Rotating sprite to face enemy

void Cannon::Update(float dt)
{	
	if (m_pTarget != nullptr && m_pSprite != nullptr)
	{
		cocos2d::Vec2 thisPosition;		
		thisPosition = m_pSprite->getPosition();
				
		m_TargetPosition = WorldManager::getInstance()->GetCenter(m_pTarget);
		
		float angle = atan2(thisPosition.x - m_TargetPosition.x, thisPosition.y - m_TargetPosition.y);
		angle = angle * (180.0f / PI);
				
		if (angle < 0)
		{
			angle += 360.0f;
		}

		m_pSprite->setRotation(angle + 180.0f);				
	}
	
	ShootTimer(dt);	
}