com.openinventor.meshvizxlm.extractors.cell

Class MxPolyhedronCellExtract

java.lang.Object

com.openinventor.meshvizxlm.extractors.cell.MxPolyhedronCellExtract

public class MxPolyhedronCellExtract
extends java.lang.Object

Utility class for polyhedron cells.

Utility class that provides a static implementation of the MiVolumeCell 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.

Localization test
See isPointInsideCell(MiGeometryI, MiVolumeCell, double[], double[])

This implementation 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).

Method Summary

Modifier and Type	Method and Description
static double	getLongestDistance(MiGeometryI meshGeometry, MiVolumeCell polyhedronCell) Gets the longest distance inside the given polyhedron cell.
static double	getShortestEdgeLength(MiGeometryI meshGeometry, MiVolumeCell polyhedronCell) Gets the shortest distance inside the given polyhedron cell.
static boolean	isPointInsideCell(MiGeometryI meshGeometry, MiVolumeCell polyhedronCell, double[] point, double[] weights) Checks if a point is inside the given polyhedron cell.

Methods inherited from class java.lang.Object

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

Method Detail

getLongestDistance

public static double getLongestDistance(MiGeometryI meshGeometry,
                                        MiVolumeCell polyhedronCell)

Gets the longest distance inside the given polyhedron cell.

Parameters:

meshGeometry - The geometry of the mesh.

polyhedronCell - The input cell.

Returns:

the longest distance

getShortestEdgeLength

public static double getShortestEdgeLength(MiGeometryI meshGeometry,
                                           MiVolumeCell polyhedronCell)

Gets the shortest distance inside the given polyhedron cell.

Parameters:

meshGeometry - The geometry of the mesh.

polyhedronCell - The input cell.

Returns:

the shortest distance

isPointInsideCell

public static boolean isPointInsideCell(MiGeometryI meshGeometry,
                                        MiVolumeCell polyhedronCell,
                                        double[] point,
                                        double[] weights)

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(MiGeometryI, double[], double[]) for a polyhedron cell.

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

  for each i with 0 <= i < polyhedronCell.getNumNodes()
   nodeIndex = polyhedronCell.getNodeIndex(i)
   meshGeometry.getX(nodeIndex)
   meshGeometry.getY(nodeIndex)
   meshGeometry.getZ(nodeIndex)
 
 

Parameters:

meshGeometry - The geometry of the mesh.

polyhedronCell - The input cell.

point - The input point given in the same space coordinate as meshGeometry.

weights - The array into which the weight values are to be stored.This method computes the N values weights[0,N-1], where N=polygonCell.getNumNodes(). It assumes the weights array has been already allocated. Its size must be set to N (at least) before calling this method.