Hello rooters,
In the doc for the class TAttFill, I read:
*-* Line attributes are taking from the argument list
[...]
*-* width : expressed in pixel units
What is this 'pixel' ?
If I give the same value in different condition, I obtain very different
visual output (and certainly not the same number of screen pixels).
How is the computation of the actual width done ?
Exemple:
<<<<
//File test.C
{
TCanvas cnv1("toto","LineWidth size",2);
TH1D *h1=new TH1D("h1","h1",100,-10,10);
h1->FillRandom("gaus");
TF1 *f1=new TF1("f1","gaus");
f1->SetLineWidth(5);
h1->Fit("f1");
TCanvas cnv2("toto2","LineWidth size2",2);
cnv2->Divide(1,2);
toto2_1->cd();
h1->Draw();
toto2_2->cd();
h1->Draw();
}
>>>>
On my system (ix86 Linux with ROOT v3.00.02) the line width is very
different between the 2 pads, and if it could be near 5 pixels on cnv1
it's at the most 2 or 3 on cnv2.
I understand that a scaling has to be done, but I would like to know the
rules that are applied to do it...
Yannick
PS1: On my system, the previous test break CINT at second invocation
(did I made an obvious mistake?):
* Version 3.00/02 18 January 2001 *
root [0] .x test.C
(fits vals) OK
root [1] .x test.C
Warning in <TH1::Build>: Replacing existing histogram: h1
(fits val)
*** Break *** segmentation violation
PS2: The HTML presentation of the class is very useful and clever,
nicely presented, full of coments and hyperlinks, but why cant it be the
same for the .h files ? If I have the bad luck to seek for informations
related to an inline method, I'm send to an ugly looking file without
any fontification, neither comments or help of any kind. Is there a good
reason for it ?
This archive was generated by hypermail 2b29 : Tue Jan 01 2002 - 17:50:35 MET