[vtkusers] Possibly bug in vtkExtractSelectedFrustum ?

[Julian Ibarz]

Hello everyone,

I made a light program (in java but you could easily port it in C++ i think
and i need someone to try in C++ to be sure that it's not a Java binding
bug...) that use a vtkExtractSelectedFrustum but it does'nt work : the
output is always empty. Do you think the program is right ? If it is i think
it's a bug so i will make a report.

package org.jcae.vtk.test;

import javax.swing.JFrame;
import vtk.vtkActor;
import vtk.vtkCanvas;
import vtk.vtkConeSource;
import vtk.vtkDataSetMapper;
import vtk.vtkExtractSelectedFrustum;
import vtk.vtkPolyDataMapper;

public class BugFrustum {

    public static void main(String[] args)
    {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        vtkCanvas canvas = new vtkCanvas();
        vtkExtractSelectedFrustum selector = new
vtkExtractSelectedFrustum();

        // create sphere geometry
        vtkConeSource cone = new vtkConeSource();
        cone.SetHeight(3.0);
        cone.SetRadius(1.0);
        cone.SetResolution(10);
        // map to graphics objects
        vtkPolyDataMapper map = new vtkPolyDataMapper();
        map.SetInput(cone.GetOutput());

        // actor coordinates geometry, properties, transformation
        vtkActor aSphere = new vtkActor();
        aSphere.SetMapper(map);
        aSphere.GetProperty().SetColor(0, 0, 1); // color blue
        aSphere.GetProperty().SetRepresentationToWireframe();
        canvas.GetRenderer().AddActor(aSphere);

        frame.add(canvas);
        frame.setSize(800, 600);
        frame.setVisible(true);

        selector.CreateFrustum(new double[] {
            -10.,-10.,-10.,1.0,
            -10.,-10.,10.,1.0,
            -10.,10.,-10.,1.0,
            -10.,10.,10.,1.0,
            10.,-10.,-10.,1.0,
            10.,-10.,10.,1.0,
            10.,10.,-10.,1.0,
            10.,10.,10.,1.0,
        });

        selector.SetInput(cone.GetOutput());
        //UNCOMMENT TO CHECK THE BOUNDARIES
        //selector.ShowBoundsOn();
        // UNCOMMENT TO SEE THAT THE frustum extractor doesn't work inside
and outside the boundaries
        //selector.InsideOutOn();
        selector.Update();
        vtkActor actorFrustum = new vtkActor();
        vtkDataSetMapper mapFrustum = new vtkDataSetMapper();
        mapFrustum.SetInputConnection(selector.GetOutputPort());
        actorFrustum.SetMapper(mapFrustum);
        canvas.GetRenderer().AddActor(actorFrustum);

        canvas.lock();
        canvas.GetRenderer().ResetCamera();
        canvas.unlock();
        //UNCOMMENT TO SEE THAT THE CONE IS IN THE BOUNDARIES
        //canvas.GetRenderer().RemoveActor(aSphere);
    }
}


-- 
Julian Ibarz
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