UniformSampleGenerator.cpp

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/**<!-------------------------------------------------------------------->
   @file   UniformSampleGenerator.h
   @author Travis Fischer (fisch0920@gmail.com)
   @date   Fall 2008
   
   @brief
      Uniform point sample generation over the unit interval, where samples 
   are generated uniformly in a grid over the entire domain
   <!-------------------------------------------------------------------->**/

#include "UniformSampleGenerator.h"
#include <QtCore>

template <class SG>
void UniformSG<SG>::generate(PointSampleList &outSamples, 
                             const Viewport &domain)
{
   const unsigned width   = domain.getWidth();
   const unsigned height  = domain.getHeight();
   
   const real_t binWidth  = domain.getInvWidth();
   const real_t binHeight = domain.getInvHeight();
   
   const real_t binWidthDiv2  = binWidth  * 0.5;
   const real_t binHeightDiv2 = binHeight * 0.5;
   
   for(unsigned i = 0; i < height; ++i) {
      for(unsigned j = 0; j < width; ++j) {
         const real_t x = binWidthDiv2  + j * binWidth;
         const real_t y = binHeightDiv2 + i * binHeight;
         
         SG::_addSample(PointSample(x, y), outSamples);
      }
   }
}

// force explicit template specialization of UniformSampleGenerator and 
// UniformSampleGeneratorThread
#include <generators.h>
DECLARE_SAMPLE_GENERATOR(Uniform);