Visualization and getting range values for functions with domain dimension > 2

• To: "'visad-list@xxxxxxxxxxxxx'" <visad-list@xxxxxxxxxxxxx>
• Subject: Visualization and getting range values for functions with domain dimension > 2
• From: Elin Sivertsen <elins@xxxxxx>
• Date: Thu, 28 Aug 2003 09:52:51 +0200

Hello...

I have some data values coming from a function of type (x, y, z) -> w. The
domain values (R^3) are stored in an array of the form
float[3][7]. The range values are stored in an array float[1][7]. My goals
is to get the range value in each picked or chosen point, and 
view the surface as a 3d surface, w represented by color.
The following program does not give me the range value, and all I see is the
reference box and the colored cursor.

Could anybody give a hint?

Thanks,
     Elin.


 //Declarations
       x = RealType.getRealType("gridx", SI.meter, null);
       y = RealType.getRealType("gridy", SI.meter, null);
       z = RealType.getRealType("gridz", SI.meter, null);
       w = RealType.getRealType("gridw", SI.kelvin, null);
       
       domain = new RealTupleType(x, y, z);
       
       grid_type = new FunctionType(domain, w);
       
       //Cursor
       cursorCoords = new RealTuple(domain, new double[]{0.50, 0.50, 0.50});
       cursorDataRef = new DataReferenceImpl("cursorDataRef");
       cursorDataRef.setData(cursorCoords);
       
       
       
       DelaunayWatson delan = new DelaunayWatson(threeDSamples);
       domain_set = new Irregular3DSet(grid_type.getDomain(), threeDSamples,
null, null, null, delan);
       
       
       vals_ff = new FlatField(grid_type, domain_set);
       
       vals_ff.setSamples(fi_Samples, false);
       
      //Create a data reference and set the FlatField as our data
       data_ref  = new DataReferenceImpl("data_ref");
       data_ref.setData( vals_ff );
       
            
       CellImpl cell = new CellImpl(){
         public void doAction() throws RemoteException, VisADException{
           RealTuple coords = (RealTuple) cursorDataRef.getData();
           
           Real lon = (Real)coords.getComponent(0);
           Real lat = (Real)coords.getComponent(1);
           Real alt = (Real)coords.getComponent(2);
           
           double x = lon.getValue();
           double y = lat.getValue();
           double z = alt.getValue();
           
           System.out.println("Cursor at: (" + x + ", " +
                                               y + ", " +
                                               z +")");
           
           Linear3DSet new3DSet = new Linear3DSet(-20.0, 13.0, 33, 0.0,
45.0, 45, -16.0, 16.0, 32);
      
           int resampMode = Data.NEAREST_NEIGHBOR;
           int errorMode = Data.NO_ERRORS;
           FlatField temporField = (FlatField)vals_ff.resample(new3DSet,
resampMode, errorMode);
           
           double[][] tem1 = temporField.getValues();
           System.out.println("TEM1 " + tem1[0][0]);
           
           Real tem2 = (Real)vals_ff.evaluate(coords, resampMode,
errorMode);
           //System.out.println("RANGE " + tem2.getValue());
           System.out.println("RANGE " + tem2);
         }  
       };
       
       cell.addReference(cursorDataRef);
       
       
           
       
       // Create Display and its maps
      // A 2D display
       display = new DisplayImplJ3D("display1");
       
        // Get display's graphics mode control and draw scales
        GraphicsModeControl dispGMC
(GraphicsModeControl)display.getGraphicsModeControl();
        dispGMC.setScaleEnable(true);
        
      // Create the ScalarMaps: y to YAxis, x to XAxis and
    // z to ZAxis and temperature to RGB
    // Use ScalarMap(ScalarType scalar, DisplayRealType display_scalar)

   

    xMap = new ScalarMap(x, Display.XAxis);
    yMap = new ScalarMap(y, Display.YAxis);
    zMap = new ScalarMap(z, Display.ZAxis);
    wMap = new ScalarMap(w, Display.RGB);

    
  // Add maps to display

    display.addMap(xMap);
    display.addMap(yMap);
    display.addMap(zMap);
    
    display.addMap(wMap);
    
    ConstantMap[] cMaps = { new ConstantMap(1.0f, Display.Red),
                            new ConstantMap(0.0f, Display.Green),
                            new ConstantMap(0.0f, Display.Blue),
                            new ConstantMap(5.0f, Display.PointSize) };
       
              
    
    //Add reference to display
       display.addReferences( new DirectManipulationRendererJ3D(),
cursorDataRef, cMaps);
       display.addReference( data_ref );


               

---------------------------------------------------------------------
From: Elin R. Sivertsen---Elin.Sivertsen@xxxxxx
Title: CandScient
Place: IFE/OECD Halden Reactor Project
Department: Halden VR Centre

• Follow-Ups:
  • Re: Visualization and getting range values for functions with domain dimension > 2
    • From: Bill Hibbard