org.lwjgl.util.glu
Class PartialDisk

java.lang.Object
  extended by org.lwjgl.util.glu.Quadric
      extended by 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
PartialDisk()
          Constructor for PartialDisk.
 
Method Summary
 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).



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