91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
/*
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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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* Contributor:
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* Dalai Felinto
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*/
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#include "COM_DistanceMatteOperation.h"
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#include "BLI_math.h"
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DistanceMatteOperation::DistanceMatteOperation(): NodeOperation()
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{
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addInputSocket(COM_DT_COLOR);
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addInputSocket(COM_DT_COLOR);
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addOutputSocket(COM_DT_VALUE);
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inputImageProgram = NULL;
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inputKeyProgram = NULL;
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}
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void DistanceMatteOperation::initExecution()
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{
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this->inputImageProgram = this->getInputSocketReader(0);
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this->inputKeyProgram = this->getInputSocketReader(1);
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}
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void DistanceMatteOperation::deinitExecution()
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{
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this->inputImageProgram = NULL;
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this->inputKeyProgram = NULL;
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}
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void DistanceMatteOperation::executePixel(float *outputValue, float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[])
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{
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float inKey[4];
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float inImage[4];
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const float tolerence=this->settings->t1;
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const float falloff=this->settings->t2;
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float distance;
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float alpha;
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this->inputKeyProgram->read(inKey, x, y, sampler, inputBuffers);
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this->inputImageProgram->read(inImage, x, y, sampler, inputBuffers);
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distance = sqrt(pow((inKey[0]-inImage[0]),2)+
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pow((inKey[1]-inImage[1]),2)+
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pow((inKey[2]-inImage[2]),2));
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/* store matte(alpha) value in [0] to go with
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* COM_SetAlphaOperation and the Value output
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*/
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/*make 100% transparent */
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if (distance < tolerence) {
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outputValue[0]=0.f;
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}
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/*in the falloff region, make partially transparent */
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else if (distance < falloff+tolerence) {
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distance=distance-tolerence;
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alpha=distance/falloff;
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/*only change if more transparent than before */
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if (alpha < inImage[3]) {
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outputValue[0]=alpha;
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}
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else { /* leave as before */
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outputValue[0]=inImage[3];
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}
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}
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else {
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/* leave as before */
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outputValue[0]=inImage[3];
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}
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}
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