Question

我正在使用three.js创建一个场景，我正在添加3个球体。然后我试图将从线框创建的所有球体切换到非线框材质。我没有使用scene.traverse（），因为我的场景中有更多的对象，我只想切换球体，但是使用这个代码，我只能切换一个球体。我怎样才能进入每个领域？有帮助吗？谢谢！

var numSpheres = 3;

function createSphere (x, y, z){

    sphere = new THREE.Object3D();

    material = new THREE.MeshBasicMaterial({ color: 0XFFA500, wireframe: true});
    geometry = new THREE.SphereGeometry (2, 8, 8);
    mesh = new THREE.Mesh(geometry, material);

    sphere.add(mesh);
    sphere.position.set(x, y, z);

    scene.add(sphere);
}

createSpheres(numSpheres){

    for(i = 1; i <= numSpheres; i++){       
        var randomnumber1 = Math.floor(Math.random() * (29.5 - -29.5 + 1)) + -29.5;
        var randomnumber2 = Math.floor(Math.random() * (29.5 - -29.5 + 1)) + -29.5;

        createSphere(randomnumber1, 3, randomnumber2);
    }
}
function onKeyDown(e){

    case 65: 
    case 97:
        sphere.traverse(function (node){
                if(node instanceof THREE.mesh) {
                    node.material.wireframe = !node.material.wireframe;
                }
        });

Answer 1

正如@ prisoner849建议的那样，将您想要操作的对象放在数组或映射中（如@ prisoner849建议的那样）。这样，您就可以避免测试dataGridView，并且只操纵想要操作的对象。

instanceof THREE.Mesh

Answer 2

如果您将来可以逐个到达您的球体，则大多数亲戚都是对象中的数组：

 function createSphere (x, y, z){

        var sphere= new THREE.Mesh(new THREE.SphereGeometry (2, 8, 8), new THREE.MeshBasicMaterial({ color: 0XFFA500, wireframe: true}));

        scene.add(sphere);
        sphere.position.set(x, y, z);    
        return sphere;

 }

 mySpheres = {};
 mySpheres.models = [];
 mySpheres.materials = [];

 for(i = 1; i <= 3; i++){       
        var randomnumber1 = Math.floor(Math.random() * (29.5 - -29.5 + 1)) + -29.5;
        var randomnumber2 = Math.floor(Math.random() * (29.5 - -29.5 + 1)) + -29.5;

        var obj = createSphere(randomnumber1, 3, randomnumber2); // 
        var id = obj.id; // or whartever (redone,barrack,donald,george)
        mySpheres.models[id] = obj;
        mySpheres.materials.push(obj.material);
 }


    //after that you can do 
    mySpheres.models['donald'].translateX(10); 
    //or 
    mySpheres.models['george'].material.opacity = 0.5;
    //or
    mySpheres.materials.forEach(function(m) {
         m.opacity = 0.5;
    });

我如何操纵我创建的每个对象？ three.js所

2 个答案: