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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
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>From: Stuart Wier <wier@xxxxxxxxxxxxxxxx> >Organization: UCAR/Unidata >Keywords: 200008021437.e72Eb7T23720 Stu- >So there is no way to say "make data values of 0.0 always blue >wherever they occur"? If you knew the max/min range of the ScalarMap, you could determine which point was 0 and set that to Blue. >A more complex case is where you don't want colors evenly distributed >over the low, high range. For example, having a special and >rapidly changing list of distinctive colors associated with a narrow >range of data values of primary interest, imbedded in a larger (low, high) ran > ge >of lesser interest? For example in medical imagery >where you want to highlite a particular signal value. You can set whatever mapping you want for values, they don't have to be a linear shading of colors. I do this in my ImageViewer using McIDAS Enhancement tables to map colors to specific brightness values. I think Ugo does this for his topography displays as well. >I could achieve what I have in mind if there could be more than >one ScalarMap to Display.RGB per display, each with its own ColorControl >and a matching setRange() call, >or if the one ScalarMap could have several ColorControls, each ColorControl >with its own setRange(). You can map different RealTypes to Display.RGB and each will have it's own color control. I've done this for prototypes of combo radar/sat image displays, where each Data object (radar and image) has it's own ColorControl and I can set the enhancements individually. Don ************************************************************* Don Murray UCAR Unidata Program dmurray@xxxxxxxxxxxxxxxx P.O. Box 3000 (303) 497-8628 Boulder, CO 80307 ************************************************************* Unidata WWW Server http://www.unidata.ucar.edu/ McIDAS Demonstration Machine http://mcdemo.unidata.ucar.edu/ *************************************************************
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