reverse palettes not working correctly for color-by-value without specified range

[Elaine Meng]

open 2gbp
color by bfactor pal rainbow
... OK, you can see whole range of colors ...
color by bfactor pal ^{rainbow
... now it's all blue!}

I thought I tested this before but maybe the fix for value,color pairs broke it.

Tested in UCSF ChimeraX version: 0.91 (2019-07-02)

[Elaine Meng]

The second command that doesn't work correctly is "hat" symbol before "rainbow" ... I can't figure out how to escape the hat correctly for wikiformatting, which made rainbow into a superscript. The "hat" symbol is what we decided should indicate reversing the colors in a palette, and it worked at some point but is apparently broken now.

[Elaine Meng]

Update: reverse palettes work for
(A) sequential coloring
(B) color-by-value if "range" option is used

They do not work for color-by-value if the range option is omitted.

For example, commands:

open 2gbp
surface
color by bfactor #1 pal rainbow
color by bfactor #1 pal rainbow range 2,63.9

... the two color cmds above both work and are identical because 2,63.9 is the full range (default)

color by bfactor #1 pal <hat-symbol>rainbow range 2,63.9
color by bfactor #1 pal <hat-symbol>rainbow

... only the last one does not work

[Conrad Huang]

Fixed in 1d2b134e0.

When reversing colormaps, the "values specified by user" attribute was not being preserved.