org.j3d.geom.spline
Class BezierPatchGenerator

java.lang.Object
  org.j3d.geom.GeometryGenerator
      org.j3d.geom.spline.PatchGenerator
          org.j3d.geom.spline.BezierPatchGenerator

public class BezierPatchGenerator
extends PatchGenerator

Geometry generator for generating rectangular Bezier patches.

Bezier patches of all orders are permitted. Order information is derived from the provided controlPoint coordinates. When generating a patch, the values for the coordinates are nominally provided in the X and Z plane although no explicit checking is performed to ensure that controlPoint coordinates do not self-intersect or do anything nasty. Normals are always generated as the average between the adjacent edges.

Version:

$Revision: 1.8 $

Author:

Justin Couch

Field Summary

Fields inherited from class org.j3d.geom.spline.PatchGenerator

controlPointCoordinates, controlPointWeights, depthFacetCount, normalsChanged, numDepthControlPoints, numNormalValues, numPatchValues, numTexcoordValues, numWidthControlPoints, patchChanged, patchCoordinates, patchNormals, patchTexcoords, texCoordsChanged, useControlPointWeights, widthFacetCount

Constructor Summary

BezierPatchGenerator()
Construct a new generator with default settings of 20 grid squares over the length of one surface.

BezierPatchGenerator(int widthFacets, int depthFacets)
Construct a new generator with the specified number of tessellations over the side of the patch, regardless of extents.

Method Summary

protected void

regeneratePatch() Regenerate the patch coordinate points according to the bezier surface function.

Methods inherited from class org.j3d.geom.spline.PatchGenerator

enableControlPointWeights, generate, getVertexCount, hasControlPointWeights, regenerateNormals, regenerateTexcoords, setFacetCount, setPatchControlPoints, setPatchControlPoints, setPatchControlPoints, setPatchControlPoints, setPatchControlPoints, setPatchControlPoints, setPatchControlPoints, setPatchControlPoints, setPatchWeights, setPatchWeights, setPatchWeights, setPatchWeights

Methods inherited from class org.j3d.geom.GeometryGenerator

createFaceNormal, createFaceNormal, createRadialNormal, createRadialNormal

Methods inherited from class java.lang.Object

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

Constructor Detail

BezierPatchGenerator

public BezierPatchGenerator()

Construct a new generator with default settings of 20 grid squares over the length of one surface.

BezierPatchGenerator

public BezierPatchGenerator(int widthFacets,
                            int depthFacets)

Construct a new generator with the specified number of tessellations over the side of the patch, regardless of extents.

Parameters:

widthFacets - The number of facets on the width of the patch

depthFacets - The number of facets on the width of the patch

Throws:

java.lang.IllegalArgumentException - The number of facets is less than 3

Method Detail

regeneratePatch

protected void regeneratePatch()

Regenerate the patch coordinate points according to the bezier surface function.

Specified by:

regeneratePatch in class PatchGenerator