Diaplay problem

• To: visad-list@xxxxxxxxxxxxx
• Subject: Diaplay problem
• From: karan kapoor <visad_guy@xxxxxxxxx>
• Date: Mon, 16 Jul 2001 04:42:09 -0700 (PDT)

   Hi bill,


We are able to get the position of the mouse click
using PointManipulationRendererJ3D. We want to display
a tuple at the place of a mouse click and when we set
the data to the reference of the
PointManipulationRenderer the point is not displayed
.But if added to a new reference the point is
displayed only at the edges. Please, suggest us in
achieving this.

thanks 
karan

Here is the code

======================================================

import visad.*;
import visad.java2d.DisplayImplJ2D;
import visad.java3d.*;
import java.rmi.RemoteException;
import javax.swing.*;
import visad.java2d.*;
import javax.media.j3d.*;
import java.util.*;
import java.awt.event.*;
import visad.bom.PointManipulationRendererJ3D;


public class DrawGeometry2 extends Object {
    RealType row, column, index;
    RealTupleType domain_tuple;
    DisplayImpl display;
    ScalarMap rowMap, colMap;
    DataReferenceImpl data_ref;
    DisplayRenderer dr;
    String ag[];
    DataReferenceImpl d_ref;
    private static final int N = 64;
    float dx, dy;
    RealTuple rt;
    
    
    /** Creates new DrawGeometry2 */
    public DrawGeometry2() {
    }
    
    public void displayGrid() throws RemoteException,
VisADException {
        row = new RealType("X", SI.meter, null);    
        column = new RealType("Y", SI.meter, null);
        domain_tuple = new RealTupleType(row, column);
        
        RealType index = new RealType("index");
        
        FunctionType func_type = new
FunctionType(domain_tuple, index);
        
        Integer2DSet integer_set = new
Integer2DSet(domain_tuple, N, N);
        
        FlatField field = new FlatField(func_type,
integer_set);
      
        display = new DisplayImplJ3D("display1");
        
        dr = display.getDisplayRenderer();
        dr.setBoxOn(false);
                     
        GraphicsModeControl dispGMC
(GraphicsModeControl)
display.getGraphicsModeControl();
  
        rowMap = new ScalarMap( row, Display.XAxis );
        colMap = new ScalarMap( column, Display.YAxis
);
           
        display.addMap(colMap);      
        display.addMap(rowMap);
        
        float[][] values = new float[1][N * N];
        int k = 0;
        for (int i=0; i<N; i++) {
            for (int j=0; j<N; j++) {
                values[0][k++] = (i - N / 2) * (j - N
/ 2);
            }
        }
        
        ConstantMap[] colMap = { new ConstantMap(
0.0f, Display.Red ),
        new ConstantMap( 0.0f, Display.Green ),
        new ConstantMap( 0.0f, Display.Blue ) };
        
        field.setSamples(values);
        DataReferenceImpl data_ref = new
DataReferenceImpl("field");
        data_ref.setData(field);
        display.addReference(data_ref, colMap);
        
        RealTuple dummy_rt = new
RealTuple(domain_tuple, new double[] {Double.NaN,
Double.NaN});
        final DataReferenceImpl ref = new
DataReferenceImpl("rt");
        ref.setData(dummy_rt);
       
        final ConstantMap[] pointsCol = {     new
ConstantMap( 1.0f, Display.Red),
                                     new ConstantMap( 1.0f, Display.Green),
                                     new ConstantMap(
1.0f, Display.Blue), 
                                     new ConstantMap( 10.0f,
Display.PointSize)};

        
        int m = (ag.length > 1) ? InputEvent.CTRL_MASK
: 0;                             
        display.addReferences(new
PointManipulationRendererJ3D(row, column, m, m), ref,
pointsCol);
       
        
        CellImpl cell = new CellImpl() {
            public void doAction() throws
VisADException, RemoteException {
                rt = (RealTuple) ref.getData();
                dx = (float)((Real)
rt.getComponent(0)).getValue();
                dy = (float)((Real)
rt.getComponent(1)).getValue();
                if (dx == dx && dy == dy) {
                    System.out.println("point (" + dx
+ ", " + dy + ")");
                                        
                    
                } 
                                 
            }
           
           
        };
        
        cell.addReference(ref); 
      
      final DataReferenceImpl  d_ref = new
DataReferenceImpl("d_ref");
      display.addDisplayListener(new DisplayListener()
{
            public void displayChanged(DisplayEvent e)
throws RemoteException, VisADException {
               
                if(e.getId() =
DisplayEvent.MOUSE_RELEASED_RIGHT) { 
                    System.out.println("right
pressed");
                    d_ref.setData(rt);
                    display.addReference(d_ref);
                }
            }
      });
     
        JFrame jframe = new JFrame("2D Grid");
       
jframe.getContentPane().add(display.getComponent());
       
        jframe.setSize(400, 400);
        jframe.setVisible(true);
        
        jframe.addWindowListener(new
java.awt.event.WindowAdapter() {
                  public void
windowClosing(java.awt.event.WindowEvent evt) {
                      System.exit(0);
                  }
              }
        );
       
    }
    
    public static void main(String args[]) {
        DrawGeometry2 g = new DrawGeometry2();
        g.ag = args;
        try {
            g.displayGrid();
        } catch (Exception e) {
            e.printStackTrace();
        }
        
    }

}
-=====================================================


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