Package com.openinventor.meshvizxlm.extractors.cell

Class MxPolyhedronCellExtract

java.lang.Object
com.openinventor.meshvizxlm.extractors.cell.MxPolyhedronCellExtract
public class MxPolyhedronCellExtract extends 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 Details

    • 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.