Unity 3d 后代生成LineRenderer线

var aMaterial:Material;
private var mLine:LineRenderer;
function Start ()
{

    mLine = this.gameObject.AddComponent(LineRenderer);
    mLine.SetWidth(5, 5);
    mLine.SetVertexCount(300);
    mLine.SetColors (Color.yellow,Color.yellow);
    mLine.material = aMaterial;//材质
    mLine.material.color = Color (0, 1, 0, 0.25);
    mLine.renderer.enabled = true; //启用
}

var i:int=0;
function Update()
{
    if(i<300)
    {
        mLine.SetPosition(i,Input.mousePosition);//鼠标坐标
    }
    i++;
}