Sprite.rotation does not work if it is not initialized with a value different than 0

[Sebastiano]

create a test using this code:

package ;
import flash.display.Bitmap;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.geom.Point;
import flash.geom.Rectangle;
import flash.display.Shape;

class SpaceShip extends Sprite
{
 var _bmp:Bitmap;
 var _mouseDown:Bool;

 public function new()
 {
  super ();

  var bitmapData = nme.Assets.getBitmapData ("assets/images/bship.png");

  _bmp = new Bitmap(bitmapData);

  this.addChild(_bmp);

  this.addEventListener(Event.ENTER_FRAME, onRender);
  this.addEventListener(Event.ADDED_TO_STAGE, onStage);

  _mouseDown = false;
 }

 private function onMouseDown(evt:MouseEvent):Void
 {
  _mouseDown = true;
 }

 private function onStage(evt:Event):Void
 {
  stage.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);

  this.removeEventListener(Event.ADDED_TO_STAGE, onStage);//otherwise it is called twice

  var rect:Rectangle = _bmp.getBounds(this.parent);

  _bmp.x -= ((rect.width / 2));
  _bmp.y -= ((rect.height / 2));

  x = (stage.stageWidth / 2);
  y = (stage.stageHeight / 2);
 }

 private function onRender(evt:Event):Void
 {
  this.rotation = CalcRotation();
 }

 private function CalcRotation():Float
 {
  if (_mouseDown == false) return this.rotation;

  return 57;
 }
}

Once the mouse is clicked, instead to see a sudden change of rotation like expected, the sprite will be also translated to the corner of the screen (right down in my case);
IF the sprite rotation is initialize to 1 inside the OnStage function, then everything works as expected.

[Niel Drummond (niel-drummond)]

Because it's not a pure haxe/jeash project and uses NME, I cannot compile this as it is posted.

Is it possible that you zip your project, with Assets, with NMML file, and Source directories so I can compile it without deviating from the code you have provided ?

[Niel Drummond (niel-drummond)]

I guess the stage should be rotated properly around the center of the screen, or is the stage not supposed to fire any mouse events at all ?

[Niel Drummond (niel-drummond)]

Thanks for the bug report(s).