org.lwjgl.util.glu

Class PartialDisk

java.lang.Object

org.lwjgl.util.glu.Quadric

org.lwjgl.util.glu.PartialDisk

public class PartialDisk
extends Quadric

PartialDisk.java Created 23-dec-2003

Author:

Erik Duijs

Field Summary

Fields inherited from class org.lwjgl.util.glu.Quadric

drawStyle, normals, orientation, textureFlag

Constructor Summary

Constructors

Constructor and Description
PartialDisk() Constructor for PartialDisk.

Method Summary

Methods

Modifier and Type	Method and Description
void	draw(float innerRadius, float outerRadius, int slices, int loops, float startAngle, float sweepAngle) renders a partial disk on the z=0 plane.

Methods inherited from class org.lwjgl.util.glu.Quadric

cos, getDrawStyle, getNormals, getOrientation, getTextureFlag, normal3f, setDrawStyle, setNormals, setOrientation, setTextureFlag, sin, TXTR_COORD

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PartialDisk

public PartialDisk()

Constructor for PartialDisk.

Method Detail

draw

public void draw(float innerRadius,
        float outerRadius,
        int slices,
        int loops,
        float startAngle,
        float sweepAngle)

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 along the -y axis, and 270 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 zero, 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.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, 0.5), 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).