updates on TOF code to add and use new calibration object

[u/mrichter/AliRoot.git] / TOF / AliTOFRunParams.cxx

diff --git a/TOF/AliTOFRunParams.cxx b/TOF/AliTOFRunParams.cxx
new file mode 100644 (file)
index 0000000..1c8c1c5
--- /dev/null
+++ b/TOF/AliTOFRunParams.cxx
@@ -0,0 +1,224 @@
+/**************************************************************************
+ * 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.                  *
+ **************************************************************************/
+
+// *
+// *
+// *
+// * this class defines the TOF object to be stored
+// * in OCDB on a run-by-run basis in order to have the measurement
+// * of the time evolution of T0 and of TOF resolution including
+// * average T0 uncertainty
+// *
+// *
+// *
+
+#include "AliTOFRunParams.h"
+
+ClassImp(AliTOFRunParams)
+
+//_________________________________________________________
+
+AliTOFRunParams::AliTOFRunParams() :
+  TObject(),
+  fNPoints(0),
+  fTimestamp(NULL),
+  fT0(NULL),
+  fTOFResolution(NULL),
+  fT0Spread(NULL)
+{
+  /*
+   * default constructor
+   */
+}
+
+//_________________________________________________________
+
+AliTOFRunParams::AliTOFRunParams(Int_t nPoints) :
+  TObject(),
+  fNPoints(nPoints),
+  fTimestamp(new UInt_t[nPoints]),
+  fT0(new Float_t[nPoints]),
+  fTOFResolution(new Float_t[nPoints]),
+  fT0Spread(new Float_t[nPoints])
+{
+  /*
+   * standard constructor
+   */
+}
+
+//_________________________________________________________
+
+AliTOFRunParams::~AliTOFRunParams()
+{
+  /*
+   * default destructor
+   */
+
+  if (fTimestamp) delete [] fTimestamp;
+  if (fT0) delete [] fT0;
+  if (fTOFResolution) delete [] fTOFResolution;
+  if (fT0Spread) delete [] fT0Spread;
+}
+
+//_________________________________________________________
+
+AliTOFRunParams::AliTOFRunParams(const AliTOFRunParams &source) :
+  TObject(source),
+  fNPoints(source.fNPoints),
+  fTimestamp(new UInt_t[source.fNPoints]),
+  fT0(new Float_t[source.fNPoints]),
+  fTOFResolution(new Float_t[source.fNPoints]),
+  fT0Spread(new Float_t[source.fNPoints])
+{
+  /*
+   * copy constructor
+   */
+
+  for (Int_t i = 0; i < fNPoints; i++) {
+    fTimestamp[i] = source.fTimestamp[i];
+    fT0[i] = source.fT0[i];
+    fTOFResolution[i] = source.fTOFResolution[i];
+    fT0Spread[i] = source.fT0Spread[i];
+  }
+  
+}
+
+//_________________________________________________________
+
+AliTOFRunParams &
+AliTOFRunParams::operator=(const AliTOFRunParams &source)
+{
+  /*
+   * operator=
+   */
+
+  if (this == &source) return *this;
+  TObject::operator=(source);
+  
+  if (fNPoints != source.fNPoints) {
+    if (fTimestamp) delete [] fTimestamp;
+    if (fT0) delete [] fT0;
+    if (fTOFResolution) delete [] fTOFResolution;
+    if (fT0Spread) delete [] fT0Spread;
+    fNPoints = source.fNPoints;
+    fTimestamp = new UInt_t[source.fNPoints];
+    fT0 = new Float_t[source.fNPoints];
+    fTOFResolution = new Float_t[source.fNPoints];
+    fT0Spread = new Float_t[source.fNPoints];
+  }
+
+  for (Int_t i = 0; i < fNPoints; i++) {
+    fTimestamp[i] = source.fTimestamp[i];
+    fT0[i] = source.fT0[i];
+    fTOFResolution[i] = source.fTOFResolution[i];
+    fT0Spread[i] = source.fT0Spread[i];
+  }
+
+  return *this;
+}
+
+//_________________________________________________________
+
+Float_t
+AliTOFRunParams::EvalT0(UInt_t timestamp)
+{
+  /*
+   * eval T0
+   */
+
+  /* critical cases:
+     1. no measurement -> 0.
+     2. single measurement -> single value
+     3. timestamp before first measurement -> first value
+     4. timestamp after last measurement -> last value
+  */
+  if (fNPoints <= 0 || !fT0 || !fTimestamp) return 0.;
+  if (fNPoints == 1) return fT0[0];
+  if (timestamp <= fTimestamp[0]) return fT0[0];
+  if (timestamp >= fTimestamp[fNPoints - 1]) return fT0[fNPoints - 1];
+
+  /* interpolate value */
+  Int_t ipoint;
+  for (ipoint = 0; ipoint < fNPoints - 1; ipoint++)
+    if (timestamp >= fTimestamp[ipoint] && timestamp < fTimestamp[ipoint + 1])
+      break;
+  Float_t coeff = (fT0[ipoint + 1] - fT0[ipoint]) / (Float_t)(fTimestamp[ipoint + 1] - fTimestamp[ipoint]);
+  Float_t t0 = fT0[ipoint] + coeff * (timestamp - fTimestamp[ipoint]);
+  
+  return t0;
+}
+
+//_________________________________________________________
+
+Float_t
+AliTOFRunParams::EvalTOFResolution(UInt_t timestamp)
+{
+  /*
+   * eval TOF resolution
+   */
+
+  /* critical cases:
+     1. no measurement -> 0.
+     2. single measurement -> single value
+     3. timestamp before first measurement -> first value
+     4. timestamp after last measurement -> last value
+  */
+  if (fNPoints <= 0 || !fTOFResolution || !fTimestamp) return 0.;
+  if (fNPoints == 1) return fTOFResolution[0];
+  if (timestamp <= fTimestamp[0]) return fTOFResolution[0];
+  if (timestamp >= fTimestamp[fNPoints - 1]) return fTOFResolution[fNPoints - 1];
+
+  /* interpolate value */
+  Int_t ipoint;
+  for (ipoint = 0; ipoint < fNPoints - 1; ipoint++)
+    if (timestamp >= fTimestamp[ipoint] && timestamp < fTimestamp[ipoint + 1])
+      break;
+  Float_t coeff = (fTOFResolution[ipoint + 1] - fTOFResolution[ipoint]) / (Float_t)(fTimestamp[ipoint + 1] - fTimestamp[ipoint]);
+  Float_t reso = fTOFResolution[ipoint] + coeff * (timestamp - fTimestamp[ipoint]);
+  
+  return reso;
+}
+
+//_________________________________________________________
+
+Float_t
+AliTOFRunParams::EvalT0Spread(UInt_t timestamp)
+{
+  /*
+   * eval T0 spread
+   */
+
+  /* critical cases:
+     1. no measurement -> 0.
+     2. single measurement -> single value
+     3. timestamp before first measurement -> first value
+     4. timestamp after last measurement -> last value
+  */
+  if (fNPoints <= 0 || !fT0Spread || !fTimestamp) return 0.;
+  if (fNPoints == 1) return fT0Spread[0];
+  if (timestamp <= fTimestamp[0]) return fT0Spread[0];
+  if (timestamp >= fTimestamp[fNPoints - 1]) return fT0Spread[fNPoints - 1];
+
+  /* interpolate value */
+  Int_t ipoint;
+  for (ipoint = 0; ipoint < fNPoints - 1; ipoint++)
+    if (timestamp >= fTimestamp[ipoint] && timestamp < fTimestamp[ipoint + 1])
+      break;
+  Float_t coeff = (fT0Spread[ipoint + 1] - fT0Spread[ipoint]) / (Float_t)(fTimestamp[ipoint + 1] - fTimestamp[ipoint]);
+  Float_t spread = fT0Spread[ipoint] + coeff * (timestamp - fTimestamp[ipoint]);
+  
+  return spread;
+}
+