playcanvas
Version:
Open-source WebGL/WebGPU 3D engine for the web
43 lines (42 loc) • 1.41 kB
JavaScript
var __defProp = Object.defineProperty;
var __defNormalProp = (obj, key, value) => key in obj ? __defProp(obj, key, { enumerable: true, configurable: true, writable: true, value }) : obj[key] = value;
var __publicField = (obj, key, value) => __defNormalProp(obj, typeof key !== "symbol" ? key + "" : key, value);
import { Vec3 } from "../../core/math/vec3.js";
import { LIGHTTYPE_DIRECTIONAL } from "../constants.js";
const lightCubeDir = [
new Vec3(-1, 0, 0),
new Vec3(1, 0, 0),
new Vec3(0, -1, 0),
new Vec3(0, 1, 0),
new Vec3(0, 0, -1),
new Vec3(0, 0, 1)
];
class LightCube {
constructor() {
__publicField(this, "colors", new Float32Array(6 * 3));
}
update(ambientLight, lights) {
const colors = this.colors;
const { r, g, b } = ambientLight;
for (let j = 0; j < 6; j++) {
colors[j * 3] = r;
colors[j * 3 + 1] = g;
colors[j * 3 + 2] = b;
}
for (let j = 0; j < lights.length; j++) {
const light = lights[j];
if (light._type === LIGHTTYPE_DIRECTIONAL) {
for (let c = 0; c < 6; c++) {
const weight = Math.max(lightCubeDir[c].dot(light._direction), 0) * light._intensity;
const lightColor = light._color;
colors[c * 3] += lightColor.r * weight;
colors[c * 3 + 1] += lightColor.g * weight;
colors[c * 3 + 2] += lightColor.b * weight;
}
}
}
}
}
export {
LightCube
};