MxPolygonCellExtract Class Reference

Utility class for polygon cells. More...

#include <MeshVizXLM/extractors/MxPolygonCellExtract.h>

Static Public Member Functions
static void	getWeight (const MiGeometryI &meshGeometry, const MiSurfaceCell *polygonCell, const MbVec3d &point, std::vector< double > &weights)
	Gets the barycentric weights in the given polygon cell of the given point.
static double	getLongestEdgeLength (const MiGeometryI &meshGeometry, const MiSurfaceCell *polygonCell)
	Gets the longest edge of a polygon cell.
static double	getShortestEdgeLength (const MiGeometryI &meshGeometry, const MiSurfaceCell *polygonCell)
	Gets the shortest edge of a polygon cell.
static bool	isPointInsideCell (const MiGeometryI &meshGeometry, const MiSurfaceCell *polygonCell, const MbVec3d &point, std::vector< double > &weights)
	Checks if a point is inside the given polygon cell.
static double	getArea (const MiGeometryI &meshGeometry, const MiSurfaceCell *polygonCell)
	Computes the area of all planar or almost-planar irregular polygon (convex and concave).
static MbVec3d	getNormal (const MiGeometryI &meshGeometry, const MiSurfaceCell *polygonCell)
	Computes the average normal to the given planar or almost-planar polygon cell.

Detailed Description

Utility class for polygon cells.

Utility class that provides a static implementation of the MiVolumeCell interface methods for a polygon cell. This class is provided to make it easier to create a class that implements the MiVolumeCell interface for a polygon cell.

• Value of the weights (aka shape functions) in a polygon cell (see getWeight())
• Localization test (see isPointInsideCell())

Definition at line 48 of file MxPolygonCellExtract.h.

Member Function Documentation

getArea()

static double MxPolygonCellExtract::getArea ( const MiGeometryI &  meshGeometry, const MiSurfaceCell *  polygonCell  )

static

Computes the area of all planar or almost-planar irregular polygon (convex and concave).

Parameters

[in]	meshGeometry	The geometry of the mesh.
[in]	polygonCell	The input cell.

getLongestEdgeLength()

static double MxPolygonCellExtract::getLongestEdgeLength ( const MiGeometryI &  meshGeometry, const MiSurfaceCell *  polygonCell  )

static

Gets the longest edge of a polygon cell.

getNormal()

static MbVec3d MxPolygonCellExtract::getNormal ( const MiGeometryI &  meshGeometry, const MiSurfaceCell *  polygonCell  )

static

Computes the average normal to the given planar or almost-planar polygon cell.

This is done by using Newell's method.

Parameters

[in]	meshGeometry	The geometry of the mesh.
[in]	polygonCell	The input cell.

getShortestEdgeLength()

static double MxPolygonCellExtract::getShortestEdgeLength ( const MiGeometryI &  meshGeometry, const MiSurfaceCell *  polygonCell  )

static

Gets the shortest edge of a polygon cell.

getWeight()

static void MxPolygonCellExtract::getWeight ( const MiGeometryI &  meshGeometry, const MiSurfaceCell *  polygonCell, const MbVec3d &  point, std::vector< double > &  weights  )

static

Gets the barycentric weights in the given polygon cell of the given point.

This static method helps to implement the method MiCell::getWeight(meshGeometry,point,weights) for a polygon cell.

Note

Each node coordinate of the given cell is retrieved in the following way:

meshGeometry.getCoord(polygonCell->getNodeIndex(i)) 

for each i with 0 <= i < polygonCell->getNumNodes()

Parameters

[in]	meshGeometry	The geometry of the mesh.
[in]	polygonCell	The input cell.
[in]	point	The input point given in the same space coordinate as meshGeometry.
[out]	weights	This method computes the N values weights[0,N-1], where N=polygonCell->getNumNodes(). It assumes the weights vector array has been already allocated. Its size must be set to N (at least) before calling this method, using for instance the weights.resize(N)

isPointInsideCell()

static bool MxPolygonCellExtract::isPointInsideCell ( const MiGeometryI &  meshGeometry, const MiSurfaceCell *  polygonCell, const MbVec3d &  point, std::vector< double > &  weights  )

static

Checks if a point is inside the given polygon cell.

Note

Each node coordinate of the given cell is retrieved in the following way:

meshGeometry.getCoord(polygonCell->getNodeIndex(i)) 

for each i with 0 <= i < polygonCell->getNumNodes()

Parameters

[in]	meshGeometry	The geometry of the mesh.
[in]	polygonCell	The input cell.
[in]	point	The input point given in the same space coordinate as meshGeometry.
[out]	weights	This method computes the N values weights[0,N-1], where N=polygonCell->getNumNodes(). It assumes the weights vector array has been already allocated. Its size must be set to N (at least) before calling this method, using for instance the weights.resize(N)

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The documentation for this class was generated from the following file:

• MeshVizXLM/extractors/MxPolygonCellExtract.h