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gluDisk

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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).

Requirements

**  Windows NT/2000:** Requires Windows NT 3.5 or later.
**  Windows 95/98:** Requires Windows 95 or later. Available as a redistributable for Windows 95.
**  Header:** Declared in Glu.h.
**  Library:** Use Glu32.lib.

See Also

gluCylinder, gluNewQuadric, gluPartialDisk, gluQuadricTexture, gluSphere