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9e14e164e7
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5 Commits

Author SHA1 Message Date
Nathan Vegdahl
9e14e164e7 More improvements to Sobol sampling. 
- Added an additional scramble round to the Owen scrambling, with
  new optimized constants.
- Reordered the dimensions of the direction numbers to improve 2d
  projections between adjecent dimensions.  Only did this for
  dimensions under ~40.
 2020-03-18 12:05:42 +09:00
Nathan Vegdahl
e3152e6f9c Add alternative Sobol direction numbers to the repo. 
Also switching to one of the alternates, as it seems to give
better results than the one I was using before.
 2020-03-17 16:49:19 +09:00
Nathan Vegdahl
04a5dbff43 Generate sobol direction numbers from text file. 
This way the numbers aren't cluttering up the source file, and
this also makes it easier to play with other direction numbers.
 2020-03-17 15:21:15 +09:00
Nathan Vegdahl
420e078b70 Some cleanup of the comments in the last commit. 2020-03-15 22:37:34 +09:00
Nathan Vegdahl
047e66d9aa Reworked Sobol sampler implementation. 
This produces identical results, but generates the direction
vectors from the original sources at build time.  This makes
the source code quite a bit leaner, and will also make it easier
to play with other direction vectors in the future if the
opportunity arises.
 2020-03-15 22:01:06 +09:00