webgl_materials_envmaps_exr
对应 three.js 示例地址 。
仅需关注 init 函数的内容，其他部分都是示例小程序所使用的描述配置。
js
import * as THREE from "three";
import { OrbitControls } from "three/examples/jsm/controls/OrbitControls.js";
import { EXRLoader } from "three/examples/jsm/loaders/EXRLoader.js";
/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
name: "webgl_materials_envmaps_exr",
useLoaders: [EXRLoader],
info: [
[
{
tag: "a",
link: "https://threejs.org",
content: "three.js"
},
{
tag: "text",
content: "- Example of an IBL (Image based lighting) pipeline based around"
}
],
[
{
tag: "text",
content: "equirectangular EXR lightprobe data. Created by"
},
{
tag: "a",
link: "https://github.com/richardmonette",
content: "Richard Monette"
}
]
],
init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
const params = {
envMap: "EXR",
roughness: 0,
metalness: 0,
exposure: 1,
debug: false
};
let stats;
let camera, scene, renderer, controls;
let torusMesh, planeMesh;
let pngCubeRenderTarget, exrCubeRenderTarget;
let pngBackground, exrBackground;
init();
function init() {
camera = new THREE.PerspectiveCamera(40, window.innerWidth / window.innerHeight, 1, 1e3);
camera.position.set(0, 0, 120);
scene = new THREE.Scene();
renderer = new THREE.WebGLRenderer({ canvas });
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setAnimationLoop(animate);
renderer.toneMapping = THREE.ACESFilmicToneMapping;
let geometry = new THREE.TorusKnotGeometry(18, 8, 150, 20);
let material = new THREE.MeshStandardMaterial({
metalness: params.metalness,
roughness: params.roughness,
envMapIntensity: 1
});
torusMesh = new THREE.Mesh(geometry, material);
scene.add(torusMesh);
geometry = new THREE.PlaneGeometry(200, 200);
material = new THREE.MeshBasicMaterial();
planeMesh = new THREE.Mesh(geometry, material);
planeMesh.position.y = -50;
planeMesh.rotation.x = -Math.PI * 0.5;
scene.add(planeMesh);
THREE.DefaultLoadingManager.onLoad = function() {
pmremGenerator.dispose();
};
new EXRLoader().load("textures/piz_compressed.exr", function(texture) {
texture.mapping = THREE.EquirectangularReflectionMapping;
exrCubeRenderTarget = pmremGenerator.fromEquirectangular(texture);
exrBackground = texture;
});
new THREE.TextureLoader().load("textures/equirectangular.png", function(texture) {
texture.mapping = THREE.EquirectangularReflectionMapping;
texture.colorSpace = THREE.SRGBColorSpace;
pngCubeRenderTarget = pmremGenerator.fromEquirectangular(texture);
pngBackground = texture;
});
const pmremGenerator = new THREE.PMREMGenerator(renderer);
pmremGenerator.compileEquirectangularShader();
stats = new Stats(renderer);
controls = new OrbitControls(camera, renderer.domElement);
controls.minDistance = 50;
controls.maxDistance = 300;
window.addEventListener("resize", onWindowResize);
const gui = new GUI();
gui.add(params, "envMap", ["EXR", "PNG"]);
gui.add(params, "roughness", 0, 1, 0.01);
gui.add(params, "metalness", 0, 1, 0.01);
gui.add(params, "exposure", 0, 2, 0.01);
gui.add(params, "debug");
gui.open();
needToDispose(renderer, scene, controls);
}
function onWindowResize() {
const width = window.innerWidth;
const height = window.innerHeight;
camera.aspect = width / height;
camera.updateProjectionMatrix();
renderer.setSize(width, height);
}
function animate() {
stats.begin();
render();
stats.end();
stats.update();
}
function render() {
torusMesh.material.roughness = params.roughness;
torusMesh.material.metalness = params.metalness;
let newEnvMap = torusMesh.material.envMap;
let background = scene.background;
switch (params.envMap) {
case "EXR":
newEnvMap = exrCubeRenderTarget ? exrCubeRenderTarget.texture : null;
background = exrBackground;
break;
case "PNG":
newEnvMap = pngCubeRenderTarget ? pngCubeRenderTarget.texture : null;
background = pngBackground;
break;
}
if (newEnvMap !== torusMesh.material.envMap) {
torusMesh.material.envMap = newEnvMap;
torusMesh.material.needsUpdate = true;
planeMesh.material.map = newEnvMap;
planeMesh.material.needsUpdate = true;
}
torusMesh.rotation.y += 5e-3;
planeMesh.visible = params.debug;
scene.background = background;
renderer.toneMappingExposure = params.exposure;
renderer.render(scene, camera);
}
}
};
export {
exampleInfo as default
};ts
import { Loader, TypedArray } from 'three';
/**
* 官网示例的多端使用封装把版本
* */
export interface OfficialExampleInfo extends MiniProgramMeta {
/*** 示例名称（保持和官网一致）*/
name: string;
/** main */
init: (context: LoadContext) => void;
}
export interface LoadContext {
//为了减少官方代码的改动，实际上等同于 canvas
window: EventTarget & { innerWidth: number; innerHeight: number; devicePixelRatio: number };
/** HTMLCanvasElement */
canvas: any;
/** https://www.npmjs.com/package/lil-gui */
GUI: any;
/**
* https://www.npmjs.com/package/stats.js
* 也可以使用其他受支持的版本
* */
Stats: any;
/** 收集需要 dispose 的对象（官方示例没有处理这部分）*/
needToDispose: (...objs: any[]) => void | ((fromFn: () => any[]) => void);
/**基于 raq 的通用封装 */
useFrame(animateFunc: (/** ms */ delta: number) => void): { cancel: () => void };
/** 显示加载模态框 */
requestLoading(text?: string): Promise<void>;
/** 隐藏加载模态框*/
cancelLoading(): void;
/** 保存文件的通用封装*/
saveFile(
fileName: string,
data: ArrayBuffer | TypedArray | DataView | string
): Promise<string | null>;
/** 示例使用 DracoDecoder 时的资源路径 */
DecoderPath: {
GLTF: string;
STANDARD: string;
};
/** 为资源路径拼上 CDN 前缀 */
withCDNPrefix(path: string): string;
/**
* 在小程序中应使用 import { VideoTexture } from '@minisheep/three-platform-adapter/override/jsm/textures/VideoTexture.js';
* 正常情况（web） 可直接使用 THREE.VideoTexture
* */
getVideoTexture(videoOptions: VideoOptions): Promise<[{ isVideoTexture: true }, video: any]>;
/**
* 在小程序中应使用 import { CameraTexture } from '@minisheep/three-platform-adapter/override/jsm/textures/CameraTexture.js';
* 正常情况（web） 可参考示例 webgl_materials_video_webcam
* */
getCameraTexture(): { isVideoTexture: true };
/** 用于动态修改 info 中的占位符*/
bindInfoText(template: `$${string}$`, initValue?: string): { value: string };
/** 分屏控件对应的事件回调 */
onSlideStart(handle: () => void): void;
/** 分屏控件对应的事件回调 */
onSlideEnd(handle: () => void): void;
/** 分屏控件对应的事件回调 */
onSlideChange(handle: (offset: number, boxSize: number) => void): void;
}
export type VideoOptions = {
src: string;
/** 相当于 HTMLVideoElement 的 naturalWidth (小程序中获取不到)*/
width: number;
/** 相当于 HTMLVideoElement 的 naturalHeight (小程序中获取不到)*/
height: number;
loop?: boolean;
autoplay?: boolean;
muted?: boolean;
};
/** 示例小程序中使用的一些配置 */
export interface MiniProgramMeta {
/** 用于统计加载相关信息 */
useLoaders: Loader[];
/** 通用 info */
info: TagItem[][];
/** 特殊 info */
infoPanel?: {
left?: [string, string][];
right?: [string, string][];
};
/** 分屏控件配置 */
needSlider?: {
/** 方向 */
direction?: 'horizontal' | 'vertical';
/** 初始偏移 0-100 */
initPosition?: number;
};
/** 操作摇杆控件 */
needArrowControls?: boolean;
/** 默认需要的画布类型 */
canvasType?: '2d' | 'webgl' | 'webgl2';
/** 为保持效果一致所需要的画布样式 */
canvasStyle?: {
bgColor?: string;
width?: number | string;
height?: number | string;
};
/** 部分示例需要在加载前进行一些提示 */
initAfterConfirm?: {
/**
* 提示类型
* @default 'default'
* */
type?: 'warning' | 'default';
text: string[];
};
}
export interface BaseTag<T extends string> {
tag: T;
content: string;
}
export interface ATag extends BaseTag<'a'> {
link: string;
}
export type TextTag = BaseTag<'text'>;
export type TagItem = TextTag | ATag;