gluPartialDisk man page on RedHat
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GLUPARTIALDISK(3G) OpenGL Manual GLUPARTIALDISK(3G)
NAME
gluPartialDisk - draw an arc of a disk
C SPECIFICATION
void gluPartialDisk(GLUquadric* quad, GLdouble inner, GLdouble outer,
GLint slices, GLint loops, GLdouble start,
GLdouble sweep);
PARAMETERS
quad
Specifies a quadrics object (created with gluNewQuadric()).
inner
Specifies the inner radius of the partial disk (can be 0).
outer
Specifies the outer radius of the partial disk.
slices
Specifies the number of subdivisions around the z axis.
loops
Specifies the number of concentric rings about the origin into
which the partial disk is subdivided.
start
Specifies the starting angle, in degrees, of the disk portion.
sweep
Specifies the sweep angle, in degrees, of the disk portion.
DESCRIPTION
gluPartialDisk renders a partial disk on the z = 0 plane. A partial
disk is similar to a full disk, except that only the subset of the disk
from start through start + sweep is included (where 0 degrees is along
the +\f2y\f axis, 90 degrees along the +x axis, 180 degrees along the
\-y axis, and 270 degrees along the \-x axis).
The partial disk has a radius of outer and contains a concentric
circular hole with a radius of inner. If inner is 0, then no hole is
generated. The partial disk is subdivided around the z axis into slices
(like pizza slices) and also about the z axis into rings (as specified
by slices and loops, respectively).
With respect to orientation, the +z side of the partial disk is
considered to be outside (see gluQuadricOrientation()). This means that
if the orientation is set to GLU_OUTSIDE, then any normals generated
point along the +z axis. Otherwise, they point along the \-z axis.
If texturing is turned on (with gluQuadricTexture()), texture
coordinates are generated linearly such that where r = outer, the value
at (r, 0, 0) is (1.0, 0.5), at (0, r, 0) it is (0.5, 1.0), at (\-r, 0,
0) it is (0.0, 0.5), and at (0, \-r, 0) it is (0.5, 0.0).
SEE ALSO
gluCylinder(), gluDisk(), gluNewQuadric(), gluQuadricOrientation(),
gluQuadricTexture(), gluSphere()
COPYRIGHT
Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
under the SGI Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/.
AUTHORS
opengl.org
opengl.org 03/16/2013 GLUPARTIALDISK(3G)
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