fgluDisk(3G) OpenGL Reference fgluDisk(3G)NAMEfgluDisk - draw a disk
FORTRAN SPECIFICATION
SUBROUTINE fgluDisk( CHARACTER*8 quad,
REAL*4 inner,
REAL*4 outer,
INTEGER*4 slices,
INTEGER*4 loops )
PARAMETERS
quad Specifies the quadrics object (created with fgluNewQuadric).
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.
DESCRIPTIONfgluDisk 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 fgluQuadricOrientation). 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 has been turned on (with fgluQuadricTexture), 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
fgluCylinder, fgluNewQuadric, fgluPartialDisk, fgluQuadricOrientation,
fgluQuadricTexture, fgluSphere
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