cocso2d pinch-zoom like Fieldrunners

Question

Я пытался настроить узел параллакса правильно, но вам нужна помощь.

Это http://goo.gl/Piqy5 бы кадр из игры и для области параллакса узла У меня 3 слоев: фоновый слой (масштабируемой, но не прокручивать, г порядка -1) слой 1 (г заказ 1) слой 2 (г порядка 2)

//Adding the layers to the parallax node 
CGPoint offsetLayer = ccp(0,0); 
//background layer 
[parallaxNode addChild:backgroundLayer z:-1 parallaxRatio: ccp(0,0) positionOffset: offsetLayer]; 
//layer 1 
[parallaxNode addChild:secondParallaxLayer z:1 parallaxRatio: ccp(0.5,0) positionOffset: offsetLayer]; 
//layer 2 
[parallaxNode addChild:firstParallaxLayer z:2 parallaxRatio: ccp(1.1,0) positionOffset: offsetLayer]; 


//the pan/zoom & scroll controller 
_controller = [[CCPanZoomController controllerWithNode:baseLayer] retain]; 
_controller.boundingRect = boundingRect; 
_controller.zoomOutLimit = _controller.optimalZoomOutLimit; 
_controller.zoomInLimit = 2.0f; 
[_controller centerOnPoint:CGPointMake(screenSize.width/2.0, screenSize.height/2.0)]; 
[_controller enableWithTouchPriority:-2 swallowsTouches:YES]; 

Я думаю, что я должен исправить с помощью:

//Setting the touch delegate to my CCScene 
@interface GameScene : CCScene <CCStandardTouchDelegate> 


//and add register to touch delegate 
[[CCTouchDispatcher sharedDispatcher] addStandardDelegate:self priority:2]; 


- (CGPoint)convertPoint:(CGPoint)point fromNode:(CCNode *)node { 
    return [self convertToNodeSpace:[node convertToWorldSpace:point]]; 
} 

- (void)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { 
#define CLAMP(x,y,z) MIN(MAX(x,y),z) 
    if ([[[event allTouches] allObjects] count] == 2) { 

     UITouch* touch1 = [[[event allTouches] allObjects] objectAtIndex:0]; 
     UITouch* touch2 = [[[event allTouches] allObjects] objectAtIndex:1]; 

     // calculate scale value 
     double prevDistance = ccpDistance([touch1 previousLocationInView:[touch1 view]], [touch2 previousLocationInView:[touch2 view]]); 
     double newDistance = ccpDistance([touch1 locationInView:[touch1 view]], [touch2 locationInView:[touch2 view]]); 

     CGFloat relation = newDistance/prevDistance; 
     CGFloat newScale = self.scale * relation; 

     if ((newScale >= MIN_SCALE) && (newScale <= MAX_SCALE)) { 

      CGPoint touch1Location = [baseLayer convertTouchToNodeSpace:touch1]; 
      CGPoint touch2Location = [baseLayer convertTouchToNodeSpace:touch2]; 

      // calculate center point between two touches 
      CGPoint centerPoint = ccpMidpoint(touch1Location, touch2Location); 

      // store center point location (ScrollableView space) 
      CGPoint centerPointInParentNodeSpace = [self convertPoint:centerPoint fromNode:baseLayer]; 
      CGPoint oldPoint = ccp(centerPointInParentNodeSpace.x * (self.scale), centerPointInParentNodeSpace.y * (self.scale)); 
      self.scale = newScale; 

      CGPoint newPoint = ccp(centerPointInParentNodeSpace.x * (self.scale), centerPointInParentNodeSpace.y * (self.scale)); 
      CGPoint diff = ccp(oldPoint.x - newPoint.x , oldPoint.y - newPoint.y); 

      [baseLayer setPosition:ccp(baseLayer.position.x + (diff.x*(1/self.scale)), baseLayer.position.y + (diff.y*(1/self.scale)))]; 
     } 
    } else if ([[[event allTouches] allObjects] count] == 1) { 
     // get touch locations 
     UITouch *touch = [[event allTouches] anyObject]; 

     CGPoint touchPosition = [[CCDirector sharedDirector] convertToGL:[touch locationInView:[touch view]]]; 
     CGPoint oldPosition = [[CCDirector sharedDirector] convertToGL:[touch previousLocationInView:[touch view]]]; 

     // calculate difference in position 
     CGPoint diff = ccpSub(touchPosition, oldPosition); 
     self.position = ccpAdd(self.position, diff); 
    } 

#undef CLAMP 
} 

Любые замечания или помощь будет здорово! :)

Answer 1

Проверьте CCLayerPanZoom в расширениях Cocos2d на Github. Я использовал этот класс, чтобы включить масштабирование и панорамирование в моей игре