Introducing Free-slip Hydraulic Erosion

Release 0.3.0

This is a update for #15 to address suggestion pointed out in #1.

New feature

• Water droplet can now freely move to their respective neighbour chunks instead of ending its lifetime early.
• Adding two INI lines freeSlipX and freeSlipZ, denotes the number of chunk in X and Z direction that will be used as neighbours for free-slip synchronisation.
• Implementing local to global index lookup table to reference neighbour chunks efficiently.
• Implementing interpolation index lookup table to correct edge seams efficiently.
• Update CUDA toolkit version to 11.3 for bug fixe stated in #14, improvement in performance and new features, this will be the minimum requirement in all future releases.

Other improvement

• A major overhaul to kernel launch and host multithread model.
• Remove dedicated normal map cache in memory.
• Integreate heightmap and normalmap into a single texture in rendering buffer.
• Reduce rendering buffer clear buffer size by 20%.
• Merge formatting kernel and normalmap generation kernel into one new kenel, rendering buffer generation kernel, thus cutting down the number of kernel launch and copy both by 20%.
• Precache heightmap into shared memory during normalmap generation.
• Fixing over-allocated memory, improve memory use efficiency.
• cudaStream_t is now pooled.
• General programming practice and style improvement.
• Documentation for free-slip erosion.