gluDisk

The gluDisk function draws a disk.

void gluDisk(
  GLUquadricObj * qobj,   
  GLdouble innerRadius,   
  GLdouble outerRadius,   
  GLint slices,           
  GLint loops             
);
 

Parameters

qobj

The quadric object (created with gluNewQuadric).

innerRadius

The inner radius of the disk (may be zero).

outerRadius

The outer radius of the disk.

slices

The number of subdivisions around the z-axis.

loops

The number of concentric rings about the origin into which the disk is subdivided.

Remarks

The gluDisk function renders a disk on the z = 0 plane. The disk has a radius of outerRadius, and contains a concentric circular hole with a radius of innerRadius. If innerRadius 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 positive 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 positive z-axis.

If texturing is turned on (with gluQuadricTexture), texture coordinates are generated linearly such that where r = outerRadius, 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).

QuickInfo

  Windows NT: Use version 3.5 and later.
  Windows: Use Windows 95 and later.
  Windows CE: Unsupported.
  Header: Declared in glu.h.
  Import Library: Link with glu32.lib.

See Also

gluCylinder, gluNewQuadric, gluPartialDisk, gluQuadricTexture, gluSphere