Bug Fix and Optimisation

Release 0.12.13

General fixes and improvement

• Rearrange GLAD build target file structure so it matches the default file structure downloaded via GLAD web generator. You may need to clean and re-compile the entire build tree.
• Replace all uses of std::reduce with std::accumulate for the following class because it is not neccessary to use so when std::execution is not used, also some compilers have yet support this function:
  • STPSingleHistogramFilter
  • STPCascadedShadowMap
  • STPGaussianFilter

Chunk coordinate

Re-specification of chunk coordinate system. Chunks are now located using an integer vector of chunk coordinate in world position, the chunk coordinate will be a multiple of chunk size.

The benefit of using integer values effectively avoids floating point errors when looking up chunks in the hash table using chunk coordinate as key.

Terrain erosion

• Make get erosion brush function in STPRainDropSetting returns pointer to const value, was pointer to value.
• Improve erosion implementation in general.
• Potentially resolve #39 and fix a race condition in the random number generator by assigning a different RNG to each generation invocation and pool the RNG.