Function optimize_vertex_cache 

pub fn optimize_vertex_cache(
    destination: &mut [u32],
    indices: &[u32],
    vertex_count: usize,
)

Reorders indices to reduce the number of GPU vertex shader invocations.

If index buffer contains multiple ranges for multiple draw calls, this functions needs to be called on each range individually.

Arguments

• destination: must contain enough space for the resulting index buffer (indices.len() elements)