AS3：图形 API 未按预期工作

Question

我一直在做一个 AS3 项目，但由于我通常使用 php/javascript，这种语言对我来说是新的，我遇到了一个我不知道如何解决的问题。我想我会在这里问它，因为它可能超级简单，我只是错过了一些（真的）基本的东西。

这是我在外部 AS3 文件中的代码：

package  {

    import flash.display.MovieClip;
    import flash.events.MouseEvent;
    import flash.events.Event;
    import flash.display.Shape;
    import flash.display.Graphics;

    public class lightstage_debug extends MovieClip {
        //create drag functions for tools
        public function dragMirror1(event:MouseEvent):void
        {
            if (stage.contains(mirror1))
            {
                mirror1.startDrag();
            }
        }
        public function releaseMirror1(event:MouseEvent):void
        {
            if (stage.contains(mirror1))
            {
                mirror1.stopDrag();
            }

        }
        /*********************************************************************************************
        TODO: make mirror2, mirror3 etc drag function exist in code even when those mirrors don't exist
        **********************************************************************************************/
        public function reCheck(event:Event):void
        {
            //BEGIN LEVEL 1 RECHECK//
            if (level.number == 1)
            {
                //check if mirror1 is touching line1
                if (mirror1.hitTestObject(line1))
                {
                    //redraw line 1 to stop at mirror1
                    /*************************************************************************************
                    TODO: MAKE LINE1 END **EXACTLY** WHERE MIRROR1 TOUCHES IT
                    **************************************************************************************/
                    line1.graphics.clear();
                    line1.graphics.lineStyle(2,0x000000,1);
                    line1.graphics.moveTo(0,200);
                    line1.graphics.lineTo((mirror1.x + (mirror1.width/2)),200);

                    //redraw line 2 to start at mirror1
                    line2.graphics.clear();
                    line2.graphics.lineStyle(2,0x000000,1);
                    line2.graphics.moveTo((mirror1.x + (mirror1.width/2)),200);
                    line2.graphics.lineTo(0,200);

                    lines.addChild(line2);

                    //show line2
                    //line2.visible = true;
                    //line2.alpha = 100;
                    trace('line didnt appear');

                }
                //run this if line1 is not touching mirror1
                else
                {
                    //redraw line 1 to reach the end of the stage
                    line1.graphics.clear();
                    line1.graphics.lineStyle(2,0x000000,1);
                    line1.graphics.moveTo(0,200);
                    line1.graphics.lineTo(550,200);

                    //hide line2
                    //line2.alpha = 0;
                }
            }
            //END LEVEL 1 RECHECK//
        }
    }

}

这是我的 .FLA 文件中的代码：

//import libraries
import flash.display.Shape;
import flash.display.MovieClip;
import flash.events.MouseEvent;
import flash.events.Event;
import flash.display.Graphics;

//create variables
var globe1:MovieClip = new globe;
var mirror1:MovieClip = new mirror;

//create display containers
var lines:MovieClip = new MovieClip;
var mirrors:MovieClip = new MovieClip;
var concaves:MovieClip = new MovieClip;
var convexes:MovieClip = new MovieClip;
var globes:MovieClip = new MovieClip;

//create shapes for this level
var line1:Shape = new Shape;
var line2:Shape = new Shape;

//add display containers to the stage
addChild(lines);
addChild(mirrors);
addChild(concaves);
addChild(convexes);
addChild(globes);

//create level object to store level properties
var level:Object = new Object;

//create scene properties
level.mirrors = 1;
level.concaves = 0;
level.convexes = 0;
level.globes = 1;
level.number = 1;

//add all lines to the stage
lines.addChild(line1);
lines.addChild(line2);

//draw line1
line1.graphics.clear();
line1.graphics.lineStyle(2, 0x000000, 1);
line1.graphics.moveTo(0,200);
line1.graphics.lineTo(550, 200);

//4DEBUG: testing to see why line2 dosent appear
line2.graphics.clear();
//add mirrors
mirrors.addChild(mirror1);

//add concaves

//add convexes

//add globes
globes.addChild(globe1);

//position mirrors
mirror1.x = 340;
mirror1.y = 300;

//position globes
globe1.x = 125;
globe1.y = 50;

//create listeners
mirror1.addEventListener(MouseEvent.MOUSE_DOWN, dragMirror1);
mirror1.addEventListener(MouseEvent.MOUSE_UP, releaseMirror1);
stage.addEventListener(Event.ENTER_FRAME, reCheck);

我的舞台是空的，我现在只有一帧。地球和镜像影片剪辑在我的库中，其中包含我在代码中创建它们时使用的 AS3 链接名称。

我正在尝试创建类似于http://raphaelhennessy.com/misc/Explanation.png 中描述的内容（忽略文本“LightStage Explanation”下方的所有内容）-但我的问题是，尽管我可以将初始行（第 1 行）“缩小”并停在镜子当镜子放在线的顶部时，line2不会出现并从镜子开始，像预期的那样向上到舞台的顶部。

提前致谢，

-拉夫

Answer 1

您似乎希望 line2.graphics.lineTo(0,200); 成为 line2.graphics.lineTo((mirror1.x + (mirror1.width/2)), 0);。现在你只是在相反的方向上画线。