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/*
* Copyright 2011, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Contributor:
* Jeroen Bakker
* Monique Dewanchand
*/
#include "COM_LensGlowImageOperation.h"
#include "BLI_math.h"
LensGlowImageOperation::LensGlowImageOperation(): NodeOperation() {
this->addOutputSocket(COM_DT_COLOR);
}
void LensGlowImageOperation::initExecution() {
this->scale = 1/20000.0f;
}
void LensGlowImageOperation::executePixel(float* color, float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[]) {
const float cs_r = 1.f, cs_g = 1.f, cs_b = 1.f;
const float v = 2.f*(y / (float)512.0f) - 1.f;
const float u = 2.f*(x / (float)512.0f) - 1.f;
const float r = (u*u + v*v)*scale;
const float d = -sqrtf(sqrtf(sqrtf(r)))*9.f;
const float w = (0.5f + 0.5f*cos((double)u*M_PI))*(0.5f + 0.5f*cos((double)v*M_PI));
color[0] = expf(d*cs_r) * w;
color[1] = expf(d*cs_g) * w;
color[2] = expf(d*cs_b) * w;
color[3] = 1.0f;
}
void LensGlowImageOperation::deinitExecution() {
}
void LensGlowImageOperation::determineResolution(unsigned int resolution[], unsigned int preferredResolution[]) {
resolution[0] = 512;
resolution[1] = 512;
}
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