Ability to paint by coordinate (setBlock)

[shama]

That way we don't need to re-mesh when changing a block types > 0.

/cc @vladikoff @vogonistic

[vladikoff]

https://github.com/shama/voxel-texture/blob/master/index.js#L219 already checks for a hex, where does it re-mesh?

[shama]

In engine, game.setBlock will queue the chunk into game.chunksNeedsUpdate. Then game.updateDirtyChunks will loop through those and call game.showChunk: https://github.com/maxogden/voxel-engine/blob/master/index.js#L528 That will then call voxel-mesh to re-mesh the chunk.

If we had a paint by coordinate here, we could just detect if the block is just changing types and paint the new UV coordinates onto the face and have voxel-engine skip all that unless the block is being removed/added.