It is very slow but seems to be working. It affines vertex positions,
but normals are not improved. Maybe more work will be done in the future
if that technique becomes more relevant.
Partly based on a prior experiment:
11f716f79d0ade59c0e9547a2333183e96b17b43
- Made a bunch of changes to comply with Godot 4 API
- Use Godot's Vector3i and add the missing stuff with helper functions
- Transvoxel uses custom attributes API, the old way would not work
- Wrap MeshOptimizer in a unique namespace (see build script why)
- Added clang-format file for the module as some rules now differ
- Prevent thirdparty code and lookup tables from being clang-formatted
- Very likely full of runtime bugs that need fixing
- VoxelBlock contains 6 optional transition meshes
- VoxelLodTerrain calculates transition masks when block visibility changes
- VoxelMesher can now specify different min and max paddings
- Fix Cube::SIDE_POSITIVE/NEGATIVE_X/Y/Z enum not matching Cube::g_side_normals
- Convert transition masks to make up for the Cube:: inconsistency for now
- Allow meshers to specify compression flags
- Use uncompressed COLOR to fit extra vertex data for transition meshes
- Simplify a few interpolations
- Fix a few buffer overruns which were not detected by the debugger
- Use array wrappers to better detect overrun mistakes
