some comments are added

diff --git a/PMD/AliPMDClusterFinder.cxx b/PMD/AliPMDClusterFinder.cxx
index c95b40c6dc837299fc9c5b57f32067ec44257e9b..724ac2b0c9b49eb5f000f258714d773f771979cc 100644 (file)
--- a/PMD/AliPMDClusterFinder.cxx
+++ b/PMD/AliPMDClusterFinder.cxx
@@ -250,6 +250,7 @@ void AliPMDClusterFinder::Digits2RecPoints(Int_t ievt, AliRawReader *rawReader)
       //   << " row = " << row << " col = " << col
       //   << " sig = " << sig << endl;
 
+      // Transform all the (0,0) coordinates to the geant frame
       if(smn < 6)
        {
          irownew1 = 95 - row;
@@ -271,6 +272,12 @@ void AliPMDClusterFinder::Digits2RecPoints(Int_t ievt, AliRawReader *rawReader)
          icolnew1 = 95 - col;
        }
 
+      // for smn < 12          : row = 96, column = 48
+      // for smn>= 12 and < 24 : row = 48, column = 96
+      // In order to make it uniform dimension, smn < 12 are inverted
+      // i.i., row becomes column and column becomes row
+      // for others it remains same
+      // This is further inverted back while calculating eta and phi
       if(smn < 12)
        {
          // SupeModule 1 and 2 : Rows are inverted to columns and vice versa