Hi Jeff, Unfortunately the Chimera volume dialog won't tell you the exact height of the nodes on the histogram. I'll add that to the requested features list. Attached is a script that will print those values for the active volume in a format that can be used on other volumes with the "volume" command. File/Open tfunc.py, reply log shows: level -6.92021e-16,0 level 0.391341,0.99 level 0.581401,1 Command to use these levels on volume with id 3: volume #3 level -6.92021e-16,0 level 0.391341,0.99 level 0.581401,1 or on volumes 4 through 8: volume #4-8 level -6.92021e-16,0 level 0.391341,0.99 level 0.581401,1 The pairs of numbers are data value and "brightness" (= height on histogram, range 0-1). The numbers also appear in Chimera session files -- search for "solid_levels" to find them. Lastly, the heights of the intial 3 nodes are always 0, 0.99, and 1.0. Tom Jeff wrote:

hello,

is there a way for me to save the histogram transfer function that is displayed in Volume Viewer? I see that I can write down where the nodes are placed as these values appear in the "Level" dialog, but do not see a place to input magnitude (or write it down) of each node on the line. Ideally, I would just like to save it out, to apply the identical transform to multiple segmented areas of a volume.

thanks,

-jeff

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# ----------------------------------------------------------------------------- # Script to print the transfer function numbers for the active volume. # from VolumeViewer import active_volume v = active_volume() l = ' '.join(['level %g,%g' % lev for lev in v.solid_levels]) print l from Accelerators.standard_accelerators import show_reply_log show_reply_log()