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使用THREEJS实现一个可调节档位、可摇头的电风扇 世界短讯

来源:博客园


(资料图片仅供参考)

夏天到了,用Three.js实现一个可以摇头和调节档位的电风扇。主要使用到Blender处理3D模型,用Vite+Typescript搭建项目框架。效果演示:

一、处理模型

1、从爱(bai)给(gei)网下载一个风扇的3D模型,在Blender中打开,给模型贴上图。2、拆解模型。将风扇模型拆解成按钮、底座、扇叶、头部四个部分,其中按钮共五个,包括四个档位和一个摇头的开关。3、导出模型。导出GLTF格式模型。

二、场景搭建

1、初始化场景

this.scene = new THREE.Scene();/** 摄像机 */this.camera = new THREE.PerspectiveCamera(75, this.sizes.width / this.sizes.height, 0.1, 100);this.camera.position.set(0, 0.8, 1.8);/** 灯光 */this.lightPoint = new THREE.HemisphereLight(0xffffff, 0xffffff, 1 );this.lightPoint.position.set(0, 500, 0);this.scene.add(this.lightPoint);/** 控制器 */this.controls = new OrbitControls(this.camera, this.renderer.domElement);this.controls.enableKeys = false;    // 禁用按键this.controls.enableZoom = false;    // 禁用缩放this.controls.enablePan = false;     // 禁用拖拽this.controls.maxPolarAngle = 1.3;   // 最大垂直旋转角度this.controls.minPolarAngle = 1.3;   // 最小垂直旋转角度this.controls.target = new THREE.Vector3(0, 0.8, 0);

2、加载模型

import { GLTF, GLTFLoader } from "three/examples/jsm/loaders/GLTFLoader";var gltf: GLTF = await new Promise((resolve, _) => new GLTFLoader().load("./fan.glb", gltf => resolve(gltf)));this.scene.add(gltf.scene);

3、绑定风扇按钮

this.fan = new Fan(gltf);/** 档位调节按钮 */let btns: Array<[string, Level]> = [["Btn_1", Level.one],["Btn_2", Level.two],["Btn_3", Level.three],["Btn_4", Level.zero],];btns.forEach(([name, level]) => {let btn = gltf.scene.getObjectByName(name);if (btn) this.fan.btns.push(new LevelBtn(btn, level));});/** 摇头按钮 */let btn = gltf.scene.getObjectByName("Shake");if (btn) this.fan.btns.push(new ShakeBtn(btn));

三、功能实现

1、扇叶旋转

function update() {let leaf = this.obj.scene.getObjectByName("Leaf");let rotationY = leaf!.rotation.y + Math.PI/10 * this.speed;while(rotationY > Math.PI * 2) rotationY = rotationY - Math.PI * 2;leaf!.rotation.y = rotationY;requestAnimationFrame(() => update());}

2、档位调节

import { gsap } from "gsap";function turnLevel(btn: LevelBtn) {if(btn.state == BtnState.down) return;this.btns.filter(item => item instanceof LevelBtn).forEach(item => item.up());btn.down();if(btn.level !== Level.zero) this.state = State.on;this.level = btn.level;gsap.to(this, 3, { speed: this.level });}

3、左右摇头

let head = this.obj.scene.getObjectByName("Head");let shake = this.obj.scene.getObjectByName("Shake");let leaf = this.obj.scene.getObjectByName("Leaf");let rotationZ = head!.rotation.z + Math.PI / 1000 * this.shakeDir;if(Math.abs(rotationZ) > Math.abs(this.shakeRange)) {let shakeDir = this.shakeDir;setTimeout(() => {if(shakeDir == ShakeDir.left) this.shakeDir = ShakeDir.right;else if(shakeDir == ShakeDir.right) this.shakeDir = ShakeDir.left;}, 1000)this.shakeDir = ShakeDir.wait;rotationZ = Math.abs(this.shakeRange) * Math.abs(rotationZ) / rotationZ;}head!.rotation.z = rotationZ;leaf!.rotation.z = rotationZ;shake!.rotation.z = rotationZ;

四、最后

项目代码和演示地址:https://codesandbox.io/p/sandbox/threejs-mini-fans-dx6nm6

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