Boots – shoes – and leggings
Patent
1987-01-20
1990-05-29
Harkcom, Gary V.
Boots, shoes, and leggings
340729, 364521, G06F 1562
Patent
active
049300920
ABSTRACT:
Data is generated for graphically displaying objects having surfaces defined by vertex locations, each having a particular intensity. The values of electrical signals that represent the coordinates of the vertex locations and a point normal used to obtain the intensities are controlled by programming a computer to generate electrical signals that represent coordinates of the vertices. The values of each of the coordinates is in terms of an equation having parameters "s" and "t". "t" is identified and kept constant at a first amount. The coordinate equations are factored to redefine them in terms of a first constant and a variable represented by "s". The equations are sequentially solved by substituting therein a predetermined series of values for "s" to control the values of the electrical signals so that certain of the signals represent ones of the coordinated that form a first row of the vertices. The factoring and solving steps are repeated using a second amount for "t" and the same predetermined series of values for "s" so that certain electrical signals represent ones of the coordinates that form a second row of the vertices. Groups of three of the electrical signals are sequentially selected from those representing the coordinates forming the first and second rows of vertices to form a first row of triangular polygons. The factoring, solving and selection are repeated as necessary to form rows of polygons that represent the entire object for display.
REFERENCES:
patent: 4775946 (1988-10-01), Anjyo
Christiansen et al., "Conversion of Complex Contour Line Definitions into Polygonal Element Mosaics", ACM SIGGRAPH '78 Proceedings (1978).
Ganapathy et al., "A New General Triangulation Method for Planar Contours", ACM SIGGRAPH '82 Proceeding (1982).
Adams Associates, The Computer Display Review (1966), pp. II.72.0 through II.104.0.
Catmull, "A Subdivision Algorithm for Computer Display of Curved Surfaces", University of Utah, Department of Computer Science, UTEC-CSc-74-133, Dec. 1974, pp. 11-17.
Clark, James Henry, "3-D Design of Free-Form B-Spline Surfaces", Department of Computer Science, University of Utah, UTEC-CSc-74 120, Sep. 1974.
Cohen and Lee, "Fast Drawing of Curves for Computer Display", Spring Joint Computer Conference (1969), pp. 297-307.
Coons, "Surfaces for Computer-Aided Design of Space Forms," Report MAC-TR-41 (MIT, Jun. 1967).
Delott and Galimberti, "Innovative Design with Computer Graphics", ALTA Frequenza, vol. 36, No. 5 (May 1967), pp. 430-439.
Foley and VanDam, Fundamentals of Interactive Computer Graphics (Addison-Wesley, 1982).
Forgie, Document No, 700316, MIT (Jan. 1970), pp. 13+.
Forrest, "Current Developments in the Design and Production of 3-Dimensional Curved Objects", Proceedings Royal Society, (London, A321, 187-195, 1971), pp. 188+.
Forrest, "Curves for Computer Graphics," Pertinent Computer Concepts in Computer Graphics, Proceedings of the 2nd University Conf. on Computer Graphics, Ed. by Faiman and Nievergelt (1969).
Gouraud, "Continuous Shading of Curved Surfaces," IEEE Transactions on Computers, vol. C-20, No. 6 (Jun. 1971), pp. 623-629.
Gouraud, "Computer Display of Curved Surfaces," University of Utah Publication UTECH-CSc-71-113 (Jun. 1971), Computer Science Department, University of Utah.
Lee, "A Class of Surfaces for Computer Display," SJCC (1969), pp. 311+.
Lee, "Three-Dimensional Curves and Surfaces for Rapid Computer Display," AD-696176, pp. 1-121.
Sutherland et al., "A Characterization of 10 Hidden-Surface Algorithms," NTIS Document AD-773963.
Newmann and Sproull, "Principles of Interactive Computer Graphics," McGraw-Hill, 1979, pp. 303, 371, 313, 325, 334-344, 389-418).
Kelley, "A Computer Graphics Program for the Generation of Half-Tone Images with Shadows", Thesis, 1970, NTIS AD-698 124.
Weitek Brochure, WTL 1032 and WTL 1033 Processors (Copyright 1983).
Auto-trol Technology Corporation
Harkcom Gary V.
Zimmerman Mark K.
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