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Ambient Occlusion

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@stephen-hqxu stephen-hqxu released this 09 Mar 22:33
v0.12.8
e5a0b6a

Release 0.12.8

We introduced SSAO in release 0.11.8 as a fundamental technique for ambient occlusion. In this release a more modern ambient occlusion technique is brought to SuperTerrain+.

Horizon-based ambient occlusion

  • Implement HBAO based on the current implementation of ambinet occlusion.
  • Enable switching between different AO algorithms in STPAmbientOcclusion.
  • Rename STPScreenSpaceAmbientOcclusion.glsl to STPAmbienOcclusion.glsl for generality.
  • Refactor and optimise view space geometry calculation.

General fixes and improvement

  • Explicit initialisation to sqlite database during SuperTerrain+ engine initialisation.
  • Fix a undefined behaviour when naming the texture database STPTextureDatabase where operator+ is used between a const char* and unsigned int. Surround the integer with to_string to fix the issue.
  • Add STPProjectionCategory in STPCamera to identify the type of projection of a camera instance.
  • Use offsetof operator to identify variable offset instead of using hardcoded offset in STPScenePipeline::STPCameraInformationMemory.
  • Add support for GL extension GL_NV_representative_fragment_test.
  • Refactor heightfield triple texture scale blending system to cut down the scale of branching and divergence.
  • Deprecate and remove support for logarithmic depth buffer because it is not friendly to depth reconstruction. We will consider using reversed depth buffer in the future release.
  • Add ambient occlusion texture for the demo application.
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