playcanvas/build/playcanvas/src/scene/shader-lib/programs/lit-options-utils.js

PlayCanvas WebGL game engine

import { LIGHTTYPE_DIRECTIONAL } from '../../constants.js';

const LitOptionsUtils = {
		generateKey (options) {
				return `lit${Object.keys(options).sort().map((key)=>{
						if (key === 'shaderChunks') {
								return options.shaderChunks?.key ?? '';
						} else if (key === 'lights') {
								return LitOptionsUtils.generateLightsKey(options);
						}
						return key + options[key];
				}).join('\n')}`;
		},
		generateLightsKey (options) {
				return `lights:${options.lights.map((light)=>{
						return !options.clusteredLightingEnabled || light._type === LIGHTTYPE_DIRECTIONAL ? `${light.key},` : '';
				}).join('')}`;
		}
};

export { LitOptionsUtils };