Re: Semi-Transparent polygone

Hi Stanislav,

See this example using fill styles with patterns.

Rene Brun

void trans() {

    TH1F *h1 = new TH1F("h1","test1",100,-2,2);     TF1 f1("f1","gaus",-2,2);
    f1.SetParameters(1,-0.5,1);
    h1->FillRandom("f1",10000);
    TH1F *h2 = new TH1F("h2","test2",100,-2,2);     f1.SetParameters(1,0.5,0.3);

    h2->FillRandom("f1",3200);
    h1->SetFillStyle(3001);
    h1->SetFillColor(kRed);
    h1->Draw();
    h2->SetFillStyle(3010); //try styles between 3001 and 3025
    h2->SetFillColor(kBlue);
    h2->Draw("same");

On Fri, 8 Jul
2005,
Stanislav Nesterov wrote:

> Hello,
> I would like to know is there any way to draw semi-transparent filled area in
> ROOT? At least in version 4.x?
>
> AFAIK, the only one object (TPad) in ROOT can be blended with underlaying
> layers. All other graphical objects ignore transparency fill style in sense
> of blending colours. Maybe today this is not the case?
>
> --
> Best regards,
> Stanislav.
>
Received on Fri Jul 08 2005 - 22:27:37 MEST