CCLayer setRotation update of child positions

cocos2d-x C++
#1

Hi,

I’ve got a mutable array of sprites which get added to a layer.
When i rotate the layer with setRotation the sprites move as expected, but when i read out the position of those sprites from the mutable array in the update fuction, it reads the initial possition the sprites had before the rotation.

Below is how i added the sprite to the layer first and then to the array.

gameLayers->getObjectAtIndex(gameLayer)->addChild(target);
targetArray->addObject(target);

What do i need to do in order to read the new position the sprites got after their layer was rotated?

Thanks

#2

Yeah the sprites are rotated relative to the parent layer.

You can calculate the new position yourself using code like this:

RotatePoint.x = pOrigin.x + cos(Degrees) * (pPoint.x - pOrigin.x) - sin(Degrees) * (pPoint.y - pOrigin.y);
RotatePoint.y = pOrigin.y + sin(Degrees) * (pPoint.x - pOrigin.x) + cos(Degrees) * (pPoint.y - pOrigin.y);

… I haven’t tried it but it should work.