Continuous voxel colors

[piellardj]

It would be nice for the voxels to have a bit of nuance in their coloring, instead of hard threshold.

Above, hard threshold: voxels are sand-colored and then suddenly grass-colored

Above, nuancing: voxels go softly from sand to grass

The tricky thing is that the engine must know in advance all the possible voxel materials, so how could we handle all the possible colors ?

Idea:

• in the world:
  • preallocate a color palette (4096 colors for instance, which will be as many materialId)
  • define key colors: sand is yellow, grass is green, rock is grey etc.
  • when computing a voxel, the world determines all the types it is (example: this voxel is 25% grass, 75% sand). From this, the world computes the exact color the voxel should be, by interpolation
  • find the closest color in the palette
  • set this voxel to the associated materialId

An example is in the test scene of aresrpg-engine