Package org.lwjgl.util.glu
Class PartialDisk
java.lang.Object
org.lwjgl.util.glu.Quadric
org.lwjgl.util.glu.PartialDisk
PartialDisk.java
Created 23-dec-2003
- Author:
- Erik Duijs
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Field Summary
Fields inherited from class org.lwjgl.util.glu.Quadric
drawStyle, normals, orientation, textureFlag
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
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
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Constructor Details
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PartialDisk
public PartialDisk()Constructor for PartialDisk.
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Method Details
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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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