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

Open-source WebGL/WebGPU 3D engine for the web

import { Vec2 } from "../../core/math/vec2.js";
import { random } from "../../core/math/random.js";
import { LIGHTTYPE_DIRECTIONAL } from "../../scene/constants.js";
import { BakeLight } from "./bake-light.js";
const _tempPoint = new Vec2();
class BakeLightSimple extends BakeLight {
	constructor(lightmapper, light) {
		super(lightmapper.scene, light, lightmapper.lightingParams);
	}
	get numVirtualLights() {
		if (this.light.type === LIGHTTYPE_DIRECTIONAL) {
			return this.light.bakeNumSamples;
		}
		return 1;
	}
	prepareVirtualLight(index, numVirtualLights) {
		const light = this.light;
		light._node.setLocalRotation(this.rotation);
		if (index > 0) {
			const directionalSpreadAngle = light.bakeArea;
			random.circlePointDeterministic(_tempPoint, index, numVirtualLights);
			_tempPoint.mulScalar(directionalSpreadAngle * 0.5);
			light._node.rotateLocal(_tempPoint.x, 0, _tempPoint.y);
		}
		light._node.getWorldTransform();
		const gamma = 2.2;
		const linearIntensity = Math.pow(this.intensity, gamma);
		light.intensity = Math.pow(linearIntensity / numVirtualLights, 1 / gamma);
	}
}
export {
	BakeLightSimple
};