Package com.openinventor.meshvizxlm.extractors.cell

Class 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 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.