PgPolygon ("JavaView Reference Manual")

java.lang.Object
- jv.object.PsObject
- - jv.project.PgGeometry
  - - jv.geom.PgPointSet
    - - jv.geom.PgPolygon

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, PsUpdateIf, PgGeometryIf

Direct Known Subclasses:

PgBezierCurve, PgBndPolygon, PgFunction, PgParmCurve, PgPolygonOnElementSet
```
public class PgPolygon
extends PgPointSet
```
Base class for polygons given as consecutive list of polygon vertices. The class interprets the vertices in the vertex array of its superclass PgPointSet as consecutive points of a polygon. Therefore, this class mainly consists of polygon properties, for example, polygon color, additional to the geometric information contained in its superclass.
The dimension of all points is determined as argument of the constructor and cannot be changed later. See PgPointSet for details about allocation and access.
A good starting point to obtain further insight are methods like computeEight(int) (if source code access to JavaView is available), or the tutorial applets of JavaView.

See Also:
PgPointSet, Serialized Form

Field Summary

Fields
Modifier and Type Field and Description

static int BINORMAL

static int CURVATURE_NORMAL

static int NORMAL

static int OFFSET_NORMAL
- Fields inherited from class jv.object.PsObject
  HAS_BOUNDARY_PANEL, HAS_CONFIG_PANEL, HAS_INFO_PANEL, HAS_LABEL_PANEL, HAS_MATERIAL_PANEL, HAS_TEXTURE_PANEL, HAS_VECTOR_PANEL, INSPECTOR_INFO, INSPECTOR_INFO_EXT, IS_DELETED, IS_FIXED, IS_FOCUSSED, IS_PICKED, IS_SELECTED, IS_USED, NUM_TAGS
- Fields inherited from interface jv.project.PgGeometryIf
  AMBIENT_H2_HYPERBOLIC, AMBIENT_H3_HYPERBOLIC, AMBIENT_H4_HYPERBOLIC, AMBIENT_PROJECTIONS, AMBIENT_R1_EUCLIDEAN, AMBIENT_R2_EUCLIDEAN, AMBIENT_R3_EUCLIDEAN, AMBIENT_R4_EUCLIDEAN, AMBIENT_R5_EUCLIDEAN, AMBIENT_S1_SPHERE, AMBIENT_S2_SPHERE, AMBIENT_S3_SPHERE, AMBIENT_S4_SPHERE, AMBIENT_SPACES, BLEND_ALPHA, BLEND_MATERIAL, BLEND_REPLACE, FILTER_DIRECT, FILTER_LINEAR, FILTER_QUADRATIC, HAS_METHOD_MENU, INSPECTOR_CONTROL, INSPECTOR_CONTROL_EXT, INSPECTOR_MATERIAL, INSPECTOR_MATERIAL_EXT, INSPECTOR_TEXTURE, INSPECTOR_TEXTURE_EXT, LABEL_BASE, LABEL_CENTER, LABEL_HEAD, LABEL_MIDDLE, LABEL_TAIL, LABEL_TOP, m_numLabelTypes, METHOD_EXT, PERIODIC_BOTH, PERIODIC_HEIGHT, PERIODIC_NONE, PERIODIC_WIDTH, PROJ_KLEIN_BALL, PROJ_PARALLEL, PROJ_POINCARE_BALL, PROJ_STEREOGRAPHIC, PROJ_UPPER_HALFSPACE, SIDE_BACK, SIDE_BOTH, SIDE_FRONT, SIDE_NONE

Fields
Modifier and Type	Field and Description
`static int`	`BINORMAL`
`static int`	`CURVATURE_NORMAL`
`static int`	`NORMAL`
`static int`	`OFFSET_NORMAL`

Constructor Summary

Constructors
Constructor and Description
`PgPolygon()` Constructor of a polygon in three-dimensional space.
`PgPolygon(int aVertexDim)` Constructor of a polygon set in a space of given dimension.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`assureEdgeColors()` Assures respectively allocates correct length of edge color array.
`void`	`assureEdgeNormals()` Assures respectively allocates correct length of edge normal array.
`void`	`assureEdgeSizes()` Assures respectively allocates correct length of edge size vector.
`boolean`	`blend(double s, PgGeometry ag, double t, PgGeometry bg)` Blend between two polygons using `this = sag + tbg`.
`boolean`	`checkTriangleCut(int vertexInd, PdVector normal)` Given a simple closed, nearly planar polygon, then the function tests whether three successive points of the polygon form a triangle which can be cut off the polygon, i.e. the triangle does not contain any other vertex of the polygon.
`java.lang.Object`	`clone()` Duplicate geometry by recursively cloning all instance variables except inspector panels and lists of registered listeners.
`void`	`computeCircle(int numPoints, double radius)` Compute circle centered at origin in xy-plane with given radius including vertex normals.
`void`	`computeEight(int numPoints)` Compute figure eight in xy-plane with given radius including vertex normals.
`void`	`copy(PsObject object)` Copy instance variables by duplication, not by copying a reference.
`void`	`flipOrientation()` Change orientation of the polygon by inverting the order of vertices of the pointSet, i.e. the end point becomes the first point.
`java.awt.Color[]`	`getEdgeColors()` Get color array for read and write access, but do not modify the size of any color vector.
`PdVector[]`	`getEdgeNormals()` Get vertex normal array for read and write access, but do not modify the size of any normal vector.
`PiVector[]`	`getEdges()` Get the array of vertex indices which define the polygon for readonly purpose.
`PdVector`	`getEdgeSizes()` Get edge sizes for read and write access, but do not modify the length of the vector.
`int[]`	`getFVector()` Compute F-vector that is the number of points, edges, faces, etc.
`java.awt.Color`	`getGlobalEdgeColor()` Get global edge color which is used if no local colors are available.
`java.awt.Color`	`getGlobalEdgeNormalColor()` Get global element color which is used if no local colors are available.
`double`	`getGlobalEdgeNormalLength()` Get length factor of normal vectors when drawn in display.
`double`	`getGlobalEdgeNormalSize()` Get thickness in pixels of normals when drawn in display.
`double`	`getGlobalEdgeSize()` Get thickness in pixels of edge when drawn in display.
`java.awt.Color`	`getGlobalEdgeTagColor()` Get global color of tagged edges.
`java.awt.Color`	`getGlobalPolygonColor()` Deprecated. use getGlobalEdgeColor()
`double`	`getGlobalPolygonSize()` Deprecated. use getGlobalEdgeSize()
`java.awt.Color`	`getGlobalPolygonTagColor()` Deprecated. use getGlobalEdgeTagColor()
`PgJvxSrc`	`getJvx()` Fills a geometry object with data from this instance, for example, to print to file.
`double`	`getLength()` Compute geometric length of polygon as the sum of all edge lengths.
`double`	`getLengthOfEdge(int edgeInd)` Compute length of given edge of polygon.
`int`	`getNumEdges()` Get number of edges of polygon.
`boolean`	`hasEdgeColors()` Check if edge colors have been allocated.
`boolean`	`hasEdgeNormals()` Check if edge normals have been allocated.
`void`	`init()` Initialize and reset instance variables after call to super.init().
`PvPickEvent`	`intersectionWithLine(PdVector rayBaseWorld, PdVector rayDirWorld)` Find intersection of polygon with a given ray.
`boolean`	`isClosed()` Check whether polygon is closed, i.e.if endpoints are connected by additional edge.
`boolean`	`isShowingEdgeColorFromVertices()` Determines whether smooth edge coloring uses vertex colors at vertices, requires vertex colors.
`boolean`	`isShowingEdgeColors()` Determine whether drawing of edge colors is enabled.
`boolean`	`isShowingEdgeFromVertexColors()` Deprecated. since JavaView 3.96.031, use #isShowingEdgeColorFromVertices()
`boolean`	`isShowingEdgeLabels()` Determine whether showing of edge labels is enabled.
`boolean`	`isShowingEdgeNormalArrow()` Determine whether drawing of arrow at edge normals is enabled.
`boolean`	`isShowingEdgeNormals()` Determine whether drawing of edge normals is enabled.
`boolean`	`isShowingEdges()` Determine whether drawing of edges of polygon is enabled.
`boolean`	`isShowingEdgeSizes()` Determine whether drawing of edge sizes is enabled.
`boolean`	`isShowingPolygonColors()` Deprecated. use isShowingEdgeColors()
`boolean`	`isShowingPolygonEndArrow()` Determine whether drawing of arrow at last point of polygon is enabled.
`boolean`	`isShowingPolygonStartArrow()` Determine whether drawing of arrow at first point of polygon is enabled.
`boolean`	`isShowingSmoothEdgeColors()` Determines whether smooth coloring of edges is enabled, currently requires vertex colors.
`boolean`	`isShowingSmoothLighting()` Determines whether smooth lighting is enabled, requires vertex normals.
`void`	`makeBiNormals()` Compute binormals at vertices which are orthogonal to both adjacent edges.
`void`	`makeCurvatureNormals()` Compute normals at vertices as edge bisectors with length equal to (Pi-vertexAngle).
`boolean`	`makeEdgeColorsFromLength()` Create edge color from the polygon length ranging through hue rainbow.
`boolean`	`makeEdgeColorsFromXYZ()` Create color from the edge position within its bounding box which is interpreted as RGB cube.
`boolean`	`makeEdgeColorsFromZ()` Create color from the vertical z-height within its bounding box ranging from low blue to high red.
`boolean`	`makeEdgeColorsFromZHue()` Create color from the vertical z-height within its bounding box ranging through hue rainbow.
`boolean`	`makeEdgeFromVertexColors()` Create edge colors as average of the color of its two vertices.
`void`	`makeNormals()` Deprecated. since JavaView 3.50.002, use makeVertexNormals().
`void`	`makeNormals(int type, double length)` Compute normals at vertices which lie in the span of the adjacent edges.
`void`	`makeOffsetNormals()` Compute normals at vertices as edge bisectors whose tip lies on an offset==1 curve.
`boolean`	`makeVertexColorsFromLength()` Create vertex color from the polygon length ranging through hue rainbow.
`boolean`	`makeVertexFromEdgeColors()` Create vertex colors as average of color of all adjacent edges.
`boolean`	`makeVertexNormals()` Compute normals at vertices as edge bisectors with unit length.
`boolean`	`merge(PgGeometryIf aGeom)` Merge polygon with current object and store union of both objects in 'this'.
`void`	`paint(PvGeometryIf dc)` Major rendering method fills an internal container class supplied by the display.
`void`	`removeEdgeColors()` Remove individual edge colors from a polygon and use the global polygon color instead.
`void`	`removeEdgeNormals()` Remove local edge normals from a geometry.
`void`	`removeEdgeSizes()` Remove edge sizes from a geometry.
`int[]`	`removeMarkedVertices()` Remove vertices marked with tag PsObject#IS_DELETED from polygons.
`void`	`setClosed(boolean flag)` Set flag that polygon is closed.
`void`	`setDimOfVertices(int dim)` Set dimension of vertices.
`boolean`	`setEdgeColor(int ind, java.awt.Color aColor)` Copy new color to edge color at specified position in the color list
`void`	`setEdgeColors(java.awt.Color[] color)` Assign edge colors of list to existing array of edge colors.
`boolean`	`setEdgeNormal(int ind, PdVector aNormal)` Copy new normal to edge normal at specified position in the normal list
`void`	`setEdgeNormals(PdVector[] normal)` Copy edge normals of list to existing array of edge normals.
`void`	`setEdgeSizes(PdVector size)` Copy edge sizes of list to existing array of edge sizes.
`void`	`setGlobalEdgeColor(java.awt.Color color)` Set global edge color to be used if no local colors are available.
`void`	`setGlobalEdgeNormalColor(java.awt.Color color)` Set global normal color to be used if no local colors are available.
`void`	`setGlobalEdgeNormalLength(double length)` Get length factor of normal vectors when drawn in display.
`void`	`setGlobalEdgeNormalSize(double size)` Get thickness in pixels of normals when drawn in display.
`void`	`setGlobalEdgeSize(double size)` Set thickness in pixels of edge when drawn in display.
`void`	`setGlobalEdgeTagColor(java.awt.Color color)` Set global color of tagged edges.
`void`	`setGlobalPolygonColor(java.awt.Color color)` Deprecated. use setGlobalEdgeColor()
`void`	`setGlobalPolygonSize(double size)` Deprecated. use setGlobalEdgeSize()
`void`	`setGlobalPolygonTagColor(java.awt.Color color)` Deprecated. use setGlobalEdgeTagColor()
`void`	`setJvx(PgJvxSrc src)` Fill this instance with data from a geometry source, for example, previously read from file.
`void`	`setNumVertices(int numVertices)` Adjust the number of vertices of the polygon.
`void`	`showEdgeColorFromVertices(boolean flag)` Set flag to enable smooth edge coloring using vertex colors at vertices, requires vertex colors.
`void`	`showEdgeColors(boolean flag)` Set flag to enable drawing of edge colors.
`void`	`showEdgeFromVertexColors(boolean flag)` Deprecated. since JavaView 3.96.031, use #showEdgeColorFromVertices(boolean)
`void`	`showEdgeLabels(boolean flag)` Set flag to enable drawing of edge labels in display.
`void`	`showEdgeNormalArrow(boolean flag)` Set flag to enable drawing of arrow at edge normals.
`void`	`showEdgeNormals(boolean flag)` Set flag to enable drawing of edge normals.
`void`	`showEdges(boolean flag)` Set flag to enable drawing of edges of polygon.
`void`	`showEdgeSizes(boolean flag)` Set flag to enable drawing of edge sizes.
`void`	`showPolygonColors(boolean flag)` Deprecated. use showEdgeColors(boolean)
`void`	`showPolygonEndArrow(boolean flag)` Set flag to enable drawing of arrow at last point of polygons.
`void`	`showPolygonStartArrow(boolean flag)` Set flag to enable drawing of arrow at first point of polygons.
`void`	`showSmoothEdgeColors(boolean flag)` Set flag to enable smooth coloring of edges, currently requires vertex colors.
`void`	`showSmoothLighting(boolean flag)` Set flag to enable smooth lighting, requires vertex normals.
`java.lang.String`	`toString()` Create a multi-line string representation with detailed information about all instance variables.
`PiVector[]`	`triangulate()` Given a simple closed, nearly planar polygon, then the method triangulates the patch by successively removing the vertex with the smallest interior angle.
`boolean`	`update(java.lang.Object event)` Update the class whenever a child has changed.
`void`	`useGlobalPolygonColor(boolean flag)` Deprecated. use showEdgeColors(boolean)

Methods inherited from class jv.geom.PgPointSet
addGeometryItem, addVectorField, addVertex, applyAmbientMatrix, applyModelingMatrix, assureVertexColors, assureVertexNormals, assureVertexSizes, assureVertexTextures, clearTagVertex, computeCone, computeCylinder, computeDisk, computePlane, computeRotation, computeSnail, computeSphere, computeTorus, getAmbientBounds, getBounds, getCenterOfBndBox, getCenterOfGravity, getDimOfColors, getDimOfTextures, getDimOfVectors, getEulerCharacteristic, getGlobalVectorColor, getGlobalVectorLength, getGlobalVectorSize, getGlobalVertexColor, getGlobalVertexNormalColor, getGlobalVertexNormalLength, getGlobalVertexNormalSize, getGlobalVertexSize, getGlobalVertexTagColor, getIndexOfVectorField, getMarkedVertices, getMaxNumVertices, getNumVectorFields, getNumVertices, getSelectedVectorField, getShininess, getSpecularColor, getTexture, getTextureImage, getTextureImageName, getTransparency, getVectorField, getVectorField, getVertex, getVertexColor, getVertexColors, getVertexNormal, getVertexNormals, getVertexSize, getVertexSizes, getVertexTexture, getVertexTextures, getVertices, hasTagVertex, hasVertex, hasVertex, hasVertexColors, hasVertexNormals, hasVertexSizes, hasVertexTextures, isDefaultLabelEnabled, isEnabledIndexLabels, isShowingIndices, isShowingSingleVectorField, isShowingTaggedVertices, isShowingTransparency, isShowingVectorArrow, isShowingVectorArrows, isShowingVectorColors, isShowingVectorField, isShowingVectorFields, isShowingVertexColors, isShowingVertexLabels, isShowingVertexNormalArrow, isShowingVertexNormals, isShowingVertexOutline, isShowingVertexSizes, isShowingVertexTexture, isShowingVertices, makeColorFromVectorLength, makeQuadrVertexTexture, makeVertexColorsFromXYZ, makeVertexColorsFromZ, makeVertexColorsFromZHue, makeVertexTextureFromBndBox, makeVertexTextureFromCylinder, makeVertexTextureFromSphere, makeVertexTextureFromUV, projectFromAmbientSpace, projectToSphere, reflect, removeAllVectorFields, removeHiddenVectorFields, removeTexture, removeVectorField, removeVertex, removeVertexColors, removeVertexNormals, removeVertexSizes, scale, scale, selectVectorField, setCenterOfBndBox, setDefaultLabelEnabled, setDimOfColors, setDimOfTextures, setDimOfVectors, setEnabledIndexLabels, setGlobalVectorColor, setGlobalVectorLength, setGlobalVectorSize, setGlobalVertexColor, setGlobalVertexNormalColor, setGlobalVertexNormalLength, setGlobalVertexNormalSize, setGlobalVertexSize, setGlobalVertexSize, setGlobalVertexTagColor, setMaxNumVertices, setShininess, setSpecularColor, setState, setTagVertex, setTexture, setTextureImage, setTextureImageName, setTransparency, setVertex, setVertex, setVertex, setVertex, setVertexColor, setVertexColors, setVertexNormal, setVertexNormals, setVertexSize, setVertexSizes, setVertexTexture, setVertexTextures, setVertices, showIndices, showSingleVectorField, showTaggedVertices, showTransparency, showVectorArrow, showVectorArrows, showVectorColors, showVectorField, showVectorFields, showVertexColors, showVertexLabels, showVertexNormalArrow, showVertexNormals, showVertexOutline, showVertexSizes, showVertexTexture, showVertices, translate

Methods inherited from class jv.project.PgGeometry
addDisplay, addElement, addPolygon, clearTagElement, clearTagPolygon, convertWorldToModel, fillMethodMenu, fillMethodMenu, getAmbientInvMatrix, getAmbientMatrix, getAmbientProjection, getAmbientSpace, getAuthorInfo, getAuthors, getCenter, getCenterOfElement, getControlPanel, getDiameter, getDimOfSimplex, getDimOfVertices, getDisplayList, getDisplays, getElement, getGeometryInfo, getLabelAttribute, getLabelColor, getLabelFont, getLabelSize, getLabelStyle, getMaterialPanel, getModelMatrix, getPolygon, getState, getTitle, getType, getVersion, getVersionType, hasAmbientMatrix, hasDisplay, hasModelMatrix, hasTagElement, hasTagPolygon, isConfigurable, isEnabledInstanceSharing, isShowingBndBox, isShowingCenter, isShowingName, isShowingTitle, isVisible, removeDisplay, removeElement, removeMethodMenus, removePolygon, setAmbientMatrix, setAmbientProjection, setAmbientSpace, setAuthorInfo, setAuthors, setCenter, setDimOfSimplex, setElement, setEnabledInstanceSharing, setGeometryInfo, setLabelAttribute, setLabelAttribute, setLabelColor, setLabelFont, setLabelSize, setLabelStyle, setModelMatrix, setPolygon, setTagElement, setTagPolygon, setTitle, setType, setVersion, setVersionType, setVisible, showBndBox, showCenter, showName, showTitle

Methods inherited from class jv.object.PsObject
addInspector, addUpdateListener, assureInspector, clearTag, clone, clone, getFather, getInfoPanel, getInspector, getName, getNumObjects, getSymbol, hasInspector, hasTag, hasUpdateListener, instanceOf, instanceOf, newInspector, newInspector, removeInspector, removeInspector, removeUpdateListener, setName, setParent, setSymbol, setTag, updatePanels

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface jv.project.PgGeometryIf
assureInspector, getInfoPanel, getName, hasTag, setName

Methods inherited from interface jv.object.PsUpdateIf
getFather, setParent

- Field Detail
  - NORMAL
```
public static final int NORMAL
```
    See Also:
    Constant Field Values
  - BINORMAL
```
public static final int BINORMAL
```
    See Also:
    Constant Field Values
  - OFFSET_NORMAL
```
public static final int OFFSET_NORMAL
```
    See Also:
    Constant Field Values
  - CURVATURE_NORMAL
```
public static final int CURVATURE_NORMAL
```
    See Also:
    Constant Field Values
- Constructor Detail
  - PgPolygon
```
public PgPolygon()
```
    Constructor of a polygon in three-dimensional space.
  - PgPolygon
```
public PgPolygon(int aVertexDim)
```
    Constructor of a polygon set in a space of given dimension.
- Method Detail
  - init
```
public void init()
```
    Initialize and reset instance variables after call to super.init().
    
    Overrides:
    
    init in class PgPointSet
  - getJvx
```
public PgJvxSrc getJvx()
```
    Fills a geometry object with data from this instance, for example, to print to file.
    
    Specified by:
    
    getJvx in interface PgGeometryIf
    
    Overrides:
    
    getJvx in class PgPointSet
    
    Returns:
    src a geometry source to be filled with data from this instance.
  - setJvx
```
public void setJvx(PgJvxSrc src)
```
    Fill this instance with data from a geometry source, for example, previously read from file.
    
    Specified by:
    
    setJvx in interface PgGeometryIf
    
    Overrides:
    
    setJvx in class PgPointSet
    
    Parameters:
    src - a geometry source used to fill this instance with data.
  - clone
```
public java.lang.Object clone()
```
    Duplicate geometry by recursively cloning all instance variables except inspector panels and lists of registered listeners. The parent relationship is maintained only within this class but not to external classes. In general, all links of the clone to external objects are set to null.
    
    Specified by:
    
    clone in interface PgGeometryIf
    
    Overrides:
    
    clone in class PgPointSet
    
    See Also:
    copy(PsObject)
  - copy
```
public void copy(PsObject object)
```
    Copy instance variables by duplication, not by copying a reference.
    The argument was changed from PgGeometry to PsObject since there were problems in J/Link which preferred to use jv.object.PsObject#copy(PsObject) instead of jv.project.PgGeometry#copy(PsObject).
    
    Overrides:
    
    copy in class PgPointSet
    
    See Also:
    clone()
  - toString
```
public java.lang.String toString()
```
    Create a multi-line string representation with detailed information about all instance variables.
    
    Specified by:
    
    toString in interface PgGeometryIf
    
    Overrides:
    
    toString in class PgPointSet
  - setDimOfVertices
```
public void setDimOfVertices(int dim)
```
    Set dimension of vertices. Make rare use, and try to assign dimension of vertices already in the constructor.
    
    Overrides:
    
    setDimOfVertices in class PgPointSet
  - setNumVertices
```
public void setNumVertices(int numVertices)
```
    Adjust the number of vertices of the polygon.
    Internally the number of edges are updated.
    
    Overrides:
    
    setNumVertices in class PgPointSet
  - getNumEdges
```
public int getNumEdges()
```
    Get number of edges of polygon. If polygon is closed then the number is equal to number of vertices of the pointSet. If the polygon is not closed then the number is equal to (number of vertices-1).
    
    See Also:
    setNumVertices(int)
  - getGlobalEdgeColor
```
public java.awt.Color getGlobalEdgeColor()
```
    Get global edge color which is used if no local colors are available.
  - getGlobalEdgeTagColor
```
public java.awt.Color getGlobalEdgeTagColor()
```
    Get global color of tagged edges.
  - getGlobalEdgeSize
```
public double getGlobalEdgeSize()
```
    Get thickness in pixels of edge when drawn in display.
  - setGlobalEdgeColor
```
public void setGlobalEdgeColor(java.awt.Color color)
```
    Set global edge color to be used if no local colors are available.
  - setGlobalEdgeTagColor
```
public void setGlobalEdgeTagColor(java.awt.Color color)
```
    Set global color of tagged edges.
  - setGlobalEdgeSize
```
public void setGlobalEdgeSize(double size)
```
    Set thickness in pixels of edge when drawn in display.
  - getGlobalPolygonColor
```
public java.awt.Color getGlobalPolygonColor()
```
    Deprecated. use getGlobalEdgeColor()
    
    Get global polygon color which is used if no local colors are available.
  - getGlobalPolygonTagColor
```
public java.awt.Color getGlobalPolygonTagColor()
```
    Deprecated. use getGlobalEdgeTagColor()
    
    Get global color of tagged polygons.
  - getGlobalPolygonSize
```
public double getGlobalPolygonSize()
```
    Deprecated. use getGlobalEdgeSize()
    
    Get thickness in pixels of polygon when drawn in display.
  - setGlobalPolygonColor
```
public void setGlobalPolygonColor(java.awt.Color color)
```
    Deprecated. use setGlobalEdgeColor()
    
    Set global polygon color to be used if no local colors are available.
  - setGlobalPolygonTagColor
```
public void setGlobalPolygonTagColor(java.awt.Color color)
```
    Deprecated. use setGlobalEdgeTagColor()
    
    Set global color of tagged polygons.
  - setGlobalPolygonSize
```
public void setGlobalPolygonSize(double size)
```
    Deprecated. use setGlobalEdgeSize()
    
    Set thickness in pixels of polygon when drawn in display.
  - getGlobalEdgeNormalColor
```
public java.awt.Color getGlobalEdgeNormalColor()
```
    Get global element color which is used if no local colors are available.
    
    Since:
    
    JavaView 2.69
  - getGlobalEdgeNormalLength
```
public double getGlobalEdgeNormalLength()
```
    Get length factor of normal vectors when drawn in display.
    
    Since:
    
    JavaView 2.69
  - getGlobalEdgeNormalSize
```
public double getGlobalEdgeNormalSize()
```
    Get thickness in pixels of normals when drawn in display.
    
    Since:
    
    JavaView 2.69
  - setGlobalEdgeNormalColor
```
public void setGlobalEdgeNormalColor(java.awt.Color color)
```
    Set global normal color to be used if no local colors are available.
    
    Since:
    
    JavaView 2.69
  - setGlobalEdgeNormalLength
```
public void setGlobalEdgeNormalLength(double length)
```
    Get length factor of normal vectors when drawn in display.
    
    Since:
    
    JavaView 2.69
  - setGlobalEdgeNormalSize
```
public void setGlobalEdgeNormalSize(double size)
```
    Get thickness in pixels of normals when drawn in display.
    
    Since:
    
    JavaView 2.69
  - showPolygonColors
```
public void showPolygonColors(boolean flag)
```
    Deprecated. use showEdgeColors(boolean)
    
    Set flag to enable drawing of polygon colors.
  - useGlobalPolygonColor
```
public void useGlobalPolygonColor(boolean flag)
```
    Deprecated. use showEdgeColors(boolean)
    
    Set flag of using global polygon color instead of coloring each polygon individually.
  - isShowingEdgeLabels
```
public boolean isShowingEdgeLabels()
```
    Determine whether showing of edge labels is enabled.
  - isShowingEdges
```
public boolean isShowingEdges()
```
    Determine whether drawing of edges of polygon is enabled.
  - isShowingEdgeNormals
```
public boolean isShowingEdgeNormals()
```
    Determine whether drawing of edge normals is enabled.
  - isShowingEdgeNormalArrow
```
public boolean isShowingEdgeNormalArrow()
```
    Determine whether drawing of arrow at edge normals is enabled.
  - isShowingEdgeColors
```
public boolean isShowingEdgeColors()
```
    Determine whether drawing of edge colors is enabled.
  - isShowingEdgeSizes
```
public boolean isShowingEdgeSizes()
```
    Determine whether drawing of edge sizes is enabled.
  - isShowingPolygonStartArrow
```
public boolean isShowingPolygonStartArrow()
```
    Determine whether drawing of arrow at first point of polygon is enabled.
  - isShowingPolygonEndArrow
```
public boolean isShowingPolygonEndArrow()
```
    Determine whether drawing of arrow at last point of polygon is enabled.
  - isShowingPolygonColors
```
public boolean isShowingPolygonColors()
```
    Deprecated. use isShowingEdgeColors()
    
    Set flag to enable drawing of polygon colors.
  - showEdgeLabels
```
public void showEdgeLabels(boolean flag)
```
    Set flag to enable drawing of edge labels in display.
  - showEdges
```
public void showEdges(boolean flag)
```
    Set flag to enable drawing of edges of polygon.
  - showEdgeNormals
```
public void showEdgeNormals(boolean flag)
```
    Set flag to enable drawing of edge normals.
  - showEdgeNormalArrow
```
public void showEdgeNormalArrow(boolean flag)
```
    Set flag to enable drawing of arrow at edge normals.
  - showEdgeColors
```
public void showEdgeColors(boolean flag)
```
    Set flag to enable drawing of edge colors.
  - showEdgeSizes
```
public void showEdgeSizes(boolean flag)
```
    Set flag to enable drawing of edge sizes.
  - showPolygonStartArrow
```
public void showPolygonStartArrow(boolean flag)
```
    Set flag to enable drawing of arrow at first point of polygons.
  - showPolygonEndArrow
```
public void showPolygonEndArrow(boolean flag)
```
    Set flag to enable drawing of arrow at last point of polygons.
  - getEdgeColors
```
public java.awt.Color[] getEdgeColors()
```
    Get color array for read and write access, but do not modify the size of any color vector. Also note, that the actual size of the color array may be larger than m_numVertices for efficiency reasons. Therefore, do not make use of the length of the array.
  - hasEdgeColors
```
public boolean hasEdgeColors()
```
    Check if edge colors have been allocated.
    
    See Also:
    assureEdgeColors()
  - hasEdgeNormals
```
public boolean hasEdgeNormals()
```
    Check if edge normals have been allocated.
    
    See Also:
    assureEdgeNormals()
  - removeEdgeColors
```
public void removeEdgeColors()
```
    Remove individual edge colors from a polygon and use the global polygon color instead.
    Showing of edge colors must be switched off explicitly using showEdgeColors(boolean).
  - setEdgeColors
```
public void setEdgeColors(java.awt.Color[] color)
```
    Assign edge colors of list to existing array of edge colors. Length of argument list must be equal or larger than getNumEdges(). All edge colors are assigned.
    
    Parameters:
    color - array with new edge colors
  - setEdgeColor
```
public boolean setEdgeColor(int ind,
                   java.awt.Color aColor)
```
    Copy new color to edge color at specified position in the color list
    
    Parameters:
    ind - index of edge
    aColor - color to be copied to color list
    
    Returns:
    boolean false, if index out of range, or argument missing
  - assureEdgeColors
```
public void assureEdgeColors()
```
    Assures respectively allocates correct length of edge color array. Length of array is equal to length of edge array.
  - getEdgeNormals
```
public PdVector[] getEdgeNormals()
```
    Get vertex normal array for read and write access, but do not modify the size of any normal vector. Also note, that the actual size of the color may be larger than m_numVertices for efficiency reasons. Therefore, do not make use of the length of the array.
  - removeEdgeNormals
```
public void removeEdgeNormals()
```
    Remove local edge normals from a geometry.
    Showing of edge normals must be switched off explicitly using showEdgeColors(boolean).
  - setEdgeNormals
```
public void setEdgeNormals(PdVector[] normal)
```
    Copy edge normals of list to existing array of edge normals. Length of argument list must be equal or larger than getNumEdges(). All edge normals are copied. The dimension of all argument normals must be equal to getDimOfVectors() of the geometry.
    
    Parameters:
    normal - array with new edge normals
  - setEdgeNormal
```
public boolean setEdgeNormal(int ind,
                    PdVector aNormal)
```
    Copy new normal to edge normal at specified position in the normal list
    
    Parameters:
    ind - index of edge
    aNormal - normal to be copied to normal list
    
    Returns:
    boolean false, if index out of range, or argument missing
  - assureEdgeNormals
```
public void assureEdgeNormals()
```
    Assures respectively allocates correct length of edge normal array. Length of array is equal to length of edge array. Dimension of normal vectors is equal to dimension of vertices.
  - getEdgeSizes
```
public PdVector getEdgeSizes()
```
    Get edge sizes for read and write access, but do not modify the length of the vector. Also note, that the actual size of the vector may be larger than m_numVertices for efficiency reasons. Therefore, do not make use of the length of the array.
    
    Since:
    
    JavaView 3.09
  - removeEdgeSizes
```
public void removeEdgeSizes()
```
    Remove edge sizes from a geometry.
    Showing of edge sizes must be switched off explicitly using showEdgeSizes(boolean).
    
    Since:
    
    JavaView 3.09
  - setEdgeSizes
```
public void setEdgeSizes(PdVector size)
```
    Copy edge sizes of list to existing array of edge sizes. Length of argument list must be equal or larger than getNumEdges(). All edge sizes are copied.
    Showing of edge sizes must be switched on in order to be visible.
    
    Parameters:
    size - array with new edge size for all polygons
    Since:
    
    JavaView 3.09
  - assureEdgeSizes
```
public void assureEdgeSizes()
```
    Assures respectively allocates correct length of edge size vector. Length of vector is equal to length of edge array. Dimension of size vector is equal to maximal number of vertices.
    
    Since:
    
    JavaView 3.09
  - getEdges
```
public PiVector[] getEdges()
```
    Get the array of vertex indices which define the polygon for readonly purpose. Also note, that the actual size of the array may be larger than m_numEdges+1 for efficiency reasons. Therefore, do not make use of the length of the array.
    
    Since:
    
    JavaView 2.69
  - update
```
public boolean update(java.lang.Object event)
```
    Update the class whenever a child has changed. Method is usually invoked from the children.
    
    Specified by:
    
    update in interface PsUpdateIf
    
    Overrides:
    
    update in class PgPointSet
    
    Parameters:
    event - carries a lot of information
    
    Returns:
    true if event has been handled, otherwise false
    See Also:
    PsObject.setParent(PsUpdateIf), PsObject.getFather(), PsObject.addUpdateListener(PsUpdateIf)
  - paint
```
public void paint(PvGeometryIf dc)
```
    Major rendering method fills an internal container class supplied by the display. See jv.project.PgGeometryIf for detailed information.
    
    Specified by:
    
    paint in interface PgGeometryIf
    
    Overrides:
    
    paint in class PgPointSet
    
    See Also:
    PgGeometryIf
  - getLengthOfEdge
```
public double getLengthOfEdge(int edgeInd)
```
    Compute length of given edge of polygon.
    
    Since:
    
    JavaView 3.12.002
  - getLength
```
public double getLength()
```
    Compute geometric length of polygon as the sum of all edge lengths. If polygon is closed then the distance of the first and last vertex is added to the polygon length.
    
    Returns:
    length of polygon
    See Also:
    isClosed()
  - isClosed
```
public boolean isClosed()
```
    Check whether polygon is closed, i.e.if endpoints are connected by additional edge.
    
    Returns:
    flag whether polygon is closed.
    See Also:
    setClosed(boolean)
  - setClosed
```
public void setClosed(boolean flag)
```
    Set flag that polygon is closed. In the previous version 1.00 an additional vertex might have been allocated. This version just sets a flag.
    
    Parameters:
    flag - true closes polygons
    See Also:
    isClosed()
  - computeEight
```
public void computeEight(int numPoints)
```
    Compute figure eight in xy-plane with given radius including vertex normals.
    
    Parameters:
    numPoints - Discretization of polygon
  - computeCircle
```
public void computeCircle(int numPoints,
                 double radius)
```
    Compute circle centered at origin in xy-plane with given radius including vertex normals.
    
    Parameters:
    numPoints - Discretization of polygon
    radius - Radius of circle
  - removeMarkedVertices
```
public int[] removeMarkedVertices()
```
    Remove vertices marked with tag PsObject#IS_DELETED from polygons. It is neccessary to keep a valid polygon set after removal of vertices in the superclass.
    
    Overrides:
    
    removeMarkedVertices in class PgPointSet
    
    Returns:
    array with indices of new positions of vertices
    See Also:
    PgPointSet.removeMarkedVertices()
  - merge
```
public boolean merge(PgGeometryIf aGeom)
```
    Merge polygon with current object and store union of both objects in 'this'. Number of points and polygons is the sum of both objects unless last vertex of this polygon is PuMath.EPS close to first vertex of argument polygon, which would be identified.
    Polygon will not be closed, even if it was closed before.
    The merged geometry will have local colors allocated and assignd if
```
                1. both the global color of both geometries are different, or
                2. either geometry has local colors.
 
```
    If local colors are allocated but one of the geometries does not have local colors then its local colors are be assumed to be its global color. The merged geometry will show globalVertexColors if
```
                1. the global color of both geometries is the same, and
                2. both geometries are showing the global color.
 
```
    In all other cases the merged geometry will show local colors. The global color of the merged geometry is never changed.
    Specified by:
    
    merge in interface PgGeometryIf
    
    Overrides:
    
    merge in class PgPointSet
    
    Parameters:
    aGeom - Polygon set to be merged into 'this'
    
    Returns:
    true if method was successfull
  - blend
```
public boolean blend(double s,
            PgGeometry ag,
            double t,
            PgGeometry bg)
```
    Blend between two polygons using this = s*ag + t*bg.
    
    Specified by:
    
    blend in interface PgGeometryIf
    
    Overrides:
    
    blend in class PgPointSet
    
    Parameters:
    s - weight of vertices of first geometry
    ag - first geometry used for blending
    t - weight of vertices of second geometry
    bg - second geometry used for blending
    
    Returns:
    true on success
  - makeVertexNormals
```
public boolean makeVertexNormals()
```
    Compute normals at vertices as edge bisectors with unit length. All normals are oriented to show to the same side of the polygon as the first normal which is non-degenerate.
    This method correctly handles polygons with sequences of parallel edges and multiple vertices.
    
    Overrides:
    
    makeVertexNormals in class PgPointSet
  - makeNormals
```
public void makeNormals()
```
    Deprecated. since JavaView 3.50.002, use makeVertexNormals().
    
    Compute normals at vertices as edge bisectors with unit length.
  - makeBiNormals
```
public void makeBiNormals()
```
    Compute binormals at vertices which are orthogonal to both adjacent edges. All binormals lie in the span of the two edges of a vertex and all binormals have the same orientation as the normal vector of the enclosed patch surface.
    This method correctly handles polygons with sequences of parallel edges and multiple vertices.
  - makeOffsetNormals
```
public void makeOffsetNormals()
```
    Compute normals at vertices as edge bisectors whose tip lies on an offset==1 curve. All normals are oriented to show to the same side of the polygon as the first normal which is non-degenerate.
    This method correctly handles polygons with sequences of parallel edges and multiple vertices.
  - makeCurvatureNormals
```
public void makeCurvatureNormals()
```
    Compute normals at vertices as edge bisectors with length equal to (Pi-vertexAngle). All normals are oriented to show to the same side of the polygon as the first normal which is non-degenerate.
    This method correctly handles polygons with sequences of parallel edges and multiple vertices.
  - makeNormals
```
public void makeNormals(int type,
               double length)
```
    Compute normals at vertices which lie in the span of the adjacent edges. All normals are oriented to show to the same side of the polygon as the first normal which is non-degenerate.
    This method correctly handles polygons with sequences of parallel edges and multiple vertices.
  - checkTriangleCut
```
public boolean checkTriangleCut(int vertexInd,
                       PdVector normal)
```
    Given a simple closed, nearly planar polygon, then the function tests whether three successive points of the polygon form a triangle which can be cut off the polygon, i.e. the triangle does not contain any other vertex of the polygon.
    Remark: this condition is only valid of the projection of the polygon onto a plane orthogonal to the normal of the polygon is a simple closed curve with no self-intersections.
    Fuer den Test wird abgefragt, ob die uebrigen Eckpunkte des Polygons im Innern des vom Dreieck p1,p2,p3 und der Normalen orient gebildeten Prismas liegt. Wenn alle Punkte ausserhalb liegen, so verlaeuft Linie im Innern d. Polygons.
    
    Parameters:
    vertexInd - index of middle vertex which might be cut off
    normal - normal of polygon, used as orientation, i.e. polygon runs counter-clockwise around normal
  - triangulate
```
public PiVector[] triangulate()
```
    Given a simple closed, nearly planar polygon, then the method triangulates the patch by successively removing the vertex with the smallest interior angle. The method can handle non-convex polygons.
    ToDo: But until now it cannot handle situations where an edge introduced by removing a vertex may intersect the polygon somewhere else. To solve this problem the above method checkTriangleCut must be employed.
    
    Returns:
    Array of vectors each containing the vertex indices of a triangle.
  - intersectionWithLine
```
public PvPickEvent intersectionWithLine(PdVector rayBaseWorld,
                               PdVector rayDirWorld)
```
    Find intersection of polygon with a given ray. Closest polygon edge is located. Method is used for interactive picking. Base and direction of ray must be given in 3D world coordinates.
    
    Specified by:
    
    intersectionWithLine in interface PgGeometryIf
    
    Overrides:
    
    intersectionWithLine in class PgPointSet
    
    Parameters:
    rayBaseWorld - 3D base point of ray eventually hitting the surface.
    rayDirWorld - 3D direction vector of ray eventually hitting the surface.
    
    Returns:
    full information about hit element, barycentric coordinates etc.
  - getFVector
```
public int[] getFVector()
```
    Compute F-vector that is the number of points, edges, faces, etc.
    
    Overrides:
    
    getFVector in class PgPointSet
  - flipOrientation
```
public void flipOrientation()
```
    Change orientation of the polygon by inverting the order of vertices of the pointSet, i.e. the end point becomes the first point. The superclass multiplies each normal vector with -1.
    
    Overrides:
    
    flipOrientation in class PgPointSet
  - makeEdgeColorsFromXYZ
```
public boolean makeEdgeColorsFromXYZ()
```
    Create color from the edge position within its bounding box which is interpreted as RGB cube. If dimension of vertices is smaller than three then only the first vertex components are used in the color computation.
    
    Since:
    
    JavaView 2.69
  - makeEdgeColorsFromZ
```
public boolean makeEdgeColorsFromZ()
```
    Create color from the vertical z-height within its bounding box ranging from low blue to high red. If dimension of vertices is smaller than three then the highest vertex component is used instead of the z-component in the color computation.
    
    Since:
    
    JavaView 2.69
  - makeEdgeColorsFromZHue
```
public boolean makeEdgeColorsFromZHue()
```
    Create color from the vertical z-height within its bounding box ranging through hue rainbow. If dimension of vertices is smaller than three then the highest vertex component are used instead of the z-component in the color computation.
    
    Since:
    
    JavaView 2.69
  - isShowingSmoothLighting
```
public boolean isShowingSmoothLighting()
```
    Determines whether smooth lighting is enabled, requires vertex normals.
    
    Since:
    
    JavaView 2.69
  - showSmoothLighting
```
public void showSmoothLighting(boolean flag)
```
    Set flag to enable smooth lighting, requires vertex normals.
    
    Since:
    
    JavaView 2.69
  - isShowingSmoothEdgeColors
```
public boolean isShowingSmoothEdgeColors()
```
    Determines whether smooth coloring of edges is enabled, currently requires vertex colors.
    
    Since:
    
    JavaView 2.69
  - showSmoothEdgeColors
```
public void showSmoothEdgeColors(boolean flag)
```
    Set flag to enable smooth coloring of edges, currently requires vertex colors.
    
    Since:
    
    JavaView 2.69
  - isShowingEdgeColorFromVertices
```
public boolean isShowingEdgeColorFromVertices()
```
    Determines whether smooth edge coloring uses vertex colors at vertices, requires vertex colors.
    
    Since:
    
    JavaView 2.69
  - showEdgeColorFromVertices
```
public void showEdgeColorFromVertices(boolean flag)
```
    Set flag to enable smooth edge coloring using vertex colors at vertices, requires vertex colors.
    
    Since:
    
    JavaView 2.69
  - isShowingEdgeFromVertexColors
```
public boolean isShowingEdgeFromVertexColors()
```
    Deprecated. since JavaView 3.96.031, use #isShowingEdgeColorFromVertices()
    
    Determines whether smooth edge coloring uses vertex colors at vertices, requires vertex colors.
    
    Since:
    
    JavaView 2.69
  - showEdgeFromVertexColors
```
public void showEdgeFromVertexColors(boolean flag)
```
    Deprecated. since JavaView 3.96.031, use #showEdgeColorFromVertices(boolean)
    
    Set flag to enable smooth edge coloring using vertex colors at vertices, requires vertex colors.
    
    Since:
    
    JavaView 2.69
  - makeEdgeFromVertexColors
```
public boolean makeEdgeFromVertexColors()
```
    Create edge colors as average of the color of its two vertices. Vertex colors must be available.
    
    Since:
    
    JavaView 2.69
  - makeVertexFromEdgeColors
```
public boolean makeVertexFromEdgeColors()
```
    Create vertex colors as average of color of all adjacent edges. Edge colors must be available.
    
    Since:
    
    JavaView 2.69
  - makeEdgeColorsFromLength
```
public boolean makeEdgeColorsFromLength()
```
    Create edge color from the polygon length ranging through hue rainbow. If polygon is closed then both end points have the same color red, otherwise color ranges from red to bluish.
    
    Since:
    
    JavaView 2.70
  - makeVertexColorsFromLength
```
public boolean makeVertexColorsFromLength()
```
    Create vertex color from the polygon length ranging through hue rainbow. If polygon is closed then both end points have the same color red, otherwise color ranges from red to bluish.
    
    Since:
    
    JavaView 2.70

Class PgPolygon

Field Summary

Fields inherited from class jv.object.PsObject

Fields inherited from interface jv.project.PgGeometryIf

Constructor Summary

Method Summary

Methods inherited from class jv.geom.PgPointSet

Methods inherited from class jv.project.PgGeometry

Methods inherited from class jv.object.PsObject

Methods inherited from class java.lang.Object

Methods inherited from interface jv.project.PgGeometryIf

Methods inherited from interface jv.object.PsUpdateIf

Field Detail

NORMAL

BINORMAL

OFFSET_NORMAL

CURVATURE_NORMAL

Constructor Detail

PgPolygon

PgPolygon

Method Detail

init

getJvx

setJvx

clone

copy

toString

setDimOfVertices

setNumVertices

getNumEdges

getGlobalEdgeColor

getGlobalEdgeTagColor

getGlobalEdgeSize

setGlobalEdgeColor

setGlobalEdgeTagColor

setGlobalEdgeSize

getGlobalPolygonColor

getGlobalPolygonTagColor

getGlobalPolygonSize

setGlobalPolygonColor

setGlobalPolygonTagColor

setGlobalPolygonSize

getGlobalEdgeNormalColor

getGlobalEdgeNormalLength

getGlobalEdgeNormalSize

setGlobalEdgeNormalColor

setGlobalEdgeNormalLength

setGlobalEdgeNormalSize

showPolygonColors

useGlobalPolygonColor

isShowingEdgeLabels

isShowingEdges

isShowingEdgeNormals

isShowingEdgeNormalArrow

isShowingEdgeColors

isShowingEdgeSizes

isShowingPolygonStartArrow

isShowingPolygonEndArrow

isShowingPolygonColors

showEdgeLabels

showEdges

showEdgeNormals

showEdgeNormalArrow

showEdgeColors

showEdgeSizes

showPolygonStartArrow

showPolygonEndArrow

getEdgeColors

hasEdgeColors

hasEdgeNormals

removeEdgeColors

setEdgeColors

setEdgeColor

assureEdgeColors

getEdgeNormals

removeEdgeNormals

setEdgeNormals

setEdgeNormal

assureEdgeNormals

getEdgeSizes