keyboard function not reaching the array

[anamariaf97539161]

Good afternoon,

   I tried to rotate an array of objects with a mouse click, but it did not work for me, so I tried the keyboard instead, but the only way I get it to work is if I use the object name instead of the array. I get the following error message and I do not know how to fix it. Help/suggestions are appreciated.

airplane.rotation = rotationValue

Error #1010: A term is undefined and has no properties.

This is what I have:

stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyboardDown);

stage.addEventListener(KeyboardEvent.KEY_UP, onKeyboardUp);

addEventListener(Event.ENTER_FRAME, onEnter);

var rotationSpeed:int = 0;

var rotationValue:int = 0;

var airplane:Array = [Memphis_Belle,Pitts,Spruce_Goose,Electra]

for (var i = 0; i < airplane.length; i++)

airplane.addEventListener(MouseEvent.MOUSE_DOWN, beginDrag);

function beginDrag(event:MouseEvent):void {
event.target.startDrag();

}

stage.addEventListener(MouseEvent.MOUSE_UP, finishDrag);
function finishDrag(event:MouseEvent):void {
event.target.stopDrag();

}
function onKeyboardDown(event:KeyboardEvent):void {
if(event.keyCode == Keyboard.LEFT) {
rotationSpeed = -5;
}
if(event.keyCode == Keyboard.RIGHT)

{

rotationSpeed = 5;
}

}

function onKeyboardUp(event:KeyboardEvent):void {

if(event.keyCode == Keyboard.LEFT)

{

rotationSpeed = -0;

}
if(event.keyCode == Keyboard.RIGHT)

{
rotationSpeed = 0;
}

}
function onEnter(event:Event):void

{
rotationValue += rotationSpeed;

airplane.rotation = rotationValue;
}

[Colin Holgate]

In this part of your code:

for (var i = 0; i < airplane.length; i++)

airplane.addEventListener(MouseEvent.MOUSE_DOWN, beginDrag);

you are missing the braces. It should be:

for (var i = 0; i < airplane.length; i++){

     airplane.addEventListener(MouseEvent.MOUSE_DOWN, beginDrag);

}

In the onEnter function you are missing the for loop, it should be:

rotationValue += rotationSpeed;

for (var i = 0; i < airplane.length; i++){

    airplane.rotation = rotationValue;

}

[anamariaf97539161]

Thank you, I fixed the mistakes, but I still get the same error message:

airplane.rotation = rotationValue;

Error #1010: A term is undefined and has no properties.

[Colin Holgate]

Did you add the for loop?:

rotationValue += rotationSpeed;

for (var i = 0; i < airplane.length; i++){

    airplane.rotation = rotationValue;

}

Can you paste all of your script again?

[anamariaf97539161]

yes, I did add the for loop. Here it is with the corrections:

stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyboardDown);

stage.addEventListener(KeyboardEvent.KEY_UP, onKeyboardUp);

addEventListener(Event.ENTER_FRAME, onEnter);

var rotationSpeed:int = 0;

var rotationValue:int = 0;

var airplane:Array = [Memphis_Belle,Pitts,Spruce_Goose,Electra]

for (var i = 0; i < airplane.length; i++){
airplane.addEventListener(MouseEvent.MOUSE_DOWN, beginDrag);
}

function beginDrag(event:MouseEvent):void

     {
           event.target.startDrag();

     }

stage.addEventListener(MouseEvent.MOUSE_UP, finishDrag);

function finishDrag(event:MouseEvent):void

     {
           event.target.stopDrag();

     }

function onKeyboardDown(event:KeyboardEvent):void

     {
      if(event.keyCode == Keyboard.LEFT)

           {
            rotationSpeed = -5;
           }
if(event.keyCode == Keyboard.RIGHT)

      {

rotationSpeed = 5;
       }

}

function onKeyboardUp(event:KeyboardEvent):void

{

      if(event.keyCode == Keyboard.LEFT)

      {

           rotationSpeed = 0;

      }

      if(event.keyCode == Keyboard.RIGHT)

      {
            rotationSpeed = 0;
       }

}

function onEnter(event:Event):void

     {
       rotationValue += rotationSpeed;
      for(var i = 0; i<airplane.length; i++){
      airplane.rotation = rotationValue;

     }

[Colin Holgate]

This is missing a close brace:

function onEnter(event:Event):void

     {
       rotationValue += rotationSpeed;
      for(var i = 0; i<airplane.length; i++){
      airplane.rotation = rotationValue;

     }

should be:

function onEnter(event:Event):void

     {
       rotationValue += rotationSpeed;
      for(var i = 0; i<airplane.length; i++){
      airplane.rotation = rotationValue;

     }

}

[anamariaf97539161]

Thank you, no more errors, but the objects rotate all at the same time. Is there a focus function, so that only the selected one rotates when the keys are pressed?

I'm sorry, I am new at this.

[Colin Holgate · Accepted solution]

You only want the one that you're dragging to rotate?

In the beginDrag function you can see what target it was, with event.target.name. You could save that in a variable, and then in the onEnter function you check the name (say the variable is 'currentPlane'):

var currentPlane:String = "";

function beginDrag(event:MouseEvent):void {

       currentPlane = event.target.name;

       event.target.startDrag();

}

function onEnter(event:Event):void     {

       rotationValue += rotationSpeed;

      for(var i = 0; i<airplane.length; i++){

          if(airplane.name==currentPlane){

              airplane.rotation = rotationValue;

              break;

          }

     }

}

The break is there because you've already found the right plane.

There is a problem though in that the next different plane you drag will jump to the rotation the earlier one had reached.

[anamariaf97539161]

You are right, it does jump to the previous object position. My application also crash when I attempt to rotate the second object