misc_controls_transform
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 { TransformControls } from "three/examples/jsm/controls/TransformControls.js";
/** @type {import("@minisheeep/mp-three-examples").OfficialExampleInfo} */
const exampleInfo = {
name: "misc_controls_transform",
useLoaders: [],
info: [
[
{
tag: "a",
link: "https://threejs.org",
content: "three.js"
},
{
tag: "text",
content: "- transform controls"
}
]
],
init: ({ window, canvas, GUI, Stats, needToDispose, useFrame }) => {
let cameraPersp, cameraOrtho, currentCamera;
let scene, renderer, control, orbit;
init();
render();
function init() {
renderer = new THREE.WebGLRenderer({ antialias: true, canvas });
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
const aspect = window.innerWidth / window.innerHeight;
const frustumSize = 5;
cameraPersp = new THREE.PerspectiveCamera(50, aspect, 0.1, 100);
cameraOrtho = new THREE.OrthographicCamera(
-5 * aspect,
frustumSize * aspect,
frustumSize,
-5,
0.1,
100
);
currentCamera = cameraPersp;
currentCamera.position.set(5, 2.5, 5);
scene = new THREE.Scene();
scene.add(new THREE.GridHelper(5, 10, 8947848, 4473924));
const ambientLight = new THREE.AmbientLight(16777215);
scene.add(ambientLight);
const light = new THREE.DirectionalLight(16777215, 4);
light.position.set(1, 1, 1);
scene.add(light);
const texture = new THREE.TextureLoader().load("textures/crate.gif", render);
texture.colorSpace = THREE.SRGBColorSpace;
texture.anisotropy = renderer.capabilities.getMaxAnisotropy();
const geometry = new THREE.BoxGeometry();
const material = new THREE.MeshLambertMaterial({ map: texture });
orbit = new OrbitControls(currentCamera, renderer.domElement);
orbit.update();
orbit.addEventListener("change", render);
control = new TransformControls(currentCamera, renderer.domElement);
control.addEventListener("change", render);
control.addEventListener("dragging-changed", function(event) {
orbit.enabled = !event.value;
});
const mesh = new THREE.Mesh(geometry, material);
scene.add(mesh);
control.attach(mesh);
if (control.isObject3D) {
scene.add(control);
} else {
const gizmo = control.getHelper();
scene.add(gizmo);
}
window.addEventListener("resize", onWindowResize);
const state = {
enabled: true,
mode: control.mode,
snap: false,
reset() {
control.reset();
},
size: control.size,
space: control.space,
toggleCamera() {
const position = currentCamera.position.clone();
currentCamera = currentCamera.isPerspectiveCamera ? cameraOrtho : cameraPersp;
currentCamera.position.copy(position);
orbit.object = currentCamera;
control.camera = currentCamera;
currentCamera.lookAt(orbit.target.x, orbit.target.y, orbit.target.z);
onWindowResize();
},
randomZoom() {
const randomFoV = Math.random() + 0.1;
const randomZoom = Math.random() + 0.1;
cameraPersp.fov = randomFoV * 160;
cameraOrtho.bottom = -randomFoV * 500;
cameraOrtho.top = randomFoV * 500;
cameraPersp.zoom = randomZoom * 5;
cameraOrtho.zoom = randomZoom * 5;
onWindowResize();
}
};
const gui = new GUI();
gui.add(control, "enabled");
gui.add(state, "mode", ["translate", "rotate", "scale"]).onChange((mode) => {
control.setMode(mode);
});
gui.add(state, "snap").name("snap to grid").onChange((snap) => {
if (snap) {
control.setTranslationSnap(1);
control.setRotationSnap(THREE.MathUtils.degToRad(15));
control.setScaleSnap(0.25);
} else {
control.setTranslationSnap(null);
control.setRotationSnap(null);
control.setScaleSnap(null);
}
});
gui.add(state, "size", 0.1, 5, 0.1).onChange((size) => {
control.setSize(size);
});
gui.add(state, "space", ["local", "world"]).onChange((space) => {
control.setSpace(space);
});
gui.add(control, "showX");
gui.add(control, "showY");
gui.add(control, "showZ");
gui.add(state, "toggleCamera").name("toggle camera");
gui.add(state, "randomZoom").name("random zoom");
gui.add(state, "reset");
needToDispose(renderer, control, scene);
}
function onWindowResize() {
const aspect = window.innerWidth / window.innerHeight;
cameraPersp.aspect = aspect;
cameraPersp.updateProjectionMatrix();
cameraOrtho.left = cameraOrtho.bottom * aspect;
cameraOrtho.right = cameraOrtho.top * aspect;
cameraOrtho.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
render();
}
function render() {
renderer.render(scene, currentCamera);
}
}
};
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;