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Commit in hps-java/src/main/java/org/lcsim/hps/recon/tracking on MAIN
TrackerReconDriver.java+18-91.5 -> 1.6
replace hard-coded bfield with call to Detector

hps-java/src/main/java/org/lcsim/hps/recon/tracking
TrackerReconDriver.java 1.5 -> 1.6
diff -u -r1.5 -r1.6
--- TrackerReconDriver.java	19 Jan 2012 23:56:54 -0000	1.5
+++ TrackerReconDriver.java	23 Jan 2012 23:11:26 -0000	1.6
@@ -1,5 +1,7 @@
 package org.lcsim.hps.recon.tracking;
 
+import hep.physics.vec.BasicHep3Vector;
+
 import java.util.ArrayList;
 import java.util.List;
 
@@ -21,13 +23,13 @@
  * It is intended to work with the {@link TrackerDigiDriver} digitization Driver.
  * 
  * @author jeremym
- * @version $Id: TrackerReconDriver.java,v 1.5 2012/01/19 23:56:54 jeremy Exp $
+ * @version $Id: TrackerReconDriver.java,v 1.6 2012/01/23 23:11:26 jeremy Exp $
  */
 public final class TrackerReconDriver extends Driver 
 {
 	// Debug flag
 	private final static boolean DEBUG = true;
-	
+		
 	// Tracks found across all events.
 	int ntracks = 0;
 	
@@ -37,7 +39,7 @@
 	// Cache detector object.
 	Detector detector = null;
 	
-    // FIXME Hard-coded B-field value.  Get this from the Detector?
+    // Default B-field value.
     private double bfield = 0.5;
     
     // Name of the SVT subdetector.
@@ -101,10 +103,10 @@
 	}
 	
     // FIXME This set method should go away eventually.  Field should be read from Detector in detectorChanged method.
-    public void setBField(double bfield)
-    {
-    	this.bfield = bfield;
-    }
+    //public void setBField(double bfield)
+    //{
+    //	this.bfield = bfield;
+    //}
     
     public void setInputHitCollectionName(String inputHitCollectionName)
     {
@@ -149,10 +151,17 @@
      * This is used to setup the Drivers after XML config.
      */
     public void detectorChanged(Detector detector)
-    {
+    {    	
+    	// Cache Detector object.
     	this.detector = detector;
-    	//System.out.println("detector bfield @ 0,0,0 = " + detector.getFieldMap().getField(new BasicHep3Vector(0,0,0)));
+    	
+    	// Get B-field Y component with flipped sign.
+    	// FIXME Is this always right?
+    	this.bfield = -(detector.getFieldMap().getField(new BasicHep3Vector(0,0,0))).y();
+    	System.out.println("Set B-field to " + this.bfield);
+    	
         initialize();
+        
         super.detectorChanged(detector);        
     }
         
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