问网格沿z轴移动的顶点

EN

            var box1 = new THREE.Mesh(
                new THREE.BoxGeometry(10,10,10),
                new THREE.MeshBasicMaterial({color: 0xff0000})
            );
            scene.add(box1);

            var box2 = new THREE.Mesh(
                new THREE.BoxGeometry(10,10,10),
                new THREE.MeshBasicMaterial({color: 0x00ff00})
            );
            box2.position.set(100,100,100);
            scene.add(box2);
            var box3 = new THREE.Mesh(
                new THREE.BoxGeometry(10,10,10),
                new THREE.MeshBasicMaterial({color: 0x0000ff})
            );
            box3.position.set(100,100,100);
            scene.add(box3);

            var direction = box1.position.clone().sub(box2.position).normalize();
            var move = new THREE.Vector3(0,0,100);
            var moveCorrected = direction.multiplyScalar( move.length() );
            box3.position.add(moveCorrected);