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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);
复制代码 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);
复制代码 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));
复制代码 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());
- }
复制代码 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 });
- }
复制代码 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;
复制代码 四、最后
项目代码和演示地址:https://codesandbox.io/p/sandbox/threejs-mini-fans-dx6nm6
来源:https://www.cnblogs.com/one-yutian/p/17461954.html
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