The default fill color for a TF2 is color 19 (gray).
When drawing with the option "surf2", the current algorithm paints
a given contour level N with Color number N + Current FillColor.
You can set the fill color to 0 to get a one to one correspondance
between contour number and color number.
I have added the corresponding line in your example below
Rene Brun
Marc Mueller wrote:
>
> Hi,
> I'd like to set my own colors in a contour plot. This small
> program does it,but the contour colors are not in the order
> I defined it. Does anybody know how the order of contour colors
> can be set?
>
> Thanks in advance,
> Marc Mueller
>
> mmueller@wiwi.uni-bielefeld.de
>
> {
> gROOT->Reset();
> int colNum=32;
> int colPoint=51;
>
> colorList=gROOT->GetListOfColors();
> while(colorList.LastIndex()>0)
> colorList.RemoveLast();
>
> int mypalette[colNum];
> for ( int i=0; i<colNum; i++)
> {
> TColor(i+colPoint,1-(i/(colNum*1.0)),1-(i/(colNum*1.0)),
> (i/(colNum*1.0))," ");
> if((i+colPoint)<100) {
> colorList.RemoveLast(); //TColor *light
> colorList.RemoveLast(); //TColor *dark
> }
> mypalette[i]=i+colPoint;
> }
> c1 = new TCanvas("prtname","Surface Draw",200,10,700,500);
> gStyle->SetPalette(colNum,mypalette);
>
> pad1 = new TPad("pad1","Title",0.02,0.02,0.98,0.98,10);
> pad1->Draw();
> TF2 *f2 = new TF2("f2","(x^2) + (y^2) - (x^3) -9*x*(y^4)",-2,1,-3,3);
> f2->SetContour(colNum);
f2->SetFillColor(0); // <========new line
> pad1->cd();
> pad1->SetPhi(-70);
> pad1->SetTheta(25);
> pad1->SetLogz();
> f2->Draw("surf2");
> }
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