Re: 3D Vector plot

• To: Bill Hibbard <billh@xxxxxxxxxxxxx>, visad-list@xxxxxxxxxxxxx
• Subject: Re: 3D Vector plot
• From: John Osborne <oz@xxxxxxxxxxxxx>
• Date: Fri, 06 Sep 2002 09:00:12 -0700

The first thing I tried was rotating the plot--it's still just a planar
vector plot. I have also looked at the wvals and confirmed that they aren't
0.0 as well. But if you see nothing wrong in my logic than I must have a 0
values w component. I'll explicitly set them to a constant and see what
happens.

oz

Bill Hibbard wrote:

> Hi John,
>
> I just tried a quick experiment with a 3-D vector display
> and it worked OK. To see the Z component of your vectors,
> you need to rotate the display to look at the vector plane
> from the side. The only thing I can think of, if you don't
> see any Z components, is that the wvals in your program
> are all 0.0.
>
> Good luck,
> Bill
>
> On Thu, 5 Sep 2002, John Osborne wrote:
>
> > I am trouble producing a 3D vector plot with VisAD. In this case my
> > u,v,w components are defined on the same x,y grid. What I get is a
> > plane showing what I assume is the u,v vector inside a 3D cube--can't
> > see any effect of the w component. Thanks in adbance. This is what I'm
> > doing:
> >
> > X = new RealType(xtypeName, null, null);
> > Y = new RealType(ytypeName, null, null);
> > domain_tuple = new RealTupleType(Y, X);
> > U = new RealType(utypeName, null, null);
> > V = new RealType(vtypeName, null, null);
> > W = new RealType(wtypeName, null, null);
> > range_tuple = new RealTupleType(U, V, W);
> > func_domain_range = new FunctionType(domain_tuple, range_tuple);
> >
> > // Create the domain Set
> > domain_set = new Linear2DSet(domain_tuple, yArray[0], yArray[ySize-1],
> > ySize, xArray[0], xArray[xSize-1], xSize);
> > float[][] set_samples = domain_set.getSamples(true);
> > float[][] flat_samples = new float[3][xSize * ySize];
> >
> > count = 0;
> > for(int i=0; i < xSize; i++) {
> >    for(int j=0; j < ySize; j++) {
> >       double uval = uArray[count];
> >       double vval = vArray[count];
> >       double wval = wArray[count];
> >       flat_samples[0][count] = (float)uval;
> >       flat_samples[1][count] = (float)vval;
> >       flat_samples[2][count] = (float)wval;
> >       count++;
> >     }
> > }
> >
> > vals_ff = new FlatField(func_domain_range, domain_set);
> > vals_ff.setSamples(flat_samples, false);
> >
> > // A 3D display
> > display = new DisplayImplJ3D("display1");
> >
> > // Create the X,Y ScalarMaps
> > yMap = new ScalarMap(Y, Display.YAxis);
> > xMap = new ScalarMap(X, Display.XAxis);
> > xRangeMap = new ScalarMap(X, Display.SelectRange);
> > yRangeMap = new ScalarMap(Y, Display.SelectRange);
> >
> > // Add X,Y maps to display
> > display.addMap(yMap);
> > display.addMap(xMap);
> > display.addMap(xRangeMap);
> > display.addMap(yRangeMap);
> >
> > // "u" component
> > uMap = new ScalarMap(U, Display.Flow1X);
> > uRangeMap = new ScalarMap(U, Display.SelectRange);
> > display.addMap(uRangeMap);
> > display.addMap(uMap);
> >
> > // "v" component
> > vMap = new ScalarMap(V, Display.Flow1Y);
> > vRangeMap = new ScalarMap(V, Display.SelectRange);
> > display.addMap(vRangeMap);
> > display.addMap(vMap);
> >
> > // "w" component
> > wMap = new ScalarMap(W, Display.Flow1Z);
> > wRangeMap = new ScalarMap(W, Display.SelectRange);
> > display.addMap(wRangeMap);
> > display.addMap(wMap);
> >
> > selXRange = new SelectRangeWidget(xRangeMap);
> > selYRange = new SelectRangeWidget(yRangeMap);
> >
> > // Create a data reference and set the FlatField as our data
> > data_ref = new DataReferenceImpl("data_ref");
> > data_ref.setData(vals_ff);
> >
> > // Add reference to display
> >     display.addReference(data_ref);
> >
> >

• Follow-Ups:
  • Re: 3D Vector plot
    • From: Tom Whittaker
  • Re: 3D Vector plot
    • From: John Osborne

• References:
  • Re: How to link the change to RangeWidget with SelectRangeWidget?
    • From: Bill Hibbard