playcanvas/build/playcanvas/src/framework/lightmapper/bake-light.js

PlayCanvas WebGL game engine

import { BoundingBox } from '../../core/shape/bounding-box.js';
import { BoundingSphere } from '../../core/shape/bounding-sphere.js';
import { LIGHTTYPE_DIRECTIONAL } from '../../scene/constants.js';

const tempSphere = new BoundingSphere();
class BakeLight {
		constructor(scene, light, lightingParams){
				this.scene = scene;
				this.light = light;
				this.store();
				light.numCascades = 1;
				if (this.scene.clusteredLightingEnabled && !lightingParams.shadowsEnabled) {
						light.castShadows = false;
				}
				if (light.type !== LIGHTTYPE_DIRECTIONAL) {
						light._node.getWorldTransform();
						light.getBoundingSphere(tempSphere);
						this.lightBounds = new BoundingBox();
						this.lightBounds.center.copy(tempSphere.center);
						this.lightBounds.halfExtents.set(tempSphere.radius, tempSphere.radius, tempSphere.radius);
				}
		}
		store() {
				this.mask = this.light.mask;
				this.shadowUpdateMode = this.light.shadowUpdateMode;
				this.enabled = this.light.enabled;
				this.intensity = this.light.intensity;
				this.rotation = this.light._node.getLocalRotation().clone();
				this.numCascades = this.light.numCascades;
				this.castShadows = this.light._castShadows;
		}
		restore() {
				const light = this.light;
				light.mask = this.mask;
				light.shadowUpdateMode = this.shadowUpdateMode;
				light.enabled = this.enabled;
				light.intensity = this.intensity;
				light._node.setLocalRotation(this.rotation);
				light.numCascades = this.numCascades;
				light._castShadows = this.castShadows;
		}
		startBake() {
				this.light.enabled = true;
				this.light._destroyShadowMap();
				this.light.beginFrame();
		}
		endBake(shadowMapCache) {
				const light = this.light;
				light.enabled = false;
				if (light.shadowMap) {
						if (light.shadowMap.cached) {
								shadowMapCache.add(light, light.shadowMap);
						}
						light.shadowMap = null;
				}
		}
}

export { BakeLight };