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Originally Posted by ThunderPX
The hotspot also works to make an animation fluidly; for example, if you put the hotspot on Jazz's eye in one frame, then on Jazz's foot in the next, then Jazz's foot will be where Jazz's eye was before.
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This is precisely correct. Because the different frames actually have different dimensions (due to compression and stuff), the hotspot is the key to where the frames actually link up. Also, the sprite is drawn relative to the hotspot, which is why you see the face icons (SetID 39) as having bottom-left hotspot, because that's where the sprite "starts its drawing". Well, in actual fact you can't see the hotspot, but you can imagine where it is.
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