DissolveSampleGenerator.h

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/**<!-------------------------------------------------------------------->
   @class  DissolveSampleGenerator
   @author Travis Fischer (fisch0920@gmail.com)
   @date   Fall 2008
   
   @brief
      Cool dissolve effect which generates point samples uniformly over a 
   given 2D domain. The order in which the samples are generated looks random, 
   but it is actually quite deterministic and guaranteed to "visit" every 
   bucket in the domain.
   <!-------------------------------------------------------------------->**/

#ifndef DISSOLVE_SAMPLE_GENERATOR_H_
#define DISSOLVE_SAMPLE_GENERATOR_H_

#include <renderers/generators/SampleGenerator.h>

template <class SG>
class DissolveSG : public SG {
   
   public:
      ///@name Main usage interface
      //@{-----------------------------------------------------------------
      
      virtual void generate(PointSampleList &outSamples, 
                            const Viewport &viewport);
      
      
      //@}-----------------------------------------------------------------
      
   protected:
      inline unsigned _getBitWidth(unsigned n) {
         unsigned width = 0;
         
         while(n) {
            n >>= 1;
            ++width;
         }
         
         return width;
      }
};

#endif // DISSOLVE_SAMPLE_GENERATOR_H_