Function block_mesh::visible_block_faces

pub fn visible_block_faces<T, S>(
    voxels: &[T], 
    voxels_shape: &S, 
    min: [u32; 3], 
    max: [u32; 3], 
    faces: &[OrientedBlockFace; 6], 
    output: &mut UnitQuadBuffer
) where
    T: Voxel,
    S: Shape<3, Coord = u32>, 

A fast and simple meshing algorithm that produces a single quad for every visible face of a block.

This is faster than greedy_quads but it produces many more quads.