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c++cocos2d-x

Sprite::createWithTexture with Rect not working as expected

I'm trying to build a sprite from an image. Using Image and Texture2D class and then later creating a sprite from the texture2D.

The image I am loading is 512x512 and I expected both versions of the createWithTexture to behave the same but they don't. Here the code:

Image* image = new Image();
image->initWithImageFile(fileName);

Texture2D* texture = new Texture2D();
texture->initWithImage(image);

//If used this way everything works as expected
Sprite* spr= Sprite::createWithTexture(texture);
//If used with a Rect weird result occurrs.
Sprite* spr= Sprite::createWithTexture(texture,Rect(0,0,512,512));
spr->setAnchorPoint(Vec2(0,0));
spr->setPosition(Vec2(0,0));
spr->setScale(1.0f,1.0f);
this->addChild(spr);

Here the result of the first one using a Rect:

enter image description here

And here the Second version without a Rect:

enter image description here

Do anybody know what is happening? I need to use the method that uses the rect because I will be creating a bunch of sprites from this image in the future.

Edit1: After debugging both versions of the sprite. I have noticed that the one created without the Rect shows a rect of 0,0,240,240. Instead of 0,0,512,512 as I provided. Why 240?

Thanks in advance.

Solution

  • I managed to figure out what was happening. Cocos2D-x uses director->setContentScaleFactor and glview->setDesignResolutionSize as a way to make things easier for multi resolution/device games. When you build the Rect to get a part (or full) texture you must have into account the CC_CONTENT_SCALE_FACTOR() macro, in order to get correct target coordinates.

    This can be checked at this link: http://www.cocos2d-x.org/wiki/Multi_resolution_support

    Cheers.