webgl_lights_spotlight
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 { PLYLoader } from "three/examples/jsm/loaders/PLYLoader.js";
import { OrbitControls } from "three/examples/jsm/controls/OrbitControls.js";
/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
name: "webgl_lights_spotlight",
useLoaders: [PLYLoader],
info: [
[
{
tag: "a",
link: "https://threejs.org",
content: "three.js"
},
{
tag: "text",
content: "webgl - spotlight"
}
]
],
init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
let renderer, scene, camera;
let spotLight, lightHelper;
init();
function init() {
renderer = new THREE.WebGLRenderer({ antialias: true, canvas });
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setAnimationLoop(animate);
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.PCFSoftShadowMap;
renderer.toneMapping = THREE.ACESFilmicToneMapping;
renderer.toneMappingExposure = 1;
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera(40, window.innerWidth / window.innerHeight, 0.1, 100);
camera.position.set(7, 4, 1);
const controls = new OrbitControls(camera, renderer.domElement);
controls.minDistance = 2;
controls.maxDistance = 10;
controls.maxPolarAngle = Math.PI / 2;
controls.target.set(0, 1, 0);
controls.update();
const ambient = new THREE.HemisphereLight(16777215, 9276813, 0.15);
scene.add(ambient);
const loader = new THREE.TextureLoader().setPath("textures/");
const filenames = ["disturb.jpg", "colors.png", "uv_grid_opengl.jpg"];
const textures = { none: null };
for (let i = 0; i < filenames.length; i++) {
const filename = filenames[i];
const texture = loader.load(filename);
texture.minFilter = THREE.LinearFilter;
texture.magFilter = THREE.LinearFilter;
texture.colorSpace = THREE.SRGBColorSpace;
textures[filename] = texture;
}
spotLight = new THREE.SpotLight(16777215, 100);
spotLight.position.set(2.5, 5, 2.5);
spotLight.angle = Math.PI / 6;
spotLight.penumbra = 1;
spotLight.decay = 2;
spotLight.distance = 0;
spotLight.map = textures["disturb.jpg"];
spotLight.castShadow = true;
spotLight.shadow.mapSize.width = 1024;
spotLight.shadow.mapSize.height = 1024;
spotLight.shadow.camera.near = 1;
spotLight.shadow.camera.far = 10;
spotLight.shadow.focus = 1;
scene.add(spotLight);
lightHelper = new THREE.SpotLightHelper(spotLight);
scene.add(lightHelper);
const geometry = new THREE.PlaneGeometry(200, 200);
const material = new THREE.MeshLambertMaterial({ color: 12369084 });
const mesh = new THREE.Mesh(geometry, material);
mesh.position.set(0, -1, 0);
mesh.rotation.x = -Math.PI / 2;
mesh.receiveShadow = true;
scene.add(mesh);
new PLYLoader().load("models/ply/binary/Lucy100k.ply", function(geometry2) {
geometry2.scale(24e-4, 24e-4, 24e-4);
geometry2.computeVertexNormals();
const material2 = new THREE.MeshLambertMaterial();
const mesh2 = new THREE.Mesh(geometry2, material2);
mesh2.rotation.y = -Math.PI / 2;
mesh2.position.y = 0.8;
mesh2.castShadow = true;
mesh2.receiveShadow = true;
scene.add(mesh2);
});
window.addEventListener("resize", onWindowResize);
const gui = new GUI();
const params = {
map: textures["disturb.jpg"],
color: spotLight.color.getHex(),
intensity: spotLight.intensity,
distance: spotLight.distance,
angle: spotLight.angle,
penumbra: spotLight.penumbra,
decay: spotLight.decay,
focus: spotLight.shadow.focus,
shadows: true
};
gui.add(params, "map", textures).onChange(function(val) {
spotLight.map = val;
});
gui.addColor(params, "color").onChange(function(val) {
spotLight.color.setHex(val);
});
gui.add(params, "intensity", 0, 500).onChange(function(val) {
spotLight.intensity = val;
});
gui.add(params, "distance", 0, 20).onChange(function(val) {
spotLight.distance = val;
});
gui.add(params, "angle", 0, Math.PI / 3).onChange(function(val) {
spotLight.angle = val;
});
gui.add(params, "penumbra", 0, 1).onChange(function(val) {
spotLight.penumbra = val;
});
gui.add(params, "decay", 1, 2).onChange(function(val) {
spotLight.decay = val;
});
gui.add(params, "focus", 0, 1).onChange(function(val) {
spotLight.shadow.focus = val;
});
gui.add(params, "shadows").onChange(function(val) {
renderer.shadowMap.enabled = val;
scene.traverse(function(child) {
if (child.material) {
child.material.needsUpdate = true;
}
});
});
gui.open();
needToDispose(renderer, scene, controls);
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
const startTime = Date.now();
function animate() {
const time = (Date.now() - startTime) / 3e3;
spotLight.position.x = Math.cos(time) * 2.5;
spotLight.position.z = Math.sin(time) * 2.5;
lightHelper.update();
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;