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Hi Adityarajsingh,
I cannot see any cause for the behavior you describe, but
I see one suspicious statement:
float[][] set_samples = domain_set.getSamples( false );
The set_samples array is not used in the code you provide,
but since you used the copy = false option in getSamples()
if your code modified the values in the set_samples array
that could cause the behavior you describe. If you used
set_samples in place of flat_samples, for example, that
could cause this behavior.
Good luck,
Bill
On Fri, 3 Dec 2004, Adityarajsingh Santokhee wrote:
>
> Hello,
>
> I have recently started using the VisAD Graphics API. I have tried Ugo Taddei
> examples and the tutorials and found them very useful.
>
> My problem is as follows. I am trying to do a simple animation of a surface :
> (lat,lon)->temperature. My objective is to see how temperature of the surface
> changes over time. I have been testing with the "infinite loop example"
> calling
> FlatField.setSamples(float [][] samples) to update the display.
>
> I am getting some results. However, the problem is that the graph is moving
> along the x-axis with each new frame. This is the subroutine I am using.
>
>
>
> public void displayData(float [][] myData) throws RemoteException,
> VisADException {
>
> // Create the quantities
> // Use RealType(String name);
>
> latitude = RealType.getRealType("latitude");
> longitude = RealType.getRealType("longitude");
>
> domain_tuple = new RealTupleType(latitude, longitude);
> temperature = RealType.getRealType("temperature");
>
>
> // Create a FunctionType (domain_tuple -> temperature )
> // Use FunctionType(MathType domain, MathType range)
>
> func_domain_temp = new FunctionType( domain_tuple, temperature);
> // func_t_range = new FunctionType(minute, func_domain_temp );
>
>
> // Create the domain Set
> // Use LinearDSet(MathType type, double first1, double last1, int lengthX,
> // double first2, double last2, int
> lengthY)
>
> int NCOLS = 89;
> int NROWS = 105;
>
> // domain_set = new Linear2DSet(domain_tuple, -Math.PI, Math.PI, NROWS,
> // -Math.PI, Math.PI,
> NCOLS);
>
> domain_set = new Linear2DSet(domain_tuple, 46, 59, NROWS, -7, 3, NCOLS);
>
>
> int tSamples = 10;
>
>
> // Get the Set samples to facilitate the calculations
>
> float[][] set_samples = domain_set.getSamples( false );
>
>
> // The actual temperature values are stored in this array
> // float[1][ number_of_samples ]
>
> float[][] flat_samples = new float[1][NCOLS * NROWS];
>
> // We fill our 'flat' array with the generated values
> // by looping over NCOLS and NROWS
>
> // Create the FlatFields
> // Use FlatField(FunctionType type, Set domain_set)
>
> // For the colored image
>
>
> int pos=0, temp=0, count=0;
>
>
> for(int c = 0; c < NCOLS; c++)
> {
> for(int r = 0; r < NROWS; r++)
> {
> pos = (NCOLS * r) + c ;
> flat_samples[0][count] = myData[0][pos];
> count++;
> }
> }
>
> // ...and put the values above into it
> // Note the argument false, meaning that the array won't be copied
>
> vals_ff = new FlatField( func_domain_temp, domain_set);
> vals_ff.setSamples( flat_samples );
>
>
> // Get the values from the temperature FlatField
> // create flat_isoVals array for clarity's sake
> // "false" argument means "don't copy"
>
>
> // Create Display and its maps
> // A 2D display
>
> display = new DisplayImplJ2D("display1");
>
> // Get display's graphics mode control and draw scales
>
> GraphicsModeControl dispGMC = (GraphicsModeControl)
> display.getGraphicsModeControl();
> dispGMC.setScaleEnable(true);
>
>
> // Create the ScalarMaps: latitude to YAxis, longitude to XAxis and
> // temperature to RGB and
> // isoTemperature to IsoContour
> // Use ScalarMap(ScalarType scalar, DisplayRealType display_scalar)
>
> latMap = new ScalarMap( latitude, Display.YAxis );
> lonMap = new ScalarMap( longitude, Display.XAxis );
> tempRGBMap = new ScalarMap( temperature, Display.RGB );
>
>
> // Add maps to display
>
> display.addMap( latMap );
> display.addMap( lonMap );
> display.addMap( tempRGBMap );
>
>
> // Create data references and set the FlatField as our data
>
> data_ref = new DataReferenceImpl("data_ref");
> data_ref.setData( vals_ff );
> display.addReference( data_ref );
>
>
> // Create application window and add display to window
>
> JFrame jframe = new JFrame("Example");
> jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
> jframe.getContentPane().add(display.getComponent());
>
>
> // Set window size and make it visible
> jframe.setSize(300, 300);
> jframe.setVisible(true);
>
>
> // index to count time step
> int index=0;
> count = 0;
>
> // Loop forever, changing the samples array every time
> while(true){
> try{
>
> for (int t=0; t<tSamples; t++)
> {
> for(int c = 0; c < NCOLS; c++)
> {
> for(int r = 0; r < NROWS; r++)
> {
> pos = (NCOLS * r) + c + temp;
> flat_samples[0][count] = myData[0][pos];
> count++;
> }
> }
> count = 0;
> temp = pos;
>
> // ...and put the values above into it
> // Note the argument false, meaning that the array won't be
> copied
>
> vals_ff.setSamples( flat_samples);
>
> //index++;
> Thread.sleep(500);
> }
> count = 0;
> temp = 0;
>
>
> }
> catch (InterruptedException ie){
> ie.printStackTrace();
> }
>
>
> }
>
> }
> }
>
>
> Any ideas ?
>
> Thanks in advance.
>
> Adit.
>
>
>
>
> -----------------------------------------------------------------------
> Adityarajsingh Santokhee Tel: +44 118 378 5213 (direct line)
> eScience Data Manager Tel: +44 118 378 8741 (ESSC)
> Reading e-Science Centre Fax: +44 118 378 6413
> ESSC Email: ads@xxxxxxxxxxxxxxxxxxxx
> University of Reading
> 3 Earley Gate
> Reading RG6 6AL, UK
>
> -----------------------------------------------------------------------
>
> ----------------------------------------------------------------
> This message was sent using IMP, the Internet Messaging Program.
>
> ----- End forwarded message -----
>
>
> -----------------------------------------------------------------------
> Adityarajsingh Santokhee Tel: +44 118 378 5213 (direct line)
> eScience Data Manager Tel: +44 118 378 8741 (ESSC)
> Reading e-Science Centre Fax: +44 118 378 6413
> ESSC Email: ads@xxxxxxxxxxxxxxxxxxxx
> University of Reading
> 3 Earley Gate
> Reading RG6 6AL, UK
>
> -----------------------------------------------------------------------
>
> ----------------------------------------------------------------
> This message was sent using IMP, the Internet Messaging Program.
>
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