Re: retrieve points from a graphical cut

Hi Rene,

        I do

gcut->Print()

x[0]=1084.32, y[0]=94.7369
x[1]=1363.86, y[1]=91.1887
x[2]=1084.32, y[2]=94.7369

then I try

Double_t x[2] = (TCutG*)gcut->GetObjectX() Double_t x[2] = (TCutG*)gcut->GetX()

and no luck. What other variants can I try? Ricardo

On Sat, 2005-08-20 at 08:32 +0200, Rene Brun wrote:
> Hi Ricardo,
>
> A TCutG is a TGraph. Use the TGraph Get functions to access
> the points in it.
>
> Rene Brun
>
> On Fri, 19 Aug
> 2005, Ricardo Yanez wrote:
>
> > Hi,
> > I need to locate two points to set the fitting limits to a gamma peak.
> > How can I locate two points graphically?
> >
> > My solution thus far has been to make a graphical cut,
> >
> > TCutG *gcut = (TCutG*)gPad->WaitPrimitive("CUTG","CutG");
> >
> > But, how do I retrieve the points I click?
> >
> > Thanks,
> > Ricardo
> >
> >

-- 
Ricardo Yanez
PO Box 156
Penaflor CHILE
phone: +56 2 8140550
mobile: +56 9 5112241
email: Ricardo.Yanez_at_correo.calel.cl
jabber: ricardo.yanez_at_jabber.org
web: http://www.calel.cl/
PGP public key: 5B625B93






application/pgp-signature attachment: This is a digitally signed message part