https://github.com/root-project/root
Tip revision: 5b840de0da705730ef07e602408cec9c6ddca1d3 authored by Unknown Author on 06 May 2002, 16:15:08 UTC
This commit was manufactured by cvs2svn to create tag 'v3-03-03'.
This commit was manufactured by cvs2svn to create tag 'v3-03-03'.
Tip revision: 5b840de
io.C
{
gROOT->Reset();
TCanvas *c1 = gROOT->FindObject("c1"); if (c1) c1->Delete();
c1 = new TCanvas("c1","I/O strategies",20,10,750,930);
c1->SetBorderSize(0);
c1->Range(0,0,20.5,26);
TPaveText title(2,22,18,25.5);
title.SetFillColor(10);
title.AddText(" ");
TText *ser = title.AddText("We need a flexible I/O mechanism");
ser.SetTextSize(0.04);
ser.SetTextAlign(21);
TText *t1 = title.AddText("From the same Object Model, one must be able to select");
t1.SetTextSize(0.022);
t1.SetTextAlign(11);
t1.SetTextFont(72);
TText *t2 = title.AddText("different storage models (performance)");
t2.SetTextSize(0.022);
t2.SetTextAlign(11);
t2.SetTextFont(72);
title.Draw();
TPaveText event(1,16,20,21);
event.SetTextAlign(12);
event.SetFillColor(10);
event.SetTextFont(82);
event.SetTextSize(0.015);
event.ReadFile("event.h");
event.Draw();
TPaveText m1(4,13,19,15);
m1.SetTextSize(0.024);
m1.SetTextFont(72);
m1.SetFillColor(10);
TText *t1 = m1.AddText("One single container (old raw data model)");
t1.SetTextFont(62);
t1.SetTextAlign(22);
m1.AddText("All event components are serialized in the same buffer");
m1.Draw();
TPaveText m2(4,8,19,12);
m2.SetTextAlign(12);
m2.SetTextFont(72);
m2.SetTextSize(0.025);
m2.SetFillColor(10);
TText *tm1 = m2.AddText("A few containers: (DST analysis)");
tm1.SetTextFont(62);
tm1.SetTextAlign(22);
tm1.SetTextSize(0.03);
m2.AddText("- Header");
m2.AddText("- Tracks");
m2.AddText("- Calorimeters");
m2.AddText("- Histograms");
m2.Draw();
TPaveText m3(4,1,19,7);
m3.SetTextAlign(12);
m3.SetTextFont(72);
m3.SetTextSize(0.025);
m3.SetFillColor(10);
TText *tm3 = m3.AddText("Many containers (like PAW ntuples):");
tm3.SetTextFont(62);
tm3.SetTextAlign(22);
tm3.SetTextSize(0.03);
m3.AddText("- Each Data Member has its container");
m3.AddText("- Special classes (ClonesArray) for large collections");
m3.AddText("- One event-histogram per container");
m3.AddText("- Good for Physic Analysis stage");
m3.Draw();
TText arrow;
arrow.SetTextFont(142);
arrow.SetTextSize(0.07);
arrow.DrawText(1.5,13.5,"~\375");
arrow.DrawText(1.5,10,"~\375");
arrow.DrawText(1.5, 5,"~\375");
c1.Print("io.ps");
}