Does anyone have a better way to rotate a sprite with one finger? My problem is that I can not get the sprite to stop rotating after it has been fully rotated twice and I flip my screen 180 degree periodcally (self.rotation = 180;) then flip it back (self.rotation = 0). But, when I flip it to 180 degrees the sprite will not rotate properly.
Any one have any better ideas than this?
CGFloat gRotation;
- (void)update:(ccTime)delta
{
g.rotation = gRotation;
}
- (void)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInView:[touch view]];
location = [[CCDirector sharedDirector] convertToGL:location];
if (CGRectContainsPoint(g.boundingBox, location))
{
CGPoint firstLocation = [touch previousLocationInView:[touch view]];
CGPoint location = [touch locationInView:[touch view]];
CGPoint touchingPoint = [[CCDirector sharedDirector] convertToGL:location];
CGPoint firstTouchingPoint = [[CCDirector sharedDirector] convertToGL:firstLocation];
CGPoint firstVector = ccpSub(firstTouchingPoint, g.position);
CGFloat firstRotateAngle = -ccpToAngle(firstVector);
CGFloat previousTouch = CC_RADIANS_TO_DEGREES(firstRotateAngle);
CGPoint vector = ccpSub(touchingPoint, g.position);
CGFloat rotateAngle = -ccpToAngle(vector);
CGFloat currentTouch = CC_RADIANS_TO_DEGREES(rotateAngle);
gRotation += currentTouch - previousTouch;
}
}
Thanks
EDIT:
I went in to GameConfig.h and changed #define GAME_AUTOROTATION kGameAutorotationUIViewController
to #define GAME_AUTOROTATION kGameAutorotationNone
Then, went in to AppDelegate.m and changed #if GAME_AUTOROTATION == kGameAutorotationUIViewController
to #if GAME_AUTOROTATION == kGameAutorotationNone
That fixed the sprite's rotation when I flipped the screen, but I am still having problems stopping the sprite's rotation after two full rotations.