac, 0.0, 1.0);
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color Color = rgb_to_hsv(ColorIn);
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// remember: fmod doesn't work for negative numbers
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Color[0] += Hue + 0.5;
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Color[0] = fmod(Color[0], 1.0);
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Color[1] *= Saturation;
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Color[2] *= Value;
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Color = hsv_to_rgb(Color);
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ColorOut = mix(Color, ColorIn, t);
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}
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