MxPolyhedronCellExtract Class Reference
[Cell]

Utility class for polyhedron cells. More...

#include <MeshVizXLM/extractors/MxPolyhedronCellExtract.h>

List of all members.

Static Public Member Functions
static void	getWeight (const MiGeometryI &meshGeometry, const MiVolumeCell *polyhedronCell, const MbVec3d &point, std::vector< double > &weights)
static double	getLongestDistance (const MiGeometryI &meshGeometry, const MiVolumeCell *polyhedronCell)
static double	getShortestDistance (const MiGeometryI &meshGeometry, const MiVolumeCell *polyhedronCell)
static bool	isPointInsideCell (const MiGeometryI &meshGeometry, const MiVolumeCell *polyhedronCell, const MbVec3d &point, std::vector< double > &weights)
static MbVec3d	getFacetNormal (size_t facet, const MiGeometryI &meshGeometry, const MiVolumeCell *polyhedronCell)

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Detailed Description

Utility class for polyhedron cells.

Utility class that provides a static implementation of the MiVolumeCell's methods for a polyhedron cell. This class is provided to make easier the creation of a class that implements the MiVolumeCell interface for a polyhedron cell.

• value of the weights (aka shape functions) in a polyhedron cell (see getWeight())
• localization test (see isPointInsideCell())

This implementation of getWeight() method assumes that a polyhedron is defined as a set of oriented polygons such that their normal is pointing to the inside ( each facet vertices are ordered in an counter-clockwise direction looking from the inside).

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Member Function Documentation

static MbVec3d MxPolyhedronCellExtract::getFacetNormal	(	size_t	facet,
		const MiGeometryI &	meshGeometry,
		const MiVolumeCell *	polyhedronCell
	)			[static]

Computes the average normal to a planar or almost-planar polygon facet of a the given polyhedron cell.

This is done by using Newell's method.

Parameters:

[in]	facet	The number of the facet in the polyhedron cell.
[in]	meshGeometry	The geometry of the mesh.
[in]	polyhedronCell	The input cell.

static double MxPolyhedronCellExtract::getLongestDistance	(	const MiGeometryI &	meshGeometry,
		const MiVolumeCell *	polyhedronCell
	)			[static]

Gets the longest distance inside the given polyhedron cell.

Parameters:

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

static double MxPolyhedronCellExtract::getShortestDistance	(	const MiGeometryI &	meshGeometry,
		const MiVolumeCell *	polyhedronCell
	)			[static]

Gets the shortest distance inside the given polyhedron cell.

Parameters:

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

static void MxPolyhedronCellExtract::getWeight	(	const MiGeometryI &	meshGeometry,
		const MiVolumeCell *	polyhedronCell,
		const MbVec3d &	point,
		std::vector< double > &	weights
	)			[static]

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

Note:

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

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

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

Parameters:

[in]	meshGeometry	The geometry of the mesh.
[in]	polyhedronCell	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=polyhedronCell->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)

static bool MxPolyhedronCellExtract::isPointInsideCell	(	const MiGeometryI &	meshGeometry,
		const MiVolumeCell *	polyhedronCell,
		const MbVec3d &	point,
		std::vector< double > &	weights
	)			[static]

Checks if a point is inside the given polyhedron cell.

All weights must be positive. This static method helps to implement the method MiCell::isPointInsideCell(meshGeometry,point,weights) for a polyhedron cell.

Note:

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

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

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

Parameters:

[in]	meshGeometry	The geometry of the mesh.
[in]	polyhedronCell	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=polyhedronCell->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/MxPolyhedronCellExtract.h