three.js实现信号波效果

图例

步骤

1. 创建平面，添加贴图，平移几何体
2. 缩放

代码

<template><div class="app"><div ref="canvesRef" class="canvas-wrap"></div></div>
</template><script setup>
import { ref, onMounted } from "vue";
import * as THREE from "three";
import { OrbitControls } from "three/addons/controls/OrbitControls.js";const canvesRef = ref(null);
const canvasWidth = window.innerWidth;
const canvasHeight = window.innerHeight;
let scene;
let camera;
let renderer;
let axesHelper;
let cameraControls;
let mesh;
var l = 60; //波动距离
var s = 1; // 缩放倍数
init();
render();
function init() {// 场景scene = new THREE.Scene();// 相机camera = new THREE.PerspectiveCamera(45,canvasWidth / canvasHeight,1,10000);camera.position.set(0, 0, 350);camera.lookAt(0, 0, 0);// 模型addModel();// 坐标辅助对象axesHelper = new THREE.AxesHelper(200);scene.add(axesHelper);// 渲染器//antialias - 是否执行抗锯齿。默认为false.renderer = new THREE.WebGLRenderer();renderer.setSize(canvasWidth, canvasHeight);// 相机轨道控制器cameraControls = new OrbitControls(camera, renderer.domElement);
}function addModel() {const g = new THREE.PlaneGeometry(2, 1);g.translate(-1, 0, 0);const m = new THREE.MeshBasicMaterial({color: 0x00ffff,map: new THREE.TextureLoader().load("../src/assets/img/信号波.png"),side: THREE.DoubleSide,transparent: true,});mesh = new THREE.Mesh(g, m);console.log(mesh);scene.add(mesh);
}function render() {renderer.render(scene, camera);s += 0.6;mesh.scale.set(s, s, s);if (s <= l * 0.2) {mesh.material.opacity = (s - 1) / (l * 0.2 - 1); //保证透明度在0~1之间变化} else if (s > l * 0.2 && s <= l) {mesh.material.opacity = 1 - (s - l * 0.2) / (l - l * 0.2); //保证透明度在0~1之间变化} else {s = 1.0;}requestAnimationFrame(render);
}
onMounted(() => {canvesRef.value.appendChild(renderer.domElement);
});
</script><style lang="scss" scoped>
.app {position: relative;
}
</style>

图片（透明的）