[vtkusers] Question on the usage of vtkPanel with Java

[TINGAUD Frederic]

Hi all,

 

I am trying to use the vtkPanel for Java on Windows, to create a simple
test. I use the code you can see thereafter. You can notice a commented
out panel.Render(). While it is commented out, the code works well, but
the resulting graph will have ugly aliasing. If I uncomment the
panel.Render() that is just before setting my JFrame to visible, two
differences will be visible:

-          The graph is way nicer, with smooth edges and faster drawings
(I see it when doing time consuming operations like multiple AAFrames).

-          One time out of 10, I will have a "ChoosePixelFormat failed"
error and the application will crash.

 

I assume that calling CreateWindow from vtkWin32OpenGLRenderWindow.cxx
achieves way better results than letting Java do it, but I am wondering
whether it is possible to obtain the same nice rendering while letting
the JFrame do the win32 call and if I can protect myself in any way
against the choosePixelFormat error?

 

Regards,

 

Frederic

 

package murex.gui.component.chart3d;

 

import javax.swing.JFrame;

 

import vtk.vtkActor;

import vtk.vtkCubeAxesActor;

import vtk.vtkDelaunay2D;

import vtk.vtkNativeLibrary;

import vtk.vtkPanel;

import vtk.vtkPoints;

import vtk.vtkPolyData;

import vtk.vtkPolyDataMapper;

import vtk.vtkRenderer;

 

public class minimalTest {

    // Load VTK library and print which library was not properly loaded

    static {

        if(!vtkNativeLibrary.LoadAllNativeLibraries()) {

            for(vtkNativeLibrary lib : vtkNativeLibrary.values()) {

                if(!lib.IsLoaded()) {

                    System.out.println(lib.GetLibraryName() + " not
loaded");

                }

            }

        }

        vtkNativeLibrary.DisableOutputWindow(null);

    }

 

    public static void main(String args[]) {

        try {

            javax.swing.SwingUtilities.invokeLater(new Runnable() {

                @Override

                public void run() {

                    createVtkPanel();

                }

            });

        } catch(Exception e) {

            e.printStackTrace();

        }

    }

 

    /**

     * @param panel

     */

    static void createVtkPanel() {

        JFrame mainFrame = new JFrame();

        vtkPanel panel = new vtkPanel();

        vtkRenderer renderer = panel.GetRenderer();

 

        vtkPoints points = getPoints();

 

        vtkPolyData polyData = new vtkPolyData();

        polyData.SetPoints(points);

 

        vtkDelaunay2D delaunay = new vtkDelaunay2D();

        delaunay.SetInputData(polyData);

 

        vtkPolyDataMapper mapper = new vtkPolyDataMapper();

        mapper.SetInputConnection(delaunay.GetOutputPort());

 

        vtkActor surfaceActor = new vtkActor();

        surfaceActor.SetMapper(mapper);

        renderer.AddActor(surfaceActor);

 

        vtkCubeAxesActor cubeAxesActor = new vtkCubeAxesActor();

        cubeAxesActor.SetCamera(renderer.GetActiveCamera());

        cubeAxesActor.SetBounds(points.GetBounds());

        renderer.AddActor(cubeAxesActor);

 

        renderer.ResetCamera();

        mainFrame.add(panel);

        mainFrame.setSize(600, 600);

//        panel.Render();

        mainFrame.setVisible(true);

        panel.Render();

    }

 

    /**

     * @return data to plot.

     */

    static vtkPoints getPoints() {

        vtkPoints points = new vtkPoints();

        points.InsertNextPoint(0.5, 0, 0.);

        points.InsertNextPoint(1, 0, 1.);

        points.InsertNextPoint(2, 0, 0.4);

        points.InsertNextPoint(3, 0, 0.5);

        points.InsertNextPoint(0.5, 1, 0.3);

        points.InsertNextPoint(1, 1, 0.3);

        points.InsertNextPoint(2, 1, 0.8);

        points.InsertNextPoint(3, 1, 0.6);

        points.InsertNextPoint(0.5, 2, 0.5);

        points.InsertNextPoint(1, 2, 0.8);

        points.InsertNextPoint(2, 2, 0.3);

        points.InsertNextPoint(3, 2, 0.4);

        return points;

    }

}

 

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