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Author: [log in to unmask]
Date: Wed Feb 11 11:51:12 2015
New Revision: 2107

Log:
Adding HPS specific cluster property calculators.  (Not used in reconstruction right now.)

Added:
    java/trunk/ecal-recon/src/main/java/org/hps/recon/ecal/cluster/HardwareClusterPropertyCalculator.java
    java/trunk/ecal-recon/src/main/java/org/hps/recon/ecal/cluster/ReconClusterPropertyCalculator.java

Added: java/trunk/ecal-recon/src/main/java/org/hps/recon/ecal/cluster/HardwareClusterPropertyCalculator.java
 =============================================================================
--- java/trunk/ecal-recon/src/main/java/org/hps/recon/ecal/cluster/HardwareClusterPropertyCalculator.java	(added)
+++ java/trunk/ecal-recon/src/main/java/org/hps/recon/ecal/cluster/HardwareClusterPropertyCalculator.java	Wed Feb 11 11:51:12 2015
@@ -0,0 +1,42 @@
+package org.hps.recon.ecal.cluster;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import org.hps.recon.ecal.cluster.ClusterUtilities.UniqueEnergyComparator;
+import static org.hps.recon.ecal.cluster.ClusterUtilities.isHardwareCluster;
+import org.lcsim.event.CalorimeterHit;
+import org.lcsim.event.Cluster;
+import org.lcsim.event.base.AbstractClusterPropertyCalculator;
+
+/**
+ * Cluster property calculator for hardware clusters.
+ * @author Jeremy McCormick <[log in to unmask]>
+ */
+public class HardwareClusterPropertyCalculator extends AbstractClusterPropertyCalculator {
+
+    @Override
+    public void calculateProperties(List<CalorimeterHit> hits) {        
+        reset();        
+        List<CalorimeterHit> sortedHits = new ArrayList<CalorimeterHit>(hits);
+        Collections.sort(sortedHits, new UniqueEnergyComparator());   
+        CalorimeterHit seedHit = sortedHits.get(0);
+        this.position = new double[] {seedHit.getPosition()[0], seedHit.getPosition()[1], seedHit.getPosition()[2]};
+    }
+
+    @Override
+    public void calculateProperties(Cluster cluster) {        
+        reset();       
+        if (isHardwareCluster(cluster)) {
+            setPositionFromSeedHit(cluster);
+        } else {
+            throw new IllegalArgumentException("The cluster has the wrong type: " + ClusterType.getClusterType(cluster.getType()).toString());
+        }
+    }
+    
+    void setPositionFromSeedHit(Cluster cluster) {
+        CalorimeterHit seedHit = ClusterUtilities.findSeedHit(cluster);
+        this.position = new double[] {seedHit.getPosition()[0], seedHit.getPosition()[1], seedHit.getPosition()[2]};
+    }          
+}

Added: java/trunk/ecal-recon/src/main/java/org/hps/recon/ecal/cluster/ReconClusterPropertyCalculator.java
 =============================================================================
--- java/trunk/ecal-recon/src/main/java/org/hps/recon/ecal/cluster/ReconClusterPropertyCalculator.java	(added)
+++ java/trunk/ecal-recon/src/main/java/org/hps/recon/ecal/cluster/ReconClusterPropertyCalculator.java	Wed Feb 11 11:51:12 2015
@@ -0,0 +1,60 @@
+package org.hps.recon.ecal.cluster;
+
+import hep.physics.vec.Hep3Vector;
+
+import java.util.List;
+
+import org.lcsim.detector.converter.compact.EcalCrystal;
+import org.lcsim.event.CalorimeterHit;
+import org.lcsim.event.Cluster;
+import org.lcsim.event.base.AbstractClusterPropertyCalculator;
+
+class ReconClusterPropertyCalculator extends AbstractClusterPropertyCalculator {
+
+    public void calculateProperties(List<CalorimeterHit> hits) {
+        // This is unsupported because the cluster's energy is required for the position algorithm. 
+        throw new IllegalArgumentException("This method is not supported for recon clustering.");
+    }
+    
+    /**
+     * Calculates the position of each cluster with no correction for particle type, 
+     * as documented in HPS Note 2014-001.
+     * @param cluster The input Cluster.
+     */
+    public void calculateProperties(Cluster cluster) {
+        
+        reset();
+        
+        // Calculate the position of the cluster.
+        calculatePosition(cluster);
+    }
+
+    private void calculatePosition(Cluster cluster) {
+        final double w0 = 3.1;
+        double xCl = 0.0;
+        // calculated cluster y position
+        double yCl = 0.0;
+        double eNumX = 0.0;
+        double eNumY = 0.0;
+        double eDen = 0.0;
+        List<CalorimeterHit> clusterHits = cluster.getCalorimeterHits();
+        for (CalorimeterHit hit : clusterHits) {
+            
+            EcalCrystal crystal = (EcalCrystal) hit.getDetectorElement();
+            Hep3Vector crystalPosition = crystal.getPositionFront();
+            
+            eNumX += Math.max(0.0, (w0 + Math.log(hit.getCorrectedEnergy() / cluster.getEnergy()))) * (crystalPosition.x() / 10.0);
+            eNumY += Math.max(0.0, (w0 + Math.log(hit.getCorrectedEnergy() / cluster.getEnergy()))) * (crystalPosition.y() / 10.0);
+            eDen += Math.max(0.0, (w0 + Math.log(hit.getCorrectedEnergy() / cluster.getEnergy())));
+
+        } // end for iteration through clusterHits
+
+        xCl = eNumX / eDen;
+        yCl = eNumY / eDen;
+
+        position[0] = xCl * 10.0;// mm
+        position[1] = yCl * 10.0;// mm        
+        CalorimeterHit seedHit = clusterHits.get(0);
+        this.position[2] = ((EcalCrystal)seedHit.getDetectorElement()).getPositionFront().z();
+    }    
+}