Labels:bird | book | reckoner | windowpane OCR: FIGURE 11.19 Block move animation uses a fundamcntally different principle than animation based on xoring. In block nove animation, an image drawn by simply writing its bytes rectangular area of display Each imagc includes blank fringe wide enough t0 cover the longest distance that image ever moves at one time. Given that restriction, as cach image is and redrawn at its new location 1 automatically erases itself from the pO location; no separate drawing step is required. (A-D Four steps in the block move animation cartwhecling Stick figure; the animated image ic shown with heavy lines pue the blank fringe shaded gray. Each time the figure is drawn at new location. the blank fringe completely erases the image ar the last location. (The erased image is shown with light lines.) Note that this ...
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