Hamish wrote:
I've got a 3D raster with a very skewed distribution.
For viewing the slices (r3.to.rast) I'd like to use a
single set of color rules for all of the z-levels.So I'd like to run the ever-amazing 'r.colors -e' to
equalize over the full distribution, but how to do
that for all the z-level slices at once?ideas:
-r.region translate them and then patch them all
together on the same horizontal plane, calc the color
rules, then apply the mosaic's set of rules to all
the original slices.
method to north-south stack a series of raster maps now added
as a new grass6 addon script:
http://grass.osgeo.org/wiki/GRASS_AddOns#r.stack
r.stack is a shell script used to patch all the raster maps in a time series (or burst 3D raster) together into a vertical stack, to aid mutli-map analyses in modules where group input is not yet available. Use in a lat/lon location may be problematic.
...
once I have that I'd like to write an addon module
which converts a grass color table to a VTK .xml
color table, so they can be used there too,
now added as a new grass6 addon script:
http://grass.osgeo.org/wiki/GRASS_AddOns#r.colors.out_vtk
r.colors.out_vtk is a shell script used to export the color table associated with a raster map layer to a VTK XML file.
props to Soeren for help with VTK.
and also figure out how to auto-set NVIZ G3D isosurface
colors from them.
still TODO. similarly, how to take GRASS_RGB column setting for
NVIZ vector points (once fixed 
and surfaces.
Hamish