[]关于.graphics.drawPath的问题

我init的高度是2001，为什么用graphics.drawPath高度为800时在这么下面，按理应该在中间偏上呀？
 
代码如下：Laya.init(1125, 2001);
Laya.stage.scaleMode = "exactfit";
Laya.stage.alignH = "center";       
Laya.stage.screenMode = "vertical";

var tt = new Laya.Sprite();
tt.graphics.drawPath(0, 0, [["moveTo", 0, 0],["lineTo", 200, 0],["closePath"]], {fillStyle:"#ffffff"},{strokeStyle:"#ffffff",lineWidth:5})
tt.graphics.drawPath(0, 800, [["moveTo", 0, 800],["lineTo", 200, 800],["closePath"]], {fillStyle:"#ffffff"},{strokeStyle:"#ffffff",lineWidth:5})
Laya.stage.addChild(tt);