Maciej Sieczka wrote:
> > What do you guys think of a flag in r.colors to apply an _inverted_ color
> > scale?
>
> Sounds really usefull to me.
Sounds really trivial to implement, too.
"struct Colors" already has an "invert" field, which can be inverted
with G_invert_colors().
AFAICT, you just need e.g.:
flag.n = G_define_flag();
flag.n->key = 'n';
flag.n->description = _("Invert colors");
...
if (flag.n->answer)
{
G_invert_colors(&colors);
colors = colors_tmp;
}
The only issue is whether the inversion should come before or after
logarithmic scaling (I think that it matters, although I haven't
actually checked).
As more transforms are added, it's looking more important to replace
the various flags with an option, e.g. trans=log,eq,inv.
NOTE: this will add another situation where the GUI's assumption that
opt->multiple=YES implies a set (rather than a list) will fail.
--
Glynn Clements <[EMAIL PROTECTED]>
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