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 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, 0.5), 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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