projects/lcsim/trunk/detector-framework/src/main/java/org/lcsim/detector/tracker/silicon

--- projects/lcsim/trunk/detector-framework/src/main/java/org/lcsim/detector/tracker/silicon/HpsSiSensor.java	2014-10-13 07:47:02 UTC (rev 3361)
+++ projects/lcsim/trunk/detector-framework/src/main/java/org/lcsim/detector/tracker/silicon/HpsSiSensor.java	2014-10-14 06:39:06 UTC (rev 3362)
@@ -66,6 +66,17 @@

             IIdentifier id)
     {
 		super(sensorid, name, parent, support, id);

+   
+		// Set the default sensor orientation using the layer number. For sensors
+		// belonging to the top volume, odd (even) layers are axial (stereo).  
+		// For sensors belonging to the bottom, even (odd) layers are axial (stereo). 
+		if(this.isTopLayer() && this.getLayerNumber()%2 == 1){
+		    this.setAxial(true);
+		} else if(this.isBottomLayer() && this.getLayerNumber()%2 == 0){
+		    this.setAxial(true);
+		} else { 
+		    this.setStereo(true);
+		}

     }
 	
 	/**