webgl_materials_displacementmap
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 { OBJLoader } from "three/examples/jsm/loaders/OBJLoader.js";
/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
name: "webgl_materials_displacementmap",
useLoaders: [OBJLoader],
info: [
[
{ tag: "a", link: "https://threejs.org", content: "three.js" },
{ tag: "text", content: "- (normal + ao + displacement + environment) map demo." }
],
[
{ tag: "text", content: "ninja head from" },
{
tag: "a",
link: "https://gpuopen.com/archive/gamescgi/amd-gpu-meshmapper/",
content: "AMD GPU MeshMapper"
}
]
],
init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
let stats;
let camera, scene, renderer, controls;
const settings = {
metalness: 1,
roughness: 0.4,
ambientIntensity: 0.2,
aoMapIntensity: 1,
envMapIntensity: 1,
displacementScale: 2.436143,
// from original model
normalScale: 1
};
let mesh, material;
let pointLight, ambientLight;
const height = 500;
let r = 0;
init();
initGui();
function initGui() {
const gui = new GUI();
gui.add(settings, "metalness").min(0).max(1).onChange(function(value) {
material.metalness = value;
});
gui.add(settings, "roughness").min(0).max(1).onChange(function(value) {
material.roughness = value;
});
gui.add(settings, "aoMapIntensity").min(0).max(1).onChange(function(value) {
material.aoMapIntensity = value;
});
gui.add(settings, "ambientIntensity").min(0).max(1).onChange(function(value) {
ambientLight.intensity = value;
});
gui.add(settings, "envMapIntensity").min(0).max(3).onChange(function(value) {
material.envMapIntensity = value;
});
gui.add(settings, "displacementScale").min(0).max(3).onChange(function(value) {
material.displacementScale = value;
});
gui.add(settings, "normalScale").min(-1).max(1).onChange(function(value) {
material.normalScale.set(1, -1).multiplyScalar(value);
});
}
function init() {
renderer = new THREE.WebGLRenderer({ canvas });
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setAnimationLoop(animate);
scene = new THREE.Scene();
const aspect = window.innerWidth / window.innerHeight;
camera = new THREE.OrthographicCamera(
-500 * aspect,
height * aspect,
height,
-500,
1,
1e4
);
camera.position.z = 1500;
scene.add(camera);
controls = new OrbitControls(camera, renderer.domElement);
controls.enableZoom = false;
controls.enableDamping = true;
ambientLight = new THREE.AmbientLight(16777215, settings.ambientIntensity);
scene.add(ambientLight);
pointLight = new THREE.PointLight(16711680, 1.5, 0, 0);
pointLight.position.z = 2500;
scene.add(pointLight);
const pointLight2 = new THREE.PointLight(16737894, 3, 0, 0);
camera.add(pointLight2);
const pointLight3 = new THREE.PointLight(255, 1.5, 0, 0);
pointLight3.position.x = -1e3;
pointLight3.position.z = 1e3;
scene.add(pointLight3);
const path = "textures/cube/SwedishRoyalCastle/";
const format = ".jpg";
const urls = [
path + "px" + format,
path + "nx" + format,
path + "py" + format,
path + "ny" + format,
path + "pz" + format,
path + "nz" + format
];
const reflectionCube = new THREE.CubeTextureLoader().load(urls);
const textureLoader = new THREE.TextureLoader();
const normalMap = textureLoader.load("models/obj/ninja/normal.png");
const aoMap = textureLoader.load("models/obj/ninja/ao.jpg");
const displacementMap = textureLoader.load("models/obj/ninja/displacement.jpg");
material = new THREE.MeshStandardMaterial({
color: 12698049,
roughness: settings.roughness,
metalness: settings.metalness,
normalMap,
normalScale: new THREE.Vector2(1, -1),
// why does the normal map require negation in this case?
aoMap,
aoMapIntensity: 1,
displacementMap,
displacementScale: settings.displacementScale,
displacementBias: -0.428408,
// from original model
envMap: reflectionCube,
envMapIntensity: settings.envMapIntensity,
side: THREE.DoubleSide
});
const loader = new OBJLoader();
loader.load("models/obj/ninja/ninjaHead_Low.obj", function(group) {
const geometry = group.children[0].geometry;
geometry.center();
mesh = new THREE.Mesh(geometry, material);
mesh.scale.multiplyScalar(25);
scene.add(mesh);
});
stats = new Stats(renderer);
window.addEventListener("resize", onWindowResize);
needToDispose(renderer, scene, controls);
}
function onWindowResize() {
const aspect = window.innerWidth / window.innerHeight;
camera.left = -500 * aspect;
camera.right = height * aspect;
camera.top = height;
camera.bottom = -500;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function animate() {
controls.update();
stats.begin();
render();
stats.end();
stats.update();
}
function render() {
pointLight.position.x = 2500 * Math.cos(r);
pointLight.position.z = 2500 * Math.sin(r);
r += 0.01;
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;