/**
* Return <CODE>true</CODE> if <CODE>type</CODE> is legal for this <CODE>DisplayRenderer</CODE>;
* for example, 2-D <CODE>DisplayRenderer</CODE>s use this to disallow mappings to <I>ZAxis</I>
* and <I>Latitude</I>.
*
* @param type The mapping type to check.
* @return <CODE>true</CODE> if <CODE>type</CODE> is legal.
*/
public boolean legalDisplayScalar(DisplayRealType type) {
// First check to see if it is a member of the default list
for (int i = 0; i < Display.DisplayRealArray.length; i++) {
if (Display.DisplayRealArray[i].equals(type)) return true;
}
// if we get here, it's not one of the defaults. See if it has
// a CS that transforms to a default that we know how to handle
if (type.getTuple() != null && type.getTuple().getCoordinateSystem() != null) {
RealTupleType ref = type.getTuple().getCoordinateSystem().getReference();
if (ref.equals(Display.DisplaySpatialCartesianTuple)
|| ref.equals(Display.DisplayRGBTuple)
|| ref.equals(Display.DisplayFlow1Tuple)
|| ref.equals(Display.DisplayFlow2Tuple)) return true;
}
return false;
}
/** create parallel coordinates display for data */
public static void parallel(DisplayImpl display, FlatField data)
throws VisADException, RemoteException {
FunctionType ftype = (FunctionType) data.getType();
RealType index = (RealType) ftype.getDomain().getComponent(0);
RealTupleType range = (RealTupleType) ftype.getRange();
int ncoords = range.getDimension();
int nrows = data.getLength();
Set index_set = data.getDomainSet();
float[][] samples = data.getFloats(false);
RealType x = RealType.getRealType("coordinate");
RealType y = RealType.getRealType("value");
SetType xy = new SetType(new RealTupleType(x, y));
FunctionType ptype = new FunctionType(index, xy);
FieldImpl pfield = new FieldImpl(ptype, index_set);
for (int j = 0; j < nrows; j++) {
float[][] locs = new float[2][ncoords];
for (int i = 0; i < ncoords; i++) {
locs[0][i] = i;
locs[1][i] = samples[i][j];
}
Gridded2DSet set = new Gridded2DSet(xy, locs, ncoords);
pfield.setSample(j, set, false);
}
// create a DataReference for river system
DataReference parallel_ref = new DataReferenceImpl("parallel");
parallel_ref.setData(pfield);
display.addMap(new ScalarMap(x, Display.XAxis));
display.addMap(new ScalarMap(y, Display.YAxis));
// enable axis scales
display.getGraphicsModeControl().setScaleEnable(true);
// link display to parallel display
display.addReference(parallel_ref);
}