Tao.OpenGl SDK Documentation

Glu.gluPartialDisk Method 

Draws an arc of a disk.

[Visual Basic]
Public Shared Sub gluPartialDisk( _
   ByVal quad As GLUquadric, _
   ByVal innerRadius As Double, _
   ByVal outerRadius As Double, _
   ByVal slices As Integer, _
   ByVal loops As Integer, _
   ByVal startAngle As Double, _
   ByVal sweepAngle As Double _
)
[C#]
public static void gluPartialDisk(
   GLUquadric quad,
   double innerRadius,
   double outerRadius,
   int slices,
   int loops,
   double startAngle,
   double sweepAngle
);

Parameters

quad
A quadric object (created with gluNewQuadric).
innerRadius
The inner radius of the partial disk (can be zero).
outerRadius
The outer radius of the partial disk.
slices
The number of subdivisions around the z-axis.
loops
The number of concentric rings about the origin into which the partial disk is subdivided.
startAngle
The starting angle, in degrees, of the disk portion.
sweepAngle
The sweep angle, in degrees, of the disk portion.

Remarks

gluPartialDisk renders a partial disk on the z = 0 plane. A partial disk is similar to a full disk, except that only the subset of the disk from startAngle through startAngle + sweepAngle is included (where 0 degrees is along the +y axis, 90 degrees along the +x axis, 180 degrees along the -y axis, and 270 degrees along the -x axis).

The partial 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 partial 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 partial 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 = outerRadius, the value at (r, 0, 0) is (1.0, 0.5), at (0, r, 0) it is (0.5, 1.0), at (-r, 0, 0) it is (0.0, 0.5), and at (0, -r, 0) it is (0.5, 0.0).

See Also

Glu Class | Tao.OpenGl Namespace | gluCylinder | gluDisk | gluNewQuadric | gluQuadricOrientation | gluQuadricTexture | gluSphere