three.js去除网格

if (scene.getObjectByName('myMesh')) {
   scene.remove(scene.getObjectByName('myMesh'));
}

if (mesh) {
   mesh.geometry.dispose();
   mesh.material.dispose();
   scene.remove(mesh);
}

// 创建场景、相机和渲染器
const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
const renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

// 创建一个立方体网格
const geometry = new THREE.BoxGeometry();
const material = new THREE.MeshBasicMaterial({ color: 0x00ff00 });
const cube = new THREE.Mesh(geometry, material);
scene.add(cube);

camera.position.z = 5;

// 渲染循环
function animate() {
   requestAnimationFrame(animate);
   cube.rotation.x += 0.01;
   cube.rotation.y += 0.01;
   renderer.render(scene, camera);
}

animate();

// 5秒后移除立方体网格
setTimeout(() => {
   scene.remove(cube);
   cube.geometry.dispose();
   cube.material.dispose();
}, 5000);