1GLUBEGINPOLYGON(3G)              OpenGL Manual             GLUBEGINPOLYGON(3G)
2
3
4

NAME

6       gluBeginPolygon - delimit a polygon description
7

C SPECIFICATION

9       void gluBeginPolygon(GLUtesselator* tess);
10

C SPECIFICATION

12       void gluEndPolygon(GLUtesselator* tess);
13

PARAMETERS

15       tess
16           Specifies the tessellation object (created with gluNewTess()).
17

DESCRIPTION

19       gluBeginPolygon and gluEndPolygon() delimit the definition of a
20       nonconvex polygon. To define such a polygon, first call
21       gluBeginPolygon. Then define the contours of the polygon by calling
22       gluTessVertex() for each vertex and gluNextContour() to start each new
23       contour. Finally, call gluEndPolygon() to signal the end of the
24       definition. See the gluTessVertex() and gluNextContour() reference
25       pages for more details.
26
27       Once gluEndPolygon() is called, the polygon is tessellated, and the
28       resulting triangles are described through callbacks. See
29       gluTessCallback() for descriptions of the callback functions.
30

NOTES

32       This command is obsolete and is provided for backward compatibility
33       only. Calls to gluBeginPolygon are mapped to gluTessBeginPolygon()
34       followed by gluTessBeginContour(). Calls to gluEndPolygon() are mapped
35       to gluTessEndContour() followed by gluTessEndPolygon().
36

EXAMPLE

38       A quadrilateral with a triangular hole in it can be described like
39       this:
40
41           gluBeginPolygon(tobj);
42              gluTessVertex(tobj, v1, v1);
43              gluTessVertex(tobj, v2, v2);
44              gluTessVertex(tobj, v3, v3);
45              gluTessVertex(tobj, v4, v4);
46           gluNextContour(tobj, GLU_INTERIOR);
47              gluTessVertex(tobj, v5, v5);
48              gluTessVertex(tobj, v6, v6);
49              gluTessVertex(tobj, v7, v7);
50           gluEndPolygon(tobj);
51
52
53

SEE ALSO

55       gluNewTess(), gluNextContour(), gluTessBeginContour(),
56       gluTessBeginPolygon(), gluTessCallback(), gluTessVertex()
57

59       Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
60       under the SGI Free Software B License. For details, see
61       http://oss.sgi.com/projects/FreeB/.
62

AUTHORS

64       opengl.org
65
66
67
68opengl.org                        07/13/2018               GLUBEGINPOLYGON(3G)
Impressum