请用threejs实现一段程序这段程序的功能是鼠标通过点击mesh结构上的某一个点能够获得该mesh上的某一点相对于世界坐标系的坐标

下面是使用Three.js实现的程序，可以通过点击mesh上的某一点，获取该点相对于世界坐标系的坐标：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Get Mesh Point in World Coordinate System</title>
    <style>
        body { margin: 0; }
        canvas { display: block; }
    </style>
</head>
<body>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
    <script>
        window.addEventListener('DOMContentLoaded', init);
        
        function init() {
            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);

            const geometry = new THREE.BoxGeometry();
            const material = new THREE.MeshBasicMaterial({ color: 0x00ff00 });
            const cube = new THREE.Mesh(geometry, material);
            scene.add(cube);

            const raycaster = new THREE.Raycaster();
            const mouse = new THREE.Vector2();
            const worldPosition = new THREE.Vector3();

            function onMouseClick(event) {
                mouse.x = (event.clientX / window.innerWidth) * 2 - 1;
                mouse.y = -(event.clientY / window.innerHeight) * 2 + 1;

                raycaster.setFromCamera(mouse, camera);

                const intersects = raycaster.intersectObject(cube);

                if (intersects.length > 0) {
                    const point = intersects[0].point;
                    point.applyMatrix4(cube.matrixWorld);
                    console.log("Point in World Coordinate System:", point);
                }
            }

            window.addEventListener('click', onMouseClick);

            camera.position.z = 5;

            function animate() {
                requestAnimationFrame(animate);

                cube.rotation.x += 0.01;
                cube.rotation.y += 0.01;

                renderer.render(scene, camera);
            }

            animate();
        }
    </script>
</body>
</html>

在这个例子中，我们创建了一个立方体mesh，并给它添加了一个点击事件监听器。当我们点击立方体时，程序会通过Raycaster来获取点击点的坐标，并将其转换为世界坐标系下的坐标。最后，将该点的坐标打印到控制台上

请用threejs实现一段程序这段程序的功能是鼠标通过点击mesh结构上的某一个点能够获得该mesh上的某一点相对于世界坐标系的坐标