Method prepare

perro_source/render_stack/perro_meshlets/src/lib.rs:358–375

(&mut self, vertex_count: usize, tri_capacity: usize)

    }
    if lods.is_empty() {
        lods.push(LodSet {
            indices: indices.to_vec(),
            surface_ranges: base_surfaces,
        });
    }
    Ok(lods)
}

fn build_surface_lods(
    vertices: &[LodVertex],
    surface_indices: &[u32],
    ratios: &[f32],
) -> Vec<Vec<u32>> {
    let Some((&min_index, &max_index)) = surface_indices
        .iter()
        .min()
        .zip(surface_indices.iter().max())
    else {
        return ratios.iter().map(|_| Vec::new()).collect();
    };
    let min_vertex = min_index as usize;