Modal dismiss animation about epgltransitionview HOT 1 OPEN

here is a quick dirty hack to add animation to dismiss.. update the 'done' method in FlipSideViewController as below:

• (IBAction)done {
  UIViewController *controller = delegate;
  NSObject *transition;
  transition = [[[Demo2Transition alloc] init] autorelease];
  EPGLTransitionView *glview = [[[EPGLTransitionView alloc]
  initWithView:self.view
  delegate:transition] autorelease];
  [glview prepareTextureTo:[delegate view]];
  [glview setClearColorRed:0.0
  green:0.0
  blue:0.0
  alpha:1.0];
  [glview startTransition];
  [self.delegate flipsideViewControllerDidFinish:self];
  }

But the flip animation is from right to left. I suppose Demo2Transition needs to be changed to change the flip direction, but dont know how

from epgltransitionview.