three.js实现扩散波效果

图例

步骤

1. 创建一个圆柱，不要顶与底面
2. 材质允许透明，双面显示
3. 动态修改缩放与透明度

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;
let s = 0; // 缩放
let p = 160; // 透明度
init();
render();
function init() {// 场景scene = new THREE.Scene();// 相机camera = new THREE.PerspectiveCamera(45,canvasWidth / canvasHeight,1,10000);camera.position.set(600, 600, 600);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.CylinderGeometry(50, 50, 20, 32, 1, true);const m = new THREE.MeshBasicMaterial({color: 0x00ffff,side: THREE.DoubleSide,transparent: true,});mesh = new THREE.Mesh(g, m);mesh.position.set(0, 10, 0);scene.add(mesh);console.log(mesh);
}function render() {if (s > 160) {s = 0;p = 160;}mesh.scale.set(1 + s / 60, 1, 1 + s / 60);mesh.material.opacity = p / 160;s++;p--;renderer.render(scene, camera);requestAnimationFrame(render);
}
onMounted(() => {canvesRef.value.appendChild(renderer.domElement);
});
</script><style lang="scss" scoped>
.app {position: relative;
}
</style>