Function updateMaterialIds

updateMaterialIds(
    material_mapping: number[],
    index_map: MaterialMap[],
    replacement_ndx: number,
): number[]
used to update materials lists when we remove a material. Works by taking an array of materials and then mapping their indexes to the one identified in the map If a mapping isn't found for a given number in the material list, it is replaced with the replacement value.
Parameters
- material_mapping: number[]
  the mapping of rows of cols to a material
- index_map: MaterialMap[]
  a map from old to new material ids
- replacement_ndx: number
  anything not found in the map will be replaced by this value
Returns number[]
- Defined in utils/utils.ts:296