gluDisk(3G) OpenGL Reference gluDisk(3G)
NAME
gluDisk - draw a disk
C SPECIFICATION
void gluDisk( GLUquadric* quad,
GLdouble inner,
GLdouble outer,
GLint slices,
GLint loops )
PARAMETERS
quad Specifies the quadrics object (created with gluNewQuadric).
inner Specifies the inner radius of the disk (may be 0).
outer Specifies the outer radius of the disk.
slices Specifies the number of subdivisions around the z axis.
loops Specifies the number of concentric rings about the origin into
which the disk is subdivided.
DESCRIPTION
gluDisk renders a disk on the z = 0 plane. The 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 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 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, 0.5), at (0, r, 0) it is (0.5, 1), at (-r, 0, 0) it is (0, 0.5), and
at (0, -r, 0) it is (0.5, 0).
SEE ALSO
gluCylinder, gluNewQuadric, gluPartialDisk, gluQuadricOrientation,
gluQuadricTexture, gluSphere
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