Hi, All
Sorry for asking this question again. I followed instructions from Bill and Don, and I used the following code (partial list) to draw some texts.
RealType shape = new RealType("shape");
ScalarMap shape_map = new ScalarMap(shape, Display.Shape);
display.addMap(shape_map);
RealTupleType coord_type = new RealTupleType(longitude,latitude,elevation,shape);
double[] start = {0.0, 0.0, 0.0};
double[] base = {0.3, 0.0, 0.0};
double[] up = {0.0, 0.3, 0.0};
boolean center = false;
PlotText pt = new PlotText();
VisADLineArray shape1 = pt.render_label("My text is here", start, base, up, center);
//shape2
//shape3
VisADGeometryArray[] shapes = new VisADGeometryArray[] {shape1,shape2,shape3};
ShapeControl shape_control = (ShapeControl) shape_map.getControl();
shape_control.setScale(0.2f);
shape_control.setShapeSet(new Integer1DSet(3));
shape_control.setShapes(shapes);
I also used the following code to specify the location for the text and add the shapes to display:
RealTuple coord_tuple = new RealTuple(coord_type, new double[] {samp2[0][0],samp2[1][0],fResult2[0],0});
DataReferenceImpl ref_coord_tuple = new DataReferenceImpl("ref_coord_tuple");
ref_coord_tuple.setData(coord_tuple);
display.addReference(ref_coord_tuple,streetColor);
The code worked for me. The text is displayed at the given location (in this case, samp2[0][0],samp2[1][0],fResult2[0])as we can see from Test 45 and Test 69, i.e., the text is dsiplayed parallel to x-axis and I can read it as output from any System.out.println.
Now, I want to display the text with any specific angles to x, y and z axis. for example, I want to display text with 50 degrees to x-axis, 100 degrees to y-axis, and 260 degrees to z-axis. I do not know how to set start, base and up in this case.
Thanks a lot.
Gaoming Fu
