Cocos2dx : How to stop CCFollow moving the ParallaxNode and making background black

Question

I am trying to follow my heroSprite using CCFollow, but there are two erratic behaviors that are happening .

I am making the camera follow my sprite as follows :

startSprite = CCSprite::createWithSpriteFrameName("santa_001.png"); startSprite->setPosition(ccp (size.width / 5 , size.height / 2 )); this->addChild(startSprite,1); this->runAction(CCFollow::create(heroSprite, CCRectMake(0, 0, size.width, size.height * 2)));

Now, what happens is :

a) The background Parallax Node consisting of different sprites and moving at different speed are also moving in "upward" direction when the heroSprite jumps upward. I want to keep this sprites at their original position and not move upward with the heroSprite. How do I do that ?

voidNode = CCParallaxNodeExtras::node();

voidNode->addChild(pSpriteGrass, 2, ccp(3.0f,0), ccp(0, size.height/10 - 50) );
voidNode->addChild(pSpriteGrass02, 3, ccp(3.0f,0), ccp(size.width - 10 , size.height/10 - 50) ); voidNode->addChild(pSprite, 1, ccp(1.0f,0), ccp(0, size.height/10 - 50) ); voidNode->addChild(pSprite02, 0, ccp(1.0f,0), ccp(size.width - 10, size.height/10 - 50) );

voidNode->addChild(pSpriteSky02, 0, ccp(0.6f,0), ccp(0, size.height /2 + 75) ); voidNode->addChild(pSpriteSky, 1, ccp(0.6f,0), ccp(size.width, size.height /2 + 75) );

voidNode->addChild(pSpriteStars, 2, ccp(2.0f,0), ccp(0, size.height - 110) ); voidNode->addChild(pSpriteStars02, 3, ccp(2.0f,0), ccp(size.width - 10, size.height - 110) );

voidNode->addChild(pSpriteClouds, 4, ccp(1.2f,0), ccp(0, size.height - 110) ); voidNode->addChild(pSpriteClouds02, 5, ccp(1.2f,0), ccp(size.width - 10, size.height - 110) );

CCActionInterval* go = CCMoveBy::create(25, ccp(-1000,0) ); CCSequence* seq = CCSequence::create(go, NULL); voidNode->runAction( (CCRepeatForever::create(seq) ));
this->addChild( voidNode, 0 );

b) When the hero moves upward, the screen which is initialized with white color turns black for sometime when the heroSprite is jumping. When it comes down the screen becomes white again. How do I make the upward portion of the screen white as well ?

CC_BREAK_IF(! CCLayerColor::initWithColor( ccc4(255,255,255,255) ) );

Any suggestions or pointers would be helpful . Thanks

UPDATE FOR PART B :

Through "Smugbit Studios" suggestion, I changed

initWithColor:ccc4(255,255,255,255);

to

initWithColor(ccc4(255, 255, 255, 255), size.width, size.height * 2);

and it solves my problem . I am still looking to solve answer part a .

Lorenzo Linarducci Lorenzo Linarducci · Accepted Answer · 2013-04-19T21:37:25

For a, set the bounds of the CCFollow to whatever you want the max height to be - in this case, I believe it would just be size.height, so:

this->runAction(CCFollow::create(heroSprite, CCRectMake(0, 0, size.width, size.height)));

For b, I suspect your main init of "this" is a CCLayer, and not a CCLayerColor. Just change what you are subclassing to CCLayerColor, and change the new init to:

initWithColor:ccc4(255,255,255,255)

Edit: Correction for answer B - you also need to define the layer size. If not defined, it is set to the screen size, but it would appear you are trying to go beyond the height of the screen. In that case, use:

initWithColor(ccc4(255, 255, 255, 255), width, height)

Where height is the maximum height you will display - likely (size.height*2).

Cocos2dx : How to stop CCFollow moving the ParallaxNode and making background black

1 Answers