PgPolygonOnElementSet ("JavaView Reference Manual")

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

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, PsUpdateIf, PgGeometryIf
```
public class PgPolygonOnElementSet
extends PgPolygon
```
A polygon on a triangulated element set whose vertices are given by barycentric coordinates. Every point of a PolygonOnElementSet is given by the element index of the element the point lies on, and the barycentric coordinates with respect to this triangle. The base geometry must be a triangulated element set.

See Also:
PgPolygon, PgElementSet, PgPointSetOnElementSet, Serialized Form

Field Summary

Fields
Modifier and Type	Field and Description
`static double`	`BARYEPS` Default accuracy used at checks for zero in barycentric coordinates (used e.g. in exp(...)).
`double`	`m_eps` This accuracy is actually used for zero-checks in barycentric coordinates (used e.g. in exp(...)).

Fields inherited from class jv.geom.PgPolygon
BINORMAL, CURVATURE_NORMAL, NORMAL, 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

Constructor Summary

Constructors
Constructor and Description
`PgPolygonOnElementSet(int dim)` Constructs a new polygon on an element set triangulation.
`PgPolygonOnElementSet(PgElementSet geom)` Constructs a new polygon on an element set triangulation.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`addPolygon(PgPolygonOnElementSet poly)` Deprecated. since JavaView 3.95.004, use merge(PgGeometryIf).
`boolean`	`blend(double s, PgGeometry ag, double t, PgGeometry bg)` Blend between two polygons using `this = sag + tbg`.
`java.lang.Object`	`clone()` Duplicate geometry by recursively cloning all instance variables except inspector panels and lists of registered listeners.
`void`	`computeNormalCurvature()` Compute the normal curvature of a surface mesh along a curve on the mesh.
`void`	`computeVertices()` Compute all geometric vertex positions on the base surface from barycentric coordinates.
`void`	`copy(PsObject object)` Copy instance variables by duplication, not by copying a reference.
`void`	`copyIntrinsicData(PgPolygonOnElementSet source)` deprecated since JavaView 3.96.006, use copy() instead.
`int`	`eval(PdVector[] bary, PiVector outelem, double stepSize)` Evaluates the polygon in steps of given size.
`double`	`eval(PdVector bary1, PdVector bary2, PdVector bary3, PiVector outelem, double step)` Evaluates the polygon in given steps and returns the calculated points in order.
`PdBaryDir`	`exp(int iniElem, PdBary iniBary, PdBaryDir iniDir, double length)` Deprecated. Use jvx.numeric.PnStraightestGeodesic .
`PdBaryDir`	`exp(int iniElem, PdBary iniBary, PdBaryDir iniDir, double length, PgPolygon outpoly)` Deprecated. Use jvx.numeric.PnStraightestGeodesic .
`void`	`flipOrientation()` Change orientation of the polygon by inverting the order of the vertices, i.e. the end point becomes the first point.
`PdBary[]`	`getBary()` Deprecated. since JavaView 3.96.006, use getVertexBary() instead.
`PdBary`	`getBary(int vertInd)` Deprecated. since JavaView 3.96.006, use getVertexBary(int) instead.
`PiVector`	`getElemInd()` Deprecated. since JavaView 3.96.006, use getVertexElemInd(int) instead.
`int`	`getElemInd(int vertInd)` Deprecated. since JavaView 3.96.006, use getVertexElemInd(int) instead.
`PgElementSet`	`getGeometry()` Get the underlying geometry.
`static PgVectorField`	`getNormalCurvature(PgPolygonOnElementSet polygon, PdMatrix[] shapeOperator, PgVectorField normCurvature)` Compute the normal curvature of a surface mesh along a curve on the mesh.
`PgPolygon`	`getPolygon()` Returns a polygon in world coordinates.
`boolean`	`getPolygon(PgPolygon out)` Returns a polygon in world coordinates.
`PdBary[]`	`getVertexBary()` Get array of barycentric positions for read and write access, but do not modify the size of any vector.
`PdBary`	`getVertexBary(int vertInd)` Get barycentric coordinates of the vertex at given index.
`PiVector`	`getVertexElemInd()` Get element indices of all vertices.
`int`	`getVertexElemInd(int vertInd)` Get element index of the vertex at given index.
`void`	`init()` Initialize and reset instance variables after call to super.init().
`void`	`makeNormalsFromSurfaceNormals()` Create a (vertex-based) normal field along the curve from the (vertex-based) normal field of the surface.
`static void`	`makeNormalsFromSurfaceNormals(PgPolygonOnElementSet polygon)` Create a (vertex-based) normal field along the curve from the (vertex-based) normal field of the surface.
`boolean`	`merge(PgGeometryIf aGeom)` Merge polygon with current object and store union of both objects in 'this'.
`static PdBaryDir[]`	`projectCurveOntoElementSet(PgElementSet geom, PgPolygon curve, PdBary start, PgPolygonOnElementSet outCurve)` Project a polygon onto the surface.
`static PdBaryDir[]`	`projectCurveOntoElementSet(PgElementSet geom, PgPolygon curve, PgPolygonOnElementSet outCurve)` Project a polygon onto the surface.
`int[]`	`removeMarkedVertices()` Remove vertices marked with tag PsObject#IS_DELETED from polygons.
`void`	`setAccuracy(double newacc)` Sets the accuracy that is used at checks for zero in barycentric coordinates.
`void`	`setBary(int vertInd, int elemInd, PdBary bary)` Deprecated. since JavaView 3.96.006, use setVertexBary(int, int, PdBary) instead.
`void`	`setGeometry(PgElementSet geom)` Assign a new underlying simplicial surface.
`void`	`setMaxNumVertices(int numVertices)` Allocate given number of vertices, and allocate normals, colors etc.
`void`	`setVertex(int vertInd, int elemInd, PdBary bary)` Deprecated. since JavaView 3.96.006, use setVertexBary(int, int, PdBary) instead.
`void`	`setVertex(int vertInd, PdBary bary)` Deprecated. since JavaView 3.96.006, use setVertexBary(int, int, PdBary) instead.
`void`	`setVertexBary(int vertInd, int elemInd, PdBary bary)` Set barycentric coordinate and element index of vertex at given index, and also update the position of the corresponding vertex.
`void`	`setVertexBary(int vertInd, PdBary bary)` Set barycentric coordinate and element index of vertex at given index, and also update the position of the corresponding vertex.
`void`	`swap(int i, int j)` Swap vertices pos and otherPos.
`PdBary`	`swap(PgPolygonOnElementSet other, int pos, int otherPos, int num)` Swaps a specified number of vertices in this polygon, beginning at the specified position, with vertices of the specified polygon.
`java.lang.String`	`toString()` A long long description
`void`	`updateVertices()` Updates the Euclidean coordinates of the vertices from their barycentric coordinates.

Methods inherited from class jv.geom.PgPolygon
assureEdgeColors, assureEdgeNormals, assureEdgeSizes, checkTriangleCut, computeCircle, computeEight, getEdgeColors, getEdgeNormals, getEdges, getEdgeSizes, getFVector, getGlobalEdgeColor, getGlobalEdgeNormalColor, getGlobalEdgeNormalLength, getGlobalEdgeNormalSize, getGlobalEdgeSize, getGlobalEdgeTagColor, getGlobalPolygonColor, getGlobalPolygonSize, getGlobalPolygonTagColor, getJvx, getLength, getLengthOfEdge, getNumEdges, hasEdgeColors, hasEdgeNormals, intersectionWithLine, isClosed, isShowingEdgeColorFromVertices, isShowingEdgeColors, isShowingEdgeFromVertexColors, isShowingEdgeLabels, isShowingEdgeNormalArrow, isShowingEdgeNormals, isShowingEdges, isShowingEdgeSizes, isShowingPolygonColors, isShowingPolygonEndArrow, isShowingPolygonStartArrow, isShowingSmoothEdgeColors, isShowingSmoothLighting, makeBiNormals, makeCurvatureNormals, makeEdgeColorsFromLength, makeEdgeColorsFromXYZ, makeEdgeColorsFromZ, makeEdgeColorsFromZHue, makeEdgeFromVertexColors, makeNormals, makeNormals, makeOffsetNormals, makeVertexColorsFromLength, makeVertexFromEdgeColors, makeVertexNormals, paint, removeEdgeColors, removeEdgeNormals, removeEdgeSizes, setClosed, setDimOfVertices, setEdgeColor, setEdgeColors, setEdgeNormal, setEdgeNormals, setEdgeSizes, setGlobalEdgeColor, setGlobalEdgeNormalColor, setGlobalEdgeNormalLength, setGlobalEdgeNormalSize, setGlobalEdgeSize, setGlobalEdgeTagColor, setGlobalPolygonColor, setGlobalPolygonSize, setGlobalPolygonTagColor, setJvx, setNumVertices, showEdgeColorFromVertices, showEdgeColors, showEdgeFromVertexColors, showEdgeLabels, showEdgeNormalArrow, showEdgeNormals, showEdges, showEdgeSizes, showPolygonColors, showPolygonEndArrow, showPolygonStartArrow, showSmoothEdgeColors, showSmoothLighting, triangulate, update, useGlobalPolygonColor

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, 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
  - BARYEPS
```
public static double BARYEPS
```
    Default accuracy used at checks for zero in barycentric coordinates (used e.g. in exp(...)).
  - m_eps
```
public double m_eps
```
    This accuracy is actually used for zero-checks in barycentric coordinates (used e.g. in exp(...)).
- Constructor Detail
  - PgPolygonOnElementSet
```
public PgPolygonOnElementSet(PgElementSet geom)
```
    Constructs a new polygon on an element set triangulation.
    
    Parameters:
    geom - Underlying element set, must be a triangulation.
  - PgPolygonOnElementSet
```
public PgPolygonOnElementSet(int dim)
```
    Constructs a new polygon on an element set triangulation.
    
    Parameters:
    dim - Dimension of ambient space.
- Method Detail
  - init
```
public void init()
```
    Initialize and reset instance variables after call to super.init().
    
    Overrides:
    
    init in class PgPolygon
  - toString
```
public java.lang.String toString()
```
    A long long description
    
    Specified by:
    
    toString in interface PgGeometryIf
    
    Overrides:
    
    toString in class PgPolygon
  - getGeometry
```
public PgElementSet getGeometry()
```
    Get the underlying geometry.
    
    Returns:
    Reference to underlying triangulation.
  - setGeometry
```
public void setGeometry(PgElementSet geom)
```
    Assign a new underlying simplicial surface. Method returns with warning if surface is not a triangulation.
    
    Parameters:
    geom - New underlying triangulation.
  - 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 except to the base geometry whose reference is kept.
    
    Specified by:
    
    clone in interface PgGeometryIf
    
    Overrides:
    
    clone in class PgPolygon
    
    See Also:
    copy(PsObject)
  - copy
```
public void copy(PsObject object)
```
    Copy instance variables by duplication, not by copying a reference. Reference to base geometry is not changed.
    
    Overrides:
    
    copy in class PgPolygon
    
    Since:
    
    JavaView 2.65.000
    
    See Also:
    clone()
  - copyIntrinsicData
```
public void copyIntrinsicData(PgPolygonOnElementSet source)
```
    deprecated since JavaView 3.96.006, use copy() instead.
  - setMaxNumVertices
```
public void setMaxNumVertices(int numVertices)
```
    Allocate given number of vertices, and allocate normals, colors etc. if they already exist. All vertex allocation is done in this method. Method should not be called directly unless a specific allocation is required. Usually, a user would specify the number of vertices via setNumVertices().
    
    Overrides:
    
    setMaxNumVertices in class PgPointSet
  - getVertexBary
```
public PdBary[] getVertexBary()
```
    Get array of barycentric positions for read and write access, but do not modify the size of any vector.
    Note, that the actual size of the vertex array may differ from getNumVertices() for efficiency reasons. Therefore, do not use bary.length but use getNumVertices().
    Note, the array is void as soon as the number of vertices changes. After issuing setNumVertices(int) then call this method again.
  - getVertexBary
```
public PdBary getVertexBary(int vertInd)
```
    Get barycentric coordinates of the vertex at given index.
    
    Parameters:
    vertInd - Index of vertex.
    
    Returns:
    Barycentric coordinates of vertex.
    See Also:
    getVertexElemInd(int)
  - getVertexElemInd
```
public int getVertexElemInd(int vertInd)
```
    Get element index of the vertex at given index.
    
    Parameters:
    vertInd - index of vertex
    
    Returns:
    element index of given vertex
    See Also:
    getVertexBary(int)
  - getVertexElemInd
```
public PiVector getVertexElemInd()
```
    Get element indices of all vertices.
    
    Returns:
    a new PiVector of the global element indices.
  - setVertexBary
```
public void setVertexBary(int vertInd,
                 int elemInd,
                 PdBary bary)
```
    Set barycentric coordinate and element index of vertex at given index, and also update the position of the corresponding vertex. Barycentric coordinate is copied into another PdBary instance.
    
    Parameters:
    vertInd - Vertex index in vertex array.
    elemInd - Global element index where the vertex shall lie on.
    bary - Barycentric coordinates of vertex within the given element.
  - setVertexBary
```
public void setVertexBary(int vertInd,
                 PdBary bary)
```
    Set barycentric coordinate and element index of vertex at given index, and also update the position of the corresponding vertex. Element index is contained in parameter bary.
    
    Parameters:
    vertInd - Vertex index in vertex array.
    bary - Barycentric coordinates of vertex within the given element.
  - computeVertices
```
public void computeVertices()
```
    Compute all geometric vertex positions on the base surface from barycentric coordinates.
  - eval
```
public double eval(PdVector bary1,
          PdVector bary2,
          PdVector bary3,
          PiVector outelem,
          double step)
```
    Evaluates the polygon in given steps and returns the calculated points in order. For two consecutive points of the polygon, one of the following conditions must hold:
```
 - both are on the same element, or
 - one of them is on an edge or vertex of a neighbor of the other point's element, or
 - both are on an edge or vertex of elements that have at least one common neighbor.
 
```
    Parameters:
    bary1 - output: contains the first barycentric coordinate of all evaluated points
    bary2 - output: contains the second barycentric coordinate of all evaluated points
    bary3 - output: contains the third barycentric coordinate of all evaluated points
    outelem - output: element indices of all evaluated points
    step - stepsize in world metrics
    
    Returns:
    distance of last step (that is less than step)
  - eval
```
public int eval(PdVector[] bary,
       PiVector outelem,
       double stepSize)
```
    Evaluates the polygon in steps of given size. For two consecutive points of the polygon, one of the following conditions must hold: - both are on the same element, or - the second point is on an edge or vertex of a neighbor of the first point's element.
    
    Parameters:
    bary - output: bary[0], [1], [2] contain the first, second and third barycentric coordinates, respectively, of the evaluated points.
    outelem - output: corresponding element indices
    stepSize - in world metrics
    
    Returns:
    number of evaluated points
  - getPolygon
```
public PgPolygon getPolygon()
```
    Returns a polygon in world coordinates.
    
    Returns:
    polygon representation of this curve on success, otherwise null.
  - getPolygon
```
public boolean getPolygon(PgPolygon out)
```
    Returns a polygon in world coordinates.
    
    Parameters:
    out - Polygon representation of this curve
    
    Returns:
    true on success
  - swap
```
public PdBary swap(PgPolygonOnElementSet other,
          int pos,
          int otherPos,
          int num)
```
    Swaps a specified number of vertices in this polygon, beginning at the specified position, with vertices of the specified polygon. If necessary, the number of vertices of the polygons is increased.
    
    Parameters:
    other - other polygon
    pos - starting position in this PgPolygonOnElementSet
    otherPos - starting position in the other PgPolygonOnElementSet
    num - number of vertices to swap
    
    Returns:
    last swapped vertex of this polygon
  - swap
```
public void swap(int i,
        int j)
```
    Swap vertices pos and otherPos.
  - 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 assigned 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 PgPolygon
    
    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 PgPolygon
    
    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
  - setAccuracy
```
public void setAccuracy(double newacc)
```
    Sets the accuracy that is used at checks for zero in barycentric coordinates. (E.g. in exponential map computation. Setting this to a high value produces a straight geodesic that behaves more often as if it crosses a vertex.) Default is defined in static field BARYEPS.
  - flipOrientation
```
public void flipOrientation()
```
    Change orientation of the polygon by inverting the order of the vertices, i.e. the end point becomes the first point.
    
    Overrides:
    
    flipOrientation in class PgPolygon
  - projectCurveOntoElementSet
```
public static PdBaryDir[] projectCurveOntoElementSet(PgElementSet geom,
                                     PgPolygon curve,
                                     PdBary start,
                                     PgPolygonOnElementSet outCurve)
```
    Project a polygon onto the surface. All vertices of the projected polygon lie on edges of geom. Except if the polygon is not closed, then the first and last vertex lie in the inner of an element.
    
    Parameters:
    geom - Geometry.
    curve - Polygon in R^3.
    start - Barycentric coordinates as start position for the first vertex. This avoids a linear run over all elements of the geometry.
    outCurve - Will be filled with projected polygon. May be null.
    
    Returns:
    The edges of the output polygon on the elements of geom in barycentric coordinates. Null, if the projection fails.
  - projectCurveOntoElementSet
```
public static PdBaryDir[] projectCurveOntoElementSet(PgElementSet geom,
                                     PgPolygon curve,
                                     PgPolygonOnElementSet outCurve)
```
    Project a polygon onto the surface. All vertices of the projected polygon lie on edges of geom. Except if the polygon is not closed, then the first and last vertex lie in the inner of an element.
    
    Parameters:
    geom - Geometry.
    curve - Polygon in R^3.
    outCurve - Will be filled with projected polygon. May be null.
    
    Returns:
    The edges of the output polygon on the elements of geom in barycentric coordinates. Null, if the projection fails.
  - exp
```
public PdBaryDir exp(int iniElem,
            PdBary iniBary,
            PdBaryDir iniDir,
            double length)
```
    Deprecated. Use jvx.numeric.PnStraightestGeodesic .
    
    Makes discrete exponential map, i.e. the straightest geodesic from given initial values.
  - exp
```
public PdBaryDir exp(int iniElem,
            PdBary iniBary,
            PdBaryDir iniDir,
            double length,
            PgPolygon outpoly)
```
    Deprecated. Use jvx.numeric.PnStraightestGeodesic .
    
    Makes discrete exponential map, i.e. the straightest geodesic from given initial values.
    
    Parameters:
    iniElem - index of starting point's element
    iniBary - barycentric coordinates of the initial point
    iniDir - initial direction in barycentric notation
    length - Euclidean length of the geodesic is length*norm(iniDir)
    outpoly - if outpoly is not null the method puts the whole geodesic here
    
    Returns:
    null at an error; else the last barycentric direction that was used
  - getBary
```
public PdBary[] getBary()
```
    Deprecated. since JavaView 3.96.006, use getVertexBary() instead.
  - getBary
```
public PdBary getBary(int vertInd)
```
    Deprecated. since JavaView 3.96.006, use getVertexBary(int) instead.
  - getElemInd
```
public int getElemInd(int vertInd)
```
    Deprecated. since JavaView 3.96.006, use getVertexElemInd(int) instead.
  - getElemInd
```
public PiVector getElemInd()
```
    Deprecated. since JavaView 3.96.006, use getVertexElemInd(int) instead.
  - addPolygon
```
public void addPolygon(PgPolygonOnElementSet poly)
```
    Deprecated. since JavaView 3.95.004, use merge(PgGeometryIf).
  - setBary
```
public void setBary(int vertInd,
           int elemInd,
           PdBary bary)
```
    Deprecated. since JavaView 3.96.006, use setVertexBary(int, int, PdBary) instead.
  - setVertex
```
public void setVertex(int vertInd,
             int elemInd,
             PdBary bary)
```
    Deprecated. since JavaView 3.96.006, use setVertexBary(int, int, PdBary) instead.
  - setVertex
```
public void setVertex(int vertInd,
             PdBary bary)
```
    Deprecated. since JavaView 3.96.006, use setVertexBary(int, int, PdBary) instead.
  - updateVertices
```
public void updateVertices()
```
    Updates the Euclidean coordinates of the vertices from their barycentric coordinates.
  - 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 PgPolygon
    
    Returns:
    array with indices of new positions of vertices
    See Also:
    PgPointSet.removeMarkedVertices()
  - computeNormalCurvature
```
public void computeNormalCurvature()
```
    Compute the normal curvature of a surface mesh along a curve on the mesh. The result is stored in a scalar field that is added to the geometry.
  - getNormalCurvature
```
public static PgVectorField getNormalCurvature(PgPolygonOnElementSet polygon,
                               PdMatrix[] shapeOperator,
                               PgVectorField normCurvature)
```
    Compute the normal curvature of a surface mesh along a curve on the mesh. If the argument normCurvature is null, a new scalar field is created.
    
    Parameters:
    polygon - curve on the surface mesh
    shapeOperator - shape operator at each vertex of the surface mesh
    normCurvature - the computed curvature is stored in this scalar field on the curve
    
    Returns:
    PgVectorfield the given scalar field normCurvature is return
  - makeNormalsFromSurfaceNormals
```
public void makeNormalsFromSurfaceNormals()
```
    Create a (vertex-based) normal field along the curve from the (vertex-based) normal field of the surface.
  - makeNormalsFromSurfaceNormals
```
public static void makeNormalsFromSurfaceNormals(PgPolygonOnElementSet polygon)
```
    Create a (vertex-based) normal field along the curve from the (vertex-based) normal field of the surface.
    
    Parameters:
    polygon - polygon on which the normal field is created

Class PgPolygonOnElementSet

Field Summary

Fields inherited from class jv.geom.PgPolygon

Fields inherited from class jv.object.PsObject

Fields inherited from interface jv.project.PgGeometryIf

Constructor Summary

Method Summary

Methods inherited from class jv.geom.PgPolygon

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

BARYEPS

m_eps

Constructor Detail

PgPolygonOnElementSet

PgPolygonOnElementSet

Method Detail

init

toString

getGeometry

setGeometry

clone

copy

copyIntrinsicData

setMaxNumVertices

getVertexBary

getVertexBary

getVertexElemInd

getVertexElemInd

setVertexBary

setVertexBary

computeVertices

eval

eval

getPolygon

getPolygon

swap

swap

merge

blend

setAccuracy

flipOrientation

projectCurveOntoElementSet

projectCurveOntoElementSet

exp

exp

getBary

getBary

getElemInd

getElemInd

addPolygon

setBary

setVertex

setVertex

updateVertices

removeMarkedVertices

computeNormalCurvature

getNormalCurvature

makeNormalsFromSurfaceNormals

makeNormalsFromSurfaceNormals