跟随相机的线路

Question

如何在摄像机视图后面创建一条线？请参见图片中的示例：

SEE THE IMAGE EXAMPLE HERE

（红线是我想要生成的，蓝点是相机。）

我有这个生成线的代码，我也有鼠标移动：

var material = new THREE.LineBasicMaterial({
    color: 0xff0000,
    linewidth: 5
});

var geometry = new THREE.Geometry();
geometry.vertices.push(
    new THREE.Vector3( 0, 5, 0 ),
    new THREE.Vector3( 5, 0, 0 )
);

var LINHATARGET = new THREE.Line( geometry, material );
LINHATARGET.position.x = 1;
LINHATARGET.position.y = 0;
LINHATARGET.position.z = 0;
scene.add( LINHATARGET );

Answer 1

快速解决方案：

scene.add(camera);
camera.add(line);
line.position.z = -1.0; // put the line in front of the camera

将作为孩子的线条添加到相机中将使其跟随其移动。

看看this fiddle。