Hi David, Thanks for the reply. I got the desired effect with the "Use Discrete Colors" method.
I'll look forward to the later release with the discrete maps. Cheers, Joe Regards, Joseph David Borġ http://www.jdborg.com On 7 November 2012 00:46, David Thompson <david.thomp...@kitware.com> wrote: > Hi Joe, > > > By default, all the colour maps in ParaView are continuous between > points. I'd like to have only one colour in between points I set in the > XML map, is this possible? > > In the current release of ParaView, you can click on the "Edit color map" > button in the toolbar and turn on "Use Discrete Colors" in the color > editor. By changing the number of colors with the neighboring slider, > uniform ranges of scalar values will be assigned a single color. > > In an upcoming release, discrete color maps will be available. Discrete > colormaps do not interpolate colors; instead they are looked up in a table, > so a single large difference in values will not force any small variations > to be lumped into a single color band. However, this requires your scalar > field to take on a small number of distinct values (32 or fewer); colors > are assigned to a single value, not a range. > > To map non-uniform ranges of values to a single color each, you really > should create a derived, integer-valued variable and use it for coloring -- > regardless of whether you use continuous colormaps in the current release > or plan to use categorical color maps later. The calculator filter's floor, > ceil, and round functions might be worth a try in creating the derived > field; if there's not a simple expression to convert each range of interest > to an integer, the Python calculator will let you apply a tabular function. > > Finally, it *may* also be possible to achieve what you desire with a > custom XML color map by placing control points with different colors very > close to each other to create a discontinuous color map. This would be > difficult to adjust in the color editor should the control points need to > be repositioned, but might be the easiest thing to do if the bands are > fixed values or fixed fractions of the total range. > > David > > >
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