hi again and thanks for your answer bill , ...
but i have to ask again.
>There are a couple of ways to create custom axis labels:
>1. Extend visad.java3d.DefaultDisplayRendererJ3D, and override its
>createSceneGraph() method to create your labels as part of your
>"box".
hm, sorry, but i have absolutely no idea how to do this. i already
took a look at the source code, but it didn't really help me. ok, i would
call super.createSceneGraph() in my subclass before doing something, but...
>2. Create your labels as VisADLineArrays and put them in
>ShapeControls for some RealType mapped to Display.Shape. There's
>an example in visad/bom/TrackManipulation.java.
>
>In a DisplayImplJ3D the "box" spans X, Y and Z coordinates from
-1.0
>to 1.0. You can use the visad.PlotText.render_label() method to
>help you draw text for your labels.
yes, i think i understood this, it's the creation you mentioned in
point one -isn't it?
but how dow create them "as part of my box"? i also don't know what
realtype i should use for mapping.
i tried the one i already mapped to the xaxis, but the labels where
plotted at the position of the data, of course. also a dummy realtype
doesn't really work, because they always seem to be plotted with a fixed y
value, so they don't stay on the x-axis when the plot is zoomed.
>
>> - secondly i want these labels to be interactive: if the users
clicks a
>> label, i want the corresponding 2D data to be displayed in a
seperate 2D
>> display.
>
>This is more difficult, but you can do it like this:
>
>You can construct a DisplayListener and add it to your
>DisplayImplJ3D. In its displayChanged(DisplayEvent e)
>method, if e.getId() == DisplayEvent.MOUSE_PRESSED (or
>MOUSE_PRESSED_LEFT, MOUSE_PRESSED_CENTER or
>MOUSE_PRESSED_RIGHT if you want to respond to a specific
>mouse button), get the cursor position by
>DisplayEvent.getX() and DisplayEvent.getY(). Then you must
>tranlate the cursor location into a ray in 3-D and figure
>out which label the user is pointing at. You'd do this
>something like:
>
> DisplayImplJ3D display = ...
> DisplayRenderer dr = display.getDisplayRenderer();
> MouseBehavior mouse = dr.getMouseBehavior();
> VisADRay direct_ray = behavior.findRay(cursor_x, cursor_y);
>
>Then use code similar to DisplayRendererJ3D.findDirect(direct_ray,
...)
>to figure out which label is closest to direct_ray (a 2-D cirsor
>location generates a 3-D ray).
>
>Note the DisplayRenderer.getMouseBehavior() method is new.
didn't try this one by now.
>
>Cheers,
>Bill
>
thanks again,
henner
