Programming With QuickTime Sprites

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Sprite Spatial Concepts

This section explains sprite spatial concepts, which you may need to understand in order to work with sprites both on the desktop (outside a QuickTime movie) and within QuickTime movies. These concepts include

• a sprite track's local coordinate system
• the source box of a sprite image
• bounding box
• a sprite's "four corners"
• registration points
• display space

Sprite Track's Local Coordinate System

Source Box

Sprite's Bounding Box

Sprites' Four Corners

Registration Points

Display Space

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