Package gov.nasa.worldwind.util

Class PolygonTessellator2

java.lang.Object

gov.nasa.worldwind.util.PolygonTessellator2

public class PolygonTessellator2
extends java.lang.Object

TODO: Combine these capabilities into PolygonTessellator with support for pattern used by ShapefileExtrudedPolygons. TODO: Keep the combined class in package gov.nasa.worldwind.util.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	PolygonTessellator2.TessCallbackAdapter

Field Summary

Fields

Modifier and Type	Field	Description
protected java.nio.IntBuffer	boundaryIndices
protected double[]	clip
protected double[]	coords
protected java.nio.IntBuffer	interiorIndices
protected boolean	isBoundaryEdge
protected double[]	offset
protected Range	polygonVertexRange
protected int	prevClipCode
protected com.jogamp.opengl.glu.GLUtessellator	tess
protected float[]	vertex
protected int	vertexStride
protected java.nio.FloatBuffer	vertices

Constructor Summary

Constructors

Constructor	Description
PolygonTessellator2()

Method Summary

Modifier and Type	Method	Description
void	addVertex(double x, double y, double z)
void	beginContour()
void	beginPolygon()
protected int	clipCode(double x, double y, double z)	Computes a 4-bit code indicating the vertex's location in the 9 cell grid defined by the clip bounds and the eight adjacent spaces defined by extending the min/max boundaries to infinity.0 indicates that the vertex is inside the clip bounds.
void	endContour()
void	endPolygon()
int	getBoundaryIndexCount()
java.nio.IntBuffer	getBoundaryIndices(java.nio.IntBuffer buffer)
int	getInteriorIndexCount()
java.nio.IntBuffer	getInteriorIndices(java.nio.IntBuffer buffer)
Range	getPolygonVertexRange()
int	getVertexCount()
java.nio.FloatBuffer	getVertices(java.nio.FloatBuffer buffer)
protected void	putBoundaryIndex(int i)
protected void	putInteriorIndex(int i)
protected int	putVertex(double[] coords, int pos)
void	reset()
void	resetIndices()
void	setPolygonClipCoords(double xMin, double xMax, double yMin, double yMax)
void	setPolygonNormal(double x, double y, double z)
void	setVertexOffset(double x, double y, double z)
void	setVertexStride(int stride)
protected void	tessBegin(int type)
protected void	tessCombine(double[] coords, java.lang.Object[] vertexData, float[] weight, java.lang.Object[] outData)
protected void	tessEdgeFlag(boolean boundaryEdge)
protected void	tessEnd()
protected void	tessVertex(java.lang.Object vertexData)

Methods inherited from class java.lang.Object

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

Field Detail

tess

protected com.jogamp.opengl.glu.GLUtessellator tess

vertices

protected java.nio.FloatBuffer vertices

interiorIndices

protected java.nio.IntBuffer interiorIndices

boundaryIndices

protected java.nio.IntBuffer boundaryIndices

polygonVertexRange

protected Range polygonVertexRange

vertexStride

protected int vertexStride

isBoundaryEdge

protected boolean isBoundaryEdge

coords

protected double[] coords

offset

protected double[] offset

clip

protected double[] clip

vertex

protected float[] vertex

prevClipCode

protected int prevClipCode

Constructor Detail

PolygonTessellator2

public PolygonTessellator2()

Method Detail

getVertexCount

public int getVertexCount()

getVertices

public java.nio.FloatBuffer getVertices(java.nio.FloatBuffer buffer)

getInteriorIndexCount

public int getInteriorIndexCount()

getInteriorIndices

public java.nio.IntBuffer getInteriorIndices(java.nio.IntBuffer buffer)

getBoundaryIndexCount

public int getBoundaryIndexCount()

getBoundaryIndices

public java.nio.IntBuffer getBoundaryIndices(java.nio.IntBuffer buffer)

getPolygonVertexRange

public Range getPolygonVertexRange()

reset

public void reset()

resetIndices

public void resetIndices()

setPolygonNormal

public void setPolygonNormal(double x,
                             double y,
                             double z)

setPolygonClipCoords

public void setPolygonClipCoords(double xMin,
                                 double xMax,
                                 double yMin,
                                 double yMax)

setVertexStride

public void setVertexStride(int stride)

setVertexOffset

public void setVertexOffset(double x,
                            double y,
                            double z)

beginPolygon

public void beginPolygon()

beginContour

public void beginContour()

addVertex

public void addVertex(double x,
                      double y,
                      double z)

endContour

public void endContour()

endPolygon

public void endPolygon()

tessBegin

protected void tessBegin(int type)

tessEdgeFlag

protected void tessEdgeFlag(boolean boundaryEdge)

tessVertex

protected void tessVertex(java.lang.Object vertexData)

tessEnd

protected void tessEnd()

tessCombine

protected void tessCombine(double[] coords,
                           java.lang.Object[] vertexData,
                           float[] weight,
                           java.lang.Object[] outData)

putVertex

protected int putVertex(double[] coords,
                        int pos)

putInteriorIndex

protected void putInteriorIndex(int i)

putBoundaryIndex

protected void putBoundaryIndex(int i)

clipCode

protected int clipCode(double x,
                       double y,
                       double z)

Computes a 4-bit code indicating the vertex's location in the 9 cell grid defined by the clip bounds and the eight adjacent spaces defined by extending the min/max boundaries to infinity.0 indicates that the vertex is inside the clip bounds.

Parameters:

x - The x coordinate for computation.

y - The x coordinate for computation.

z - The x coordinate for computation.

Returns:

The vertex code.