title: Affine Transformations vs Keyframing
body: <p>This may be a silly question to a graphics guru (which I am not), but what's the difference between affine transformations and keyframing? I'm reading about the former in the iPhone cookbook, and she states that 'Affine transforms enable you to change an object's geometry by mapping that object from one view coordinate system into another'. This reminds me of when I played with Adobe After Effects, and you'd set the start, 'in between', and finishing positions, and would get a nice visual animation. They called it keyframing. So what's the difference this and affine transormations. Is it a 2D vs 3D thing? Thanks all.</p>