Changeset 1192 for trunk/source/processes/electromagnetic/lowenergy/src/G4LinLogLogInterpolation.cc

Timestamp:

Nov 19, 2009, 2:53:25 PM (15 years ago)

Author:

garnier

Message:

update par rapport a CVS

File:

• trunk/source/processes/electromagnetic/lowenergy/src/G4LinLogLogInterpolation.cc (modified) (2 diffs)

trunk/source/processes/electromagnetic/lowenergy/src/G4LinLogLogInterpolation.cc

@@ -53 +53 @@
                                           const G4DataVector& data) const
 {
+  //G4cout << "G4LinLogLogInterpolation is performed (2 arguments) " << G4endl;
   G4int nBins = data.size() - 1;
   G4double value = 0.;
@@ -79 +80 @@
   return value;
 }
+
+G4double G4LinLogLogInterpolation::Calculate(G4double x, G4int bin, 
+                                          const G4DataVector& points,
+                                          const G4DataVector& data,
+                                          const G4DataVector& log_points, 
+                                          const G4DataVector& log_data) const
+{
+  //G4cout << "G4LinLogLogInterpolation is performed(4 arguments)  " << G4endl;
+  G4int nBins = data.size() - 1;
+  G4double value = 0.;
+  G4double log_x = std::log10(x);
+  if (x < points[0])
+    {
+      value = 0.;
+    }
+  else if (bin < nBins)
+    {
+      G4double e1 = points[bin];
+      G4double e2 = points[bin+1];
+      G4double d1 = data[bin];
+      G4double d2 = data[bin+1];      
+      G4double log_e1 = log_points[bin];
+      G4double log_e2 = log_points[bin+1];
+      G4double log_d1 = log_data[bin];
+      G4double log_d2 = log_data[bin+1];
+      //G4cout << "x = " << x << " , log_x = " << log_x << " , bin = " << bin << G4endl;
+      //G4cout << "e1 = " << e1 << " , d1 = " << d1 << G4endl;
+      //G4cout << "e2 = " << e2 << " , d2 = " << d2 << G4endl;
+      //G4cout << "log_e1 = " << log_e1 << " , log_d1 = " << log_d1 << G4endl;
+      //G4cout << "log_e2 = " << log_e2 << " , log_d2 = " << log_d2 <<G4endl;
+      if (d1 > 0.0 && d2 > 0.0)
+       {
+         // Values e1, e2, d1 and d2 are the log values of the corresponding
+         // original energy and data values. Simple linear interpolation performed
+         // on loagarithmic data should be equivalent to log-log interpolation
+         value = log_d1 + (log_d2 - log_d1)*(log_x - log_e1)/(log_e2 - log_e1);
+
+         //G4cout << "Case of normal log-log interpolation" << G4endl;
+         //G4cout << "Temp log interpolated value: log_value = " << value << G4endl;
+
+         // Delogarithmize to obtain interpolated value
+         value = std::pow(10.,value);
+
+         //G4cout << "Final Interpolated value: " << value << G4endl << G4endl;
+       }
+     else
+       {
+        // Case of semi log-log interpolation
+        //G4cout << "G4LinLogLogInterpolation - Case of SemiLogInterpolation" << G4endl;
+        if (e1 == 0.0) e1 = 1e-300;
+        if (e2 == 0.0) e2 = 1e-300;
+        value = d1 + (d2 - d1)*(log_x - log_e1)/(log_e2 - log_e1);
+        //G4cout << "LinLogInterpolation: Final Interpolated value: " << value << G4endl << G4endl;
+       }
+    }
+  else
+    {
+      value = data[nBins];
+    }
+  return value;
+}