Programming With QuickTime Sprites
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Display space, shown in Figure 0-11 , refers to the pixels drawn in a window. In order to determine the area that a sprite is drawn to in display space, its registration point is first applied to its source matrix. This result is concatenated with its track's matrix and then concatenated with its movie's matrix.
Figure 11 A sprite display space and movie matrix identity
Figure 0-12 shows a movie matrix scaled down to one-half size.
Figure 12 A movie matrix scaled down to one-half size
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