Cocso2D пинч-зум, как Fieldrunners - PullRequest
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Cocso2D пинч-зум, как Fieldrunners

1 голос
/ 09 марта 2012

Я пытался правильно настроить узел параллакса, но мне нужна помощь с этим.

Это http://goo.gl/Piqy5 будет фреймом игры, а для области узла параллакса у меня есть 3 слоя: фоновый слой (масштабируемый, но не прокручиваемый, z порядок -1) слой 1 (z порядок 1) слой 2 (z порядок 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, я должен исправить, используя: 

//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 будут великолепны! :)

1 Ответ

1 голос
/ 18 апреля 2012

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

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