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
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 |
PartialDisk
public PartialDisk()
- Constructor for PartialDisk.
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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