Setup Splatmap Generation

Release 0.8.5

Splatmap generator

• Move nested structure STPSplatDatabase from STPTextureFactory to STPTextureInformation and rename it to STPSplatRuleDatabase.
• Add lower_bound() function in STPKernelMath similar to the standard library version of this function.
• Setup STPTextureSplatRuleWrapper in SuperAlgorithm+Device as a helper class to access splat rules.

Setup SuperDemo+ splatmap generation

• Add STPCommonCompiler as a reusable compiler options loader. Remove compiler options setup in STPBiomefieldGenerator.
• Move all runtime-compiled scripts to Script directory in SuperDemo+ root. Rename filename suffix to .cu for consistency.
• Create STPSplatmapGenerator and setup splatmap generation routines. Also setup runtime script for device generation.

General fixes and improvement

• Add new static utility functions getChunkCoordinate(), calcChunkMapOffset() and getLocalChunkCoordinate() to retrieve chunk coordinate and map offset in STPChunk.
• Move smart memory and memory pool classes to a subdirectory Memory.
• Change the way to retrieve cudaSteam_t in STPSmartStream, instead of using implicit cast it now uses dereference operator.
  • Declared noexcept for that function.
• Change implicit cast to free-slip location to a function where() in STPFreeSlipTextureBuffer.
• Add OpenGL compatibility checking in STPEngineInitialiser.
• Replace memory block container in STPMemoryPool from std::unordered_map to a sorted array, because we expect the number of entry within the memory pool to be very small (no more than 10) and hash table is unnecessary.
• Remove unnecessary cast to uintptr_t when passing runtime compiler flags.
• Add invalid data checking during construction of STPTextureFactory and before any memory is allocated.
• Remove default value from STPPermutation so CUDA can initialise it in constant memory.
• Add some contents to README.md.

STPChunkManager

• Fix an undefined behaviour, change register flag for cudaGraphicsGLRegisterImage() from cudaGraphicsRegisterFlagsWriteDiscard to cudaGraphicsRegisterFlagsNone, because our pipeline only updates a portion of the whole texture each time rather than asking CUDA to discard the entire content.
  • A resource mapping flag cudaGraphicsResourceSetMapFlags() is also added with cudaGraphicsMapFlagsNone set.
• Use unsigned int rather than int to represent chunk ID.
• Refactor setting up texture in the constructor.
• Group cudaArray_t into a structure to reduce the number of function argument.
• Refactor copying buffer to GL texture using lambda functions.