glupartialdisk(3G) — IRIX 6.5.3f



gluPartialDisk(3G)             OpenGL Reference             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 +y
     axis, 90 degrees along the +x axis, 180 along the -y axis, and 270 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 GLUOUTSIDE, 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).



                                                                        Page 1



gluPartialDisk(3G)             OpenGL Reference             gluPartialDisk(3G)



SEE ALSO
     gluCylinder, gluDisk, gluNewQuadric, gluQuadricOrientation,
     gluQuadricTexture, gluSphere




















































                                                                        Page 2

Museum