mSpriteChicken = new TextureGenerator();
mSpriteChicken->setSize(888, 770); // mTextureWidth, mTextureHeight
mSpriteChicken->setSpriteSize(148, 110); // mSpriteWidth, mSpriteHeight
mSpriteChicken->setMaxFrames(42);

int TextureGenerator::getFrameIndex() {

    return 1;
}

const float tw = float(mSpriteWidth) / mTextureWidth;
const float th = float(mSpriteHeight) / mTextureHeight;
const int numPerRow = mTextureWidth / mSpriteWidth;
const int numPerColumn = mTextureHeight / mSpriteHeight;

const float tx = (getFrameIndex() % numPerRow) * tw;
const float ty = (getFrameIndex() / numPerRow + 1) * th;