pub fn flat_material_colors(
element_material_colors: &FxHashMap<u32, Vec<[f32; 4]>>,
) -> (Vec<u32>, Vec<u32>, Vec<u8>)Expand description
Flat wire encoding of the element material colour lists (#407/#913 §2.3):
(element_ids, counts, rgba8) — counts[i] colours belong to
element_ids[i], in order, 4 bytes each.