Touch Coordinates without e.stageX and e.stageY

Report · Feb 09, 2013

So I have a virtual camera, and eventually I get off the stage. I used to use e.stageX and e.stageY to get the coordinates of the touch, but I cannot do that anymore because I am no longer on the stage. How do I get the coordinates of the user's touch when they are not touching the stage? Surely there is a way, because if there wasn't, I'd have to come up with some extremely - difficult equasion, right? But I want the simple way, or at least adobe can make a keyword for it, because I cannot rely on the stage for everything.

Report · Feb 09, 2013

there are also e.localX and e.localY among other properties.

Report · Feb 09, 2013

I can't seem to understand the use of e.localX and e.localY. Can you explain?

Report · Feb 09, 2013

those are the coordinates local to the event dispatching object.

so, if you had a movieclip at 400,500 and you clicked on the registration point of that movieclip:

e.stageX = 400+the movieclip's registration point's x

e.stageY = 500+the movieclip's registartion point's y

e.localX = 0;

e.localY = 0;

Report · Feb 09, 2013

Okay, I got this, so the user is dragging their finger across the screen, and then the virtual camera brings it off the stage, how would I calculate the coordinates? I tried localX and localY, but it returned a very incorrect value:

var touchX:Number;

var touchY:Number;

/* Enter Frame Event

Executes the function fl_EnterFrameHandler defined below each time the playhead moves into a new frame of the timeline.

Instructions:

1. Add your custom code on a new line after the line that says "// Start your custom code" below.

The code will execute when the playhead moves into a new timeline frame.

*/

addEventListener(Event.ENTER_FRAME, fl_EnterFrameHandler);

function fl_EnterFrameHandler(event:Event):void

{

//Start your custom code

// This example code displays the words "Entered frame" in the Output panel.

na.x = touchX;

na.y = touchY;

// End your custom code

}

Multitouch.inputMode = MultitouchInputMode.TOUCH_POINT;

but.addEventListener(TouchEvent.TOUCH_BEGIN, movesprite);

but.addEventListener(TouchEvent.TOUCH_MOVE, movespritee);

function movesprite(e:TouchEvent):void

{

touchX = e.localX;

touchY = e.localY;

}

function movespritee(e:TouchEvent):void

{

touchX = e.localX;

touchY = e.localY;

}

So, my guess is there should be an equation like 'e.stageX - vcam.x;' ?

Report · Feb 09, 2013

what's na and what is its parent?

Report · Feb 10, 2013

[edit]

I now see the movieclip NA goes toward the registration point of vcam a bit.

[/edit]

Na is the movieclip that has the coordinates of touchx and touchy, also i found out that my vcam scales the stage and makes stagex and stagey return the wrong value even when on the stage

So here's my problem: somewhere in this code, it copies the bitmap data of the stage and scales it, so I'm unable to get the right coordinates:

visible=false;

parent.cacheAsBitmap=true;

////////////////////////////////////////////////////////////////////////////

// Get stage width and height //////////////////////////////////////////////

var oldScaleMode:String=stage.scaleMode;

stage.scaleMode="exactFit";

var sW:Number=stage.stageWidth;

var sH:Number=stage.stageHeight;

stage.scaleMode=oldScaleMode;

////////////////////////////////////////////////////////////////////////////

// Get Vcam width and height ///////////////////////////////////////////////

var bounds_obj:Object=this.getBounds(this);

var camH:Number=bounds_obj.height;

var camW:Number=bounds_obj.width;

////////////////////////////////////////////////////////////////////////////

// Creat Point for dynamic registration point //////////////////////////////

var rp:Point=new Point(x,y);

////////////////////////////////////////////////////////////////////////////

// Add Event Listeners /////////////////////////////////////////////////////

addEventListener(Event.ENTER_FRAME,camControl);

addEventListener(Event.REMOVED_FROM_STAGE,reset);

////////////////////////////////////////////////////////////////////////////

// Create BitmapData ///////////////////////////////////////////////////////

var bmp:Bitmap;

var myBitmapData:BitmapData=new BitmapData(sW,sH,true,0);

bmp=new Bitmap(myBitmapData);

camControl();

stage.addChild(bmp);

////////////////////////////////////////////////////////////////////////////

function camControl(...event):void {

parent.visible=true;

////////////////////////////////////////////////////////////////////////////

// Move the registration point to the vCams current position ///////////////

rp.x=x;

rp.y=y;

////////////////////////////////////////////////////////////////////////////

// Gets the current scale of the vCam //////////////////////////////////////

var h:Number=camH * scaleY;

var w:Number=camW * scaleX;

////////////////////////////////////////////////////////////////////////////

// Gets the stage to vCam scale ratio //////////////////////////////////////

var _scaleY:Number=sH / h;

var _scaleX:Number=sW / w;

////////////////////////////////////////////////////////////////////////////

// Positions the parent ////////////////////////////////////////////////////

x2=w / 2 * _scaleX;

y2=h / 2 * _scaleY;

scaleX2=_scaleX;

scaleY2=_scaleY;

rotation2=- rotation;

////////////////////////////////////////////////////////////////////////////

// Draw bitmap of parent////////////////////////////////////////////////////

myBitmapData.lock();

myBitmapData.fillRect(myBitmapData.rect,0x00);

myBitmapData.unlock();

myBitmapData.draw(stage);

////////////////////////////////////////////////////////////////////////////

// Apply vCam filters to bitmap ////////////////////////////////////////////

bmp.filters=this.filters;

bmp.transform.colorTransform=this.transform.colorTransform;

parent.visible=false;

}

function reset(e:Event):void {

////////////////////////////////////////////////////////////////////////////

// Cleans up data for garbage collection ///////////////////////////////////

removeEventListener(Event.ENTER_FRAME,camControl);

removeEventListener(Event.REMOVED_FROM_STAGE,reset );

stage.removeChild(bmp);

myBitmapData.dispose();

bmp=null;

////////////////////////////////////////////////////////////////////////////

// Resets parent properties ////////////////////////////////////////////////

parent.scaleX=1;

parent.scaleY=1;

parent.x=0;

parent.y=0;

parent.rotation=0;

parent.visible=true;

}

function set x2(value:Number):void {

var p:Point=parent.parent.globalToLocal(parent.localToGlobal(rp));

parent.x+= value - p.x;

}

function get x2():Number {

var p:Point=parent.parent.globalToLocal(parent.localToGlobal(rp));

return p.x;

}

function set y2(value:Number):void {

var p:Point=parent.parent.globalToLocal(parent.localToGlobal(rp));

parent.y+= value - p.y;

}

function get y2():Number {

var p:Point=parent.parent.globalToLocal(parent.localToGlobal(rp));

return p.y;

}

function get scaleX2():Number {

return parent.scaleX;

}

function set scaleX2(value:Number):void {

setProperty2("scaleX",value);

}

function get scaleY2():Number {

return parent.scaleY;

}

function set scaleY2(value:Number):void {

setProperty2("scaleY",value);

}

function get rotation2():Number {

return parent.rotation;

}

function set rotation2(value:Number):void {

setProperty2("rotation",value);

}

function setProperty2(prop:String,n:Number):void {

var a:Point=parent.parent.globalToLocal(parent.localToGlobal(rp));

parent[prop]=n;

var b:Point=parent.parent.globalToLocal(parent.localToGlobal(rp));

parent.x-= b.x - a.x;

parent.y-= b.y - a.y;

}

Report · Feb 10, 2013

that's more code than i can correct in a forum.

Report · Feb 10, 2013

I'm not asking you to correct it, I'm just showing what's in my virtual camera code that I'm trying to look for a code that's scaling the stage that I can change so it doesn't affect my touch events.

Report · Feb 10, 2013

Here, watch this video, you'll understand much better about my problem:

http://www.youtube.com/embed/jkk0k6HvDa4