threejs绘制球体

// 创建一个立方体几何体  
var cubeGeometry = new THREE.BoxGeometry(  
    0.5, 0.5, 0.5,  
    0.5, 0.5, 0.5,  
    0.5, 0.5, 0.5  
);  
  
// 创建一个球体几何体  
var sphereGeometry = new THREE.SphereGeometry(  
    5, 32, 32  
);  
  
// 创建一个多边形几何体  
var polygonGeometry = new THREE.Geometry();  
  
// 将顶点数组转换为多边形几何体的顶点  
var vertices = [  
    new THREE.Vector3(  
        -1, -1, -1  
    ),  
    new THREE.Vector3(  
        -1.5, -1.5, -1.5  
    ),  
    new THREE.Vector3(  
        -1.5, -1.5, -1.5  
    ),  
    new THREE.Vector3(  
        0, -1.5, -1.5  
    ),  
    new THREE.Vector3(  
        0, -1.5, -1.5  
    ),  
    new THREE.Vector3(  
        0, 0, -1  
    ),  
    new THREE.Vector3(  
        1, -1, -1  
    )  
];  
  
// 将顶点数组转换为球体几何体的顶点  
var sphere = new THREE.Vector3();  
for (var i = 0; i < vertices.length; i++) {  
    sphere.add(vertices[i]);  
}  
sphereGeometry.vertices = vertices;  
  
// 将多边形几何体添加到场景中  
var material = new THREE.MeshBasicMaterial({ color: 0xffffff });  
var mesh = new THREE.Mesh(sphereGeometry, material);  
scene.add(mesh);