Hi,
I have a given set of 3D-point and the x,y-coordinates of one point
somewhere in my set of points. I
want to interpolate the height of the point.
I want to add this point in my set and use the Delaunay-Triangulation of
VisAD.
Without this extra point the Delaunay Triangulation is working fine.
RealType x = RealType.getRealType("x");
RealType y = RealType.getRealType("y");
RealType height = RealType.getRealType("height");
try {
RealTupleType xy = new RealTupleType(x, y);
FunctionType terrain_type = new FunctionType(xy, height);
Irregular2DSet set = new Irregular2DSet(xy,new float[][]
{eastValues,northValues});
FlatField terrain = new FlatField(terrain_type, set);
terrain.setSamples(new float[][] {heightValues});
display = new DisplayImplJ3D("display1");
ScalarMap hoxmap = new ScalarMap(x, Display.XAxis);
ScalarMap reymap = new ScalarMap(y, Display.YAxis);
ScalarMap heightmap = new ScalarMap(height, Display.ZAxis);
display.addMap(hoxmap);
display.addMap(reymap);
display.addMap(heightmap);
hoxmap.setRange(-1.0, 1.0);
reymap.setRange(-1.0, 1.0);
heightmap.setRange(-1.0, 1.0);
DataReferenceImpl data_ref = new
DataReferenceImpl("data_ref");
data_ref.setData( terrain );
renderer = new DefaultRendererJ3D();
display.addReferences(renderer,data_ref);
display.addDisplayListener(listener);
}
catch (VisADException ve) {
System.out.println("VisAd TupleType Exception");
}
catch (RemoteException re) {
System.out.println("RemoteExcpetion");
}
How can I find the triangle in which the point belongs to?
Are there some standard geometric algorithms to achieve that?
Where do I have to look at.
Thanks for your help in advance
Desiree
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| Desiree Hilbring Institut fuer Photogrammetrie und Fernerkundung |
| Universitaet Karlsruhe, Germany |
| |
| email: hilbring@xxxxxxxxxxxxxxxxxxxx |
| # 0721 6083676 |
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