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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Bill- Bill Hibbard wrote:
I'm a little confused. Using ScreenLockedRendererJ3D will fix the position of the image relative to the screen, rather than the display axes. If your Data were a simple geometry rather than an image, you could display it as a Shape and use ConstantMaps to the XAxis, YAxis and ZAxiswill fix it relative to the axes.
Sorry for the confusion. I'm doing what you say for our color scales for which I generate the geometry. I guess I was wondering if there was a way to take an image and generate some sort of geometry from it that i could then use in the manner you describe. I think the only way to
fix an image relative to the axes is to use ScalarMapListeners added to the spatial ScalarMaps, to listen for AUTO_SCALE and MANUAAUTO_SCALEL ScalarMapEvents, and adjust the object position and scale appropriately. Fortunately these events do not generally vary frequently or continuously, so you can probably just recompute a new domain Set for your image FlatField. Each time you construct a new FlatField, call its setSamples() method with copy = false so you can reuse the same pixel array.
Okay, let's try this again. I have an image. If I read it in as a FlatField, then I'd have something like (Element, Line) -> (R, G, B). What I don't want to do is have to render it in the normal way (i.e, map element and line to axes and r,g,b to their corresponding display types), but rather was hoping that I could generate a geometry, that I could then position in the display. I figured eventually, VisAD must make some sort of geometry out of the image to put it in the display based on the scalarmaps. I was just wondering if I could go from image -> geometry and then use the ScreenLockedRenderer to put it somewhere in the display. Or, maybe I'm the one that's confused and am asking for something that can't be done. ;-) Don ************************************************************* Don Murray UCAR Unidata Program dmurray@xxxxxxxxxxxxxxxx P.O. Box 3000 (303) 497-8628 Boulder, CO 80307 http://www.unidata.ucar.edu/staff/donm "There's someone in my head, but it's not me" Roger Waters *************************************************************
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