Boots – shoes – and leggings
Patent
1981-05-19
1983-08-02
Smith, Jerry
Boots, shoes, and leggings
340739, 364719, G06F 3153
Patent
active
043969895
ABSTRACT:
A method and apparatus for compactly describing an image made up of concatenated lines or filled polygons. The drawing of lines for the image begins at an initial drawing point determined in a coordinate system defined by a unit screen and proceeds from point to point with the relative coordinates of each successive point specified as a positive or negative step in the horizontal and/or the vertical direction from the previous point. The step size parameters which separately define both the amount of a change in the horizontal direction and the amount of a change in the vertical direction are initially specified in fractional parts of the unit screen and remain constant in magnitude throughout the operation. The image is reflected about the horizontal axis and about the vertical axis simply by changing the sign of the step sizes. Turning on and off the drawing process is also facilitated.
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P. Baudelaire et al., "Techniques for Interactive Raster Graphics", Computer Graphics, Quarterly Report of Siggraph-ACM, 7-1980, pp. 314-320.
Tektronix, Inc.'s 4027 Color Graphics Terminal Operator's Manual, Sep., 1978, pp. 6-7 and 6-8.
Principles of Interactive Computer Graphics, Second Edition, 1979, McGraw-Hill, Inc., pp. 20-28 and 232-239, William M. Newman and Robert F. Sproull.
Communications Research Centre, Dept. of Communications, Canada, Picture Description Instructions (PDI) for the Telidon Videotex System-CRC Technical Note No. 699-E, pp. 27-28, 34-35, H. G. Bown, C. D. O'Brien, W. Sawchuk and J. R. Storey.
Fleming James R.
Frezza William A.
Soloway Gerald S.
Bell Telephone Laboratories Incorporated
Smith Jerry
Williamson S. R.
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