Animation.cpp

void Animation::update(sf::Time dt)
{
	sf::Time timePerFrame = mLength / mNumFrames;
	mElapsedTime += dt;

	sf::Vector2i textureBounds = mSprite.getTexture().getSize();
	sf::FloatRect textureRect = mSprite.getTextureRect();

	if (mCurrentFrame == 0)
		textureRect = sf::FloatRect(0, 0, mFrameSize.x, mFrameSize.y);
	
	while (mElapsedTime >= timePerFrame)
	{
		textureRect.left += textureRect.width;
		if (textureRect.left + textureRect.width > textureBounds.x)
		{
			textureRect.left = 0;
			textureRect.top  += textureRect.height;
		}
		mCurrentFrame = mCurrentFrame + 1 % mNumFrames;
		mElapsedtime -= timePerFrame;

		if (mCurrentFrame == 0)
			textureRect = sf::FloatRect(0, 0, mFrameSize.x, mFrameSize.y);
	}
	mSprite.setTextureRect(textureRect);
}