ROOT_528-00b_version: tutorials/gl/glh3c.C Source File

00001 // Display a 3D histogram using GL (box option).
00002 //Author: Timur Pocheptsov
00003 void glh3c()
00004 {
00005   gStyle->SetCanvasPreferGL(kTRUE);
00006   
00007 
00008   TGLTH3Composition * comp = new TGLTH3Composition;
00009   TH3F * h1 = new TH3F("h1", "h1", 10, -1., 1., 10, -1., 1., 10, -1., 1.);
00010   h1->FillRandom("gaus");
00011   h1->SetFillColor(kRed);
00012   TH3F * h2 = new TH3F("h2", "h2", 10, -1., 1., 10, -1., 1., 10, -1., 1.);
00013   h2->FillRandom("landau");
00014   h2->SetFillColor(kGreen);
00015   TH3F * h3 = new TH3F("h3", "h3", 10, -1., 1., 10, -1., 1., 10, -1., 1.);
00016   h3->FillRandom("gaus");
00017   h3->SetFillColor(kBlue);
00018   
00019   comp->AddTH3(h1);
00020   comp->AddTH3(h2, TGLTH3Composition::kSphere);
00021   comp->AddTH3(h3);
00022 
00023   comp->Draw();
00024 
00025   TPaveLabel *title = new TPaveLabel(0.04, 0.86, 0.96, 0.98,
00026                                      "TH3 composition.");
00027   title->SetFillColor(32);
00028   title->Draw();
00029 }