[vtkusers] vtkPoints, vtkIdsList, JNI memory errors and Jeff Lee!

[Eugene Kim]

Hi Jeff,

  	Here is some test code that should illustrate my problem...  i've 
basically reproduced the offending lines of code and inserted it in to the 
Cone example for ease.  I also have some code which shows that the cell 
arrays in vtkPolyData do not work.  I've have had this happen on both vtk 
4.4 and 5.0, 5.0 being the version i currently use.  Also, don't mind the 
code that's commented out.  Some of it will produce more errors, (like 
vtkPoints), and some of it is harmless.





/* This test evaluates the feasability of accessing the data structures of 
a large number of objects */

import vtk.*;

public class Cone {

    static {
      System.loadLibrary("vtkCommonJava");
      System.loadLibrary("vtkFilteringJava");
      System.loadLibrary("vtkIOJava");
      System.loadLibrary("vtkImagingJava");
      System.loadLibrary("vtkGraphicsJava");
      System.loadLibrary("vtkRenderingJava");
    }

    public static void main (String []args) {
      System.out.println ( "Beginning test..." );

      /* The number of data sets we'd like to test, and it's path */
      int numObjects = 1;
      String fileName = "/spin/snl/data/mcell/eugene/pjm_13.reduce.vtk";

      vtkPolyData[] dataArray = new vtkPolyData[numObjects];
      vtkPolyDataReader[] readerArray = new vtkPolyDataReader[numObjects];

      for ( int i=0; i<numObjects; i++ ) {
  	    readerArray[i] = new vtkPolyDataReader();
  	    readerArray[i].SetFileName ( fileName );
  	    readerArray[i].Update();
  	    dataArray[i] = readerArray[i].GetOutput();
  	    dataArray[i].Update();
  	    System.out.println ( "Dataset "+i+" initialized" );
      }

      vtkCell theCell = null;
      int numCells = dataArray[0].GetNumberOfCells(); //Because they're all 
the same data set
      vtkIdList pointList = null;
      vtkPoints points = null;
      int numPoints;
      //vtkPoints finalPoints = new vtkPoints();
      //finalPoints.SetDataTypeToDouble();
      int theId;

      /* Just to illustrate that the convenience methods do not do anything 
*/
      System.out.println ( "Num verts: "+dataArray[0].GetNumberOfVerts() );
      System.out.println ( "Num polys: "+dataArray[0].GetNumberOfPolys() );
      System.out.println ( "Vert array: "+dataArray[0].GetVerts() );
      System.out.println ( "Poly array: "+dataArray[0].GetPolys() );

      double[] ids = new double[3];

      /* Typically here, the value i would represent the objects in the
       * array, but to illustrate the error that is not necessary.  At the
       * very least, we can get it to break by having an insane amount
       * of print statements below.  In this case 10000*10 statements,
       * while pointList is being assigned dataArray's pointId lists.
       * */
      for ( int i=0; i<10000; i++ ) {

        for ( int j=0; j<numCells; j++ ) {
  	theCell = dataArray[0].GetCell(j);
  	if ( j%10000 == 0 )
  		System.out.println ( "Dataset "+i+", cell "+j );
  	pointList = dataArray[0].GetCell(j).GetPointIds();
  	//points = dataArray[0].GetCell(j).GetPoints();
  	//numPoints = points.GetNumberOfPoints();

  	for ( int k=0; k<10; k++ ) {
  	  //points.GetPoint(k,ids);
  	  //points.GetPoint(k);
  	  //pointList.GetId(k);

  	  System.out.println ( i+" "+ids[0]+" "+ids[1]+" "+ids[2] );
  	  /*
  	  theId = pointList.GetId ( k );
  	  tempPoint = new Point3d ( points.GetPoint(k) );
  	  if ( theId+1 > finalPoints.size() )
  	    finalPoints.setSize ( theId+1 );
  	  if ( finalPoints.get ( theId ) == null )
  	    finalPoints.add ( theId, tempPoint );
  	  */
          }

        }
      }

      //System.out.println ( finalPoints.size() );

    }
}

Thanks again,
Eugene