Three.js通过鼠标单击切换对象位置

// 1. 设置场景、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);

// 2. 添加一个立方体对象
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;

// 3. 为场景添加鼠标点击事件监听器
const raycaster = new THREE.Raycaster();
const mouse = new THREE.Vector2();

function onMouseClick(event) {
    // 将鼠标点击位置归一化为-1到1之间的值
    mouse.x = (event.clientX / window.innerWidth) * 2 - 1;
    mouse.y = -(event.clientY / window.innerHeight) * 2 + 1;

    // 更新射线与鼠标接触点
    raycaster.setFromCamera(mouse, camera);

    // 计算物体和射线的交点
    const intersects = raycaster.intersectObject(cube);

    if (intersects.length > 0) {
        // 4. 检测鼠标点击位置并计算与对象的位置差异
        const difference = intersects[0].point.clone().sub(cube.position);

        // 5. 切换对象位置
        cube.position.add(difference);
    }
}

window.addEventListener('click', onMouseClick, false);

// 渲染场景
function animate() {
    requestAnimationFrame(animate);
    renderer.render(scene, camera);
}
animate();