From 6872c613153eed97f7c282c832a716373906c84f Mon Sep 17 00:00:00 2001
From: morsch <morsch@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Fri, 27 Oct 2000 08:13:02 +0000
Subject: [PATCH] Lego generator for phi-z binning.

---
 STEER/AliLegoGeneratorPhiZ.cxx | 79 ++++++++++++++++++++++++++++++++++
 STEER/AliLegoGeneratorPhiZ.h   | 33 ++++++++++++++
 2 files changed, 112 insertions(+)
 create mode 100644 STEER/AliLegoGeneratorPhiZ.cxx
 create mode 100644 STEER/AliLegoGeneratorPhiZ.h

diff --git a/STEER/AliLegoGeneratorPhiZ.cxx b/STEER/AliLegoGeneratorPhiZ.cxx
new file mode 100644
index 00000000000..88556e1480c
--- /dev/null
+++ b/STEER/AliLegoGeneratorPhiZ.cxx
@@ -0,0 +1,79 @@
+/**************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ *                                                                        *
+ * Author: The ALICE Off-line Project.                                    *
+ * Contributors are mentioned in the code where appropriate.              *
+ *                                                                        *
+ * Permission to use, copy, modify and distribute this software and its   *
+ * documentation strictly for non-commercial purposes is hereby granted   *
+ * without fee, provided that the above copyright notice appears in all   *
+ * copies and that both the copyright notice and this permission notice   *
+ * appear in the supporting documentation. The authors make no claims     *
+ * about the suitability of this software for any purpose. It is          *
+ * provided "as is" without express or implied warranty.                  *
+ **************************************************************************/
+
+/*
+$Log$
+*/
+
+#include "AliLegoGeneratorPhiZ.h"
+#include "AliRun.h"
+
+ClassImp(AliLegoGeneratorPhiZ)
+
+
+//___________________________________________
+void AliLegoGeneratorPhiZ::Generate()
+{
+// Create a geantino with kinematics corresponding to the current bins
+// Here: Coor1 =  Z 
+//       Coor2 =  phi.
+   
+  //
+  // Rootinos are 0
+   const Int_t kMpart = 0;
+   Float_t orig[3], pmom[3];
+   Float_t t, cosp, sinp;
+   if (fCoor1Bin==-1) fCoor1Bin=fNCoor1;
+   // Prepare for next step
+   if(fCoor1Bin>=fNCoor1-1)
+     if(fCoor2Bin>=fNCoor2-1) {
+       Warning("Generate","End of Lego Generation");
+       return;
+     } else { 
+       fCoor2Bin++;
+       printf("Generating rays in phi bin:%d\n",fCoor2Bin);
+       fCoor1Bin=0;
+     } else fCoor1Bin++;
+
+   fCurCoor1 = (fCoor1Min+(fCoor1Bin+0.5)*(fCoor1Max-fCoor1Min)/fNCoor1);
+   fCurCoor2 = (fCoor2Min+(fCoor2Bin+0.5)*(fCoor2Max-fCoor2Min)/fNCoor2);
+
+   Float_t phi   = fCurCoor1*TMath::Pi()/180.;
+   
+   cosp      = TMath::Cos(phi);
+   sinp      = TMath::Sin(phi);
+   
+   pmom[0] = cosp;
+   pmom[1] = sinp;
+   pmom[2] = 0.;
+   
+   // --- Where to start
+   orig[0] = orig[1] = orig[2] = 0;
+   orig[2] = fCurCoor2;
+   
+   Float_t dalicz = 3000;
+   if (fRadMin > 0) {
+       t = PropagateCylinder(orig,pmom,fRadMin,dalicz);
+       orig[0] = pmom[0]*t;
+       orig[1] = pmom[1]*t;
+       orig[2] = pmom[2]*t;
+       if (TMath::Abs(orig[2]) > fZMax) return;
+   }
+   
+   Float_t polar[3]={0.,0.,0.};
+   Int_t ntr;
+   gAlice->SetTrack(1, 0, kMpart, pmom, orig, polar, 0, "LEGO ray", ntr);
+   
+}
diff --git a/STEER/AliLegoGeneratorPhiZ.h b/STEER/AliLegoGeneratorPhiZ.h
new file mode 100644
index 00000000000..89448382dc9
--- /dev/null
+++ b/STEER/AliLegoGeneratorPhiZ.h
@@ -0,0 +1,33 @@
+#ifndef ALILEGOGENERATORPHIZ_H
+#define ALILEGOGENERATORPHIZ_H
+/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * See cxx source for full Copyright notice                               */
+
+/* $Id$ */
+
+///////////////////////////////////////////////////////////////////////////////
+//                                                                           //
+//                                                                           //
+//    Utility class to compute and draw Radiation Length Map                 //
+//                                                                           //
+//                                                                           //
+///////////////////////////////////////////////////////////////////////////////
+
+#include "AliLegoGenerator.h"
+
+class AliLegoGeneratorPhiZ : public AliLegoGenerator
+{
+
+ public:
+    virtual void    Generate();
+    ClassDef(AliLegoGeneratorPhiZ,1) //Lego GeneratorPhiZ
+};
+#endif
+
+
+
+
+
+
+
+
-- 
2.31.1