Hi Thomas,
In CVS, I have added TStyle::SetNumberContours
with a default value of 20.
Thanks for the suggestion.
Rene Brun
On Tue, 26 Nov 2002, Thomas Hadig wrote:
> Hi all,
>
> I was just switching from an older version of ROOT (3.00/06) to the newest
> 3.03/09 and noticed that the color scale on COLZ plots is different: Less
> than the 50 colors of the gSystem->SetPalette(1) default are used.
>
> I found the reason for this change to be the introduction of contour levels.
> My histograms do not have contour levels set, so the default of 20 levels.
>
> I know you can change in the TH* itself, but this is very inconvenient
> for e.g. tree->Draw("...") or TBrowser draw selections as a new histogram
> is created each time.
>
> It would be nice to either have that default number configurable
> (e.g. gSystem->SetDefaultNumberContourLevels()) or to change with
> the number of colors in the color palette, i.e. change the lines
> in THistPainter.cxx void THistPainter::PaintColorLevels(Option_t *)
> from
> // Initialize the levels on the Z axis
> Int_t ncolors = gStyle->GetNumberOfColors();
> Int_t ndiv = fH->GetContour();
> if (ndiv == 0 ) {
> ndiv = 20;
> fH->SetContour(ndiv);
> }
> to
> // Initialize the levels on the Z axis
> Int_t ncolors = gStyle->GetNumberOfColors();
> Int_t ndiv = fH->GetContour();
> if (ndiv == 0 ) {
> ndiv = ncolors;
> if (ndiv <= 0 ) ndiv=20;
> fH->SetContour(ndiv);
> }
>
> Ciao
> Thomas
>
> ----------------------------------------------------------------------------
> Thomas Hadig MS 62, 2575 Sand Hill Road, Menlo Park CA 94025, USA
> hadig@slac.stanford.edu Tel.: +1 650 926 2810
> http://www.slac.stanford.edu/~hadig/
> ----------------------------------------------------------------------------
> In a world without walls and fences, who needs windows and gates ?
> ----------------------------------------------------------------------------
>
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