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POcocso2d pinch-zoom like Fieldrunners
 

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    <p>I've been trying to set up the parallax node correctly but need some help with this.</p> <p>This <a href="http://goo.gl/Piqy5" rel="nofollow">http://goo.gl/Piqy5</a> would be the frame of the game and for the parallax node area I have 3 layers: background layer (zoomable but not scrollable, z order -1) layer 1 (z order 1) layer 2 (z order 2)</p> <pre><code>//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 &amp; 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]; </code></pre> <p>I think I should fix using:</p> <pre><code>//Setting the touch delegate to my CCScene @interface GameScene : CCScene &lt;CCStandardTouchDelegate&gt; //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 &gt;= MIN_SCALE) &amp;&amp; (newScale &lt;= 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 } </code></pre> <p>Any remarks or help would be great! :)</p>
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