我正在创建爆炸和内爆的按钮，将场景中的所有网格物体移离 如您所见，从边界框的中心开始。爆炸按钮适用于我所有的网格 对象，但内爆按钮不会将我的网格物体带到先前的位置。也许物理学是问题，我希望任何人都能帮忙。

  function explodeObjects() {

    var boundingbox = new THREE.Box3();

    for (var i = 0; i < scene.children.length; i++) {
        if (scene.children[i] instanceof THREE.Mesh) {
            var mesh = scene.children[i];
            var position = scene.children[i].position;
            var distance = 5;
            var direction = position.clone().normalize();
            pointNew = position.clone().addScaledVector(direction,distance);
            var x = Math.trunc(pointNew.x,);
            var y = Math.trunc(pointNew.y);
            var z = Math.trunc(pointNew.z);
            stepToExplode(mesh,x,y,z);

        }
    }

    function stepToExplode(mesh,z) {
        var tween = new TWEEN.Tween(mesh.position).to({
            x: x,y: y,z: z
        },2000).start();
        tween.easing(TWEEN.Easing.Linear.None);
    }

}

function implodeObjects() {

    var boundingbox = new THREE.Box3();

    for (var i = 0; i < scene.children.length; i++) {
        if (scene.children[i] instanceof THREE.Mesh) {
            boundingbox.expandByObject(scene.children[i]);
        }
    }

    for (var i = 0; i < scene.children.length; i++) {
        if (scene.children[i] instanceof THREE.Mesh) {
            var from = boundingbox.getcenter(new THREE.Vector3());
            var mesh = scene.children[i];
            var position = scene.children[i].position;
            var distance = 5;
            var direction = position.clone().normalize();
            var pointNew = position.clone().addScaledVector(direction,);
            var y = Math.trunc(pointNew.y);
            var z = Math.trunc(pointNew.z);
            stepToImplode(from,mesh,z)
        }
    }

    function stepToImplode(from,z) {
        var tween2 = new TWEEN.Tween(mesh.position).to({
            x: mesh.position.x - x,y: mesh.position.y - y,z: mesh.position.z - z
        },2000).start();
        tween2.easing(TWEEN.Easing.Linear.None);

    }

}