Setup Ray Tracing Environment

Release 0.15.0-Preview.1

Setup OptiX

• Add a CMake module finder for OptiX.
• Add STPRendererErrorHandler to handle API errors from OptiX.

Setup ray tracing shader

• Implement simple ray tracing shaders for ray-primitive intersection test.
• Refactor STPCameraInformation.glsl slightly for code reuse.

Runtime compiler

• Split STPRuntimeCompilable into STPDeviceRuntimeBinary and STPDeviceRuntimeProgram. This is done to make future use of NVRTC for OptiX compilation easier.
  • STPDeviceRuntimeBinary is a wrapper over NVRTC and outputs nvrtcProgram.
  • STPDeviceRuntimeProgram is a wrapper over CUDA driver API module manager and outputs CUmodule.
• The new runtime compilers are now stateless.
• Explicitly manage memory of all const char* using std::string.
• Move device compute capability query to STPEngineInitialiser.

General fixes and improvement

• Simplify environment setup for SQLite and CUDA to use find_package instead of include.
• Use NDEBUG instead of _DEBUG to check for build mode in source code to maintain C++ standard.
• Remove flag --fmad=false from runtime compilers.

Config file template

• Refactor STPAlgorithmDeviceInfo and STPRealismInfo; remove redundant naming prefixes, enclose variables into appropriate namespaces.
• Add information regarding OptiX directory to STPRealismInfo.
• Add STPCoreInfo.h.in containing information regarding the core engine and include directory for libraries.

Error handler

• Add STPGenericErrorHandlerBlueprint as an extendable C API error handler.
• All definitions are now inlined. Use of template specialisation previously without header declaration leads to undefined behaviour.
• Split the old STPDeviceErrorHandler into STPDeviceErrorHandler for CUDA call and STPDatabaseErrorHandler for SQLite database call.
• Capitalise all macros and rename to reduce verbosity, for example STPcudaCheckErr is renamed to STP_CHECK_CUDA. However it creates a huge diff since all uses of such macros needs to be renamed.

STPSmartDeviceObject

• Merge STPSmartStream and STPSmartEvent into one file, called STPSmartDeviceObject.
• Add STPMemPool, STPTexture and STPSurface as two new managed CUDA objects for CUDA memory pool, texture and surface objects respectively.
• Remove tests for these CUDA objects because they are too trivial.