src/constants.js

export const DEFAULT_MATERIAL = 100;
export const BASIC_MATERIAL = 101;
export const FLATSHADING_MATERIAL = 102;
export const SEM_MATERIAL = 103;
export const RAW_MATERIAL = 104;

export const AMBIENT_LIGHT = 200;
export const DIRECTIONAL_LIGHT = 201;
export const POINT_LIGHT = 202;

export const MAX_DIRECTIONAL = 2;