Class LightingEffect

modules/core/src/effects/lighting/lighting-effect.ts:40–218

// Class to manage ambient, point and directional light sources in deck
export default class LightingEffect implements Effect {
  id = 'lighting-effect';
  props!: LightingEffectProps;
  shadowColor: [number, number, number, number] = DEFAULT_SHADOW_COLOR;
  context?: EffectContext;

  private shadow: boolean = false;
  private ambientLight?: AmbientLight;
  private directionalLights: DirectionalLight[] = [];
  private pointLights: PointLight[] = [];
  private shadowPasses: ShadowPass[] = [];
  private dummyShadowMap: Texture | null = null;
  private shadowMatrices?: Matrix4[];

  constructor(props: LightingEffectProps = {}) {
    this.setProps(props);
  }

  setup(context: EffectContext) {
    this.context = context;
    const {device, deck} = context;

    if (this.shadow && !this.dummyShadowMap) {
      this._createShadowPasses(device);

      deck._addDefaultShaderModule(shadow);

      this.dummyShadowMap = device.createTexture({
        width: 1,
        height: 1
      });
    }
  }

  setProps(props: LightingEffectProps) {
    this.ambientLight = undefined;
    this.directionalLights = [];
    this.pointLights = [];

    for (const key in props) {
      const lightSource = props[key];

      switch (lightSource.type) {
        case 'ambient':
          this.ambientLight = lightSource;
          break;

        case 'directional':
          this.directionalLights.push(lightSource);
          break;

        case 'point':
          this.pointLights.push(lightSource);
          break;
        default:
      }
    }
    this._applyDefaultLights();