misc_controls_trackball
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 { TrackballControls } from "three/examples/jsm/controls/TrackballControls.js";
/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
name: "misc_controls_trackball",
useLoaders: [],
info: [
[
{
tag: "a",
link: "https://threejs.org",
content: "three.js"
},
{
tag: "text",
content: "- trackball controls"
}
]
],
init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
let perspectiveCamera, orthographicCamera, controls, scene, renderer, stats;
const params = {
orthographicCamera: false
};
const frustumSize = 400;
init();
function init() {
const aspect = window.innerWidth / window.innerHeight;
perspectiveCamera = new THREE.PerspectiveCamera(60, aspect, 1, 1e3);
perspectiveCamera.position.z = 500;
orthographicCamera = new THREE.OrthographicCamera(
frustumSize * aspect / -2,
frustumSize * aspect / 2,
frustumSize / 2,
frustumSize / -2,
1,
1e3
);
orthographicCamera.position.z = 500;
scene = new THREE.Scene();
scene.background = new THREE.Color(13421772);
scene.fog = new THREE.FogExp2(13421772, 2e-3);
const geometry = new THREE.ConeGeometry(10, 30, 4, 1);
const material = new THREE.MeshPhongMaterial({ color: 16777215, flatShading: true });
for (let i = 0; i < 500; i++) {
const mesh = new THREE.Mesh(geometry, material);
mesh.position.x = (Math.random() - 0.5) * 1e3;
mesh.position.y = (Math.random() - 0.5) * 1e3;
mesh.position.z = (Math.random() - 0.5) * 1e3;
mesh.updateMatrix();
mesh.matrixAutoUpdate = false;
scene.add(mesh);
}
const dirLight1 = new THREE.DirectionalLight(16777215, 3);
dirLight1.position.set(1, 1, 1);
scene.add(dirLight1);
const dirLight2 = new THREE.DirectionalLight(8840, 3);
dirLight2.position.set(-1, -1, -1);
scene.add(dirLight2);
const ambientLight = new THREE.AmbientLight(5592405);
scene.add(ambientLight);
renderer = new THREE.WebGLRenderer({ antialias: true, canvas });
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setAnimationLoop(animate);
stats = new Stats(renderer);
const gui = new GUI();
gui.add(params, "orthographicCamera").name("use orthographic").onChange(function(value) {
controls.dispose();
createControls(value ? orthographicCamera : perspectiveCamera);
});
window.addEventListener("resize", onWindowResize);
createControls(perspectiveCamera);
needToDispose(() => [renderer, scene, controls]);
}
function createControls(camera) {
controls = new TrackballControls(camera, renderer.domElement);
controls.rotateSpeed = 1;
controls.zoomSpeed = 1.2;
controls.panSpeed = 0.8;
controls.keys = ["KeyA", "KeyS", "KeyD"];
}
function onWindowResize() {
const aspect = window.innerWidth / window.innerHeight;
perspectiveCamera.aspect = aspect;
perspectiveCamera.updateProjectionMatrix();
orthographicCamera.left = -400 * aspect / 2;
orthographicCamera.right = frustumSize * aspect / 2;
orthographicCamera.top = frustumSize / 2;
orthographicCamera.bottom = -400 / 2;
orthographicCamera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
controls.handleResize();
}
function animate() {
controls.update();
render();
stats.update();
}
function render() {
const camera = params.orthographicCamera ? orthographicCamera : perspectiveCamera;
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;