diff -N CalHitStepPosTest.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ CalHitStepPosTest.java	27 Feb 2012 22:09:23 -0000	1.1
@@ -0,0 +1,65 @@

+package org.lcsim;
+
+import hep.physics.vec.BasicHep3Vector;
+import hep.physics.vec.Hep3Vector;
+import hep.physics.vec.VecOp;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+import java.util.List;
+
+import junit.framework.TestCase;
+
+import org.freehep.record.loop.LoopException;
+import org.lcsim.event.EventHeader;
+import org.lcsim.event.SimCalorimeterHit;
+import org.lcsim.geometry.IDDecoder;
+import org.lcsim.job.EventMarkerDriver;
+import org.lcsim.util.Driver;
+import org.lcsim.util.cache.FileCache;
+import org.lcsim.util.loop.LCSimLoop;
+
+public class CalHitStepPosTest extends TestCase {
+	
+	private static final String fileUrl = "http://www.lcsim.org/test/lcio/muons500_Theta4-176_1-10GeV_SLIC-v2r11p2_geant4-v9r4p2_QGSP_BERT_sidloi3.slcio";
+
+	public void testIt() throws IOException {
+		FileCache cache = new FileCache();
+		cache.setCacheDirectory(new File("."));
+		File file = cache.getCachedFile(new URL(fileUrl));
+		LCSimLoop loop = new LCSimLoop();
+		loop.add(new EventMarkerDriver());
+		loop.add(new CellPosDriver());
+		try {
+			loop.setLCIORecordSource(file);
+		} catch (IOException x) {
+			throw new RuntimeException(x);
+		}
+		try {
+			loop.loop(-1, null);
+		} catch (LoopException x) {
+			throw new RuntimeException(x);
+		} catch (IOException x) {
+			throw new RuntimeException(x);
+		}
+		loop.dispose();
+	}
+
+	static class CellPosDriver extends Driver {
+		public void process(EventHeader event) {
+			List<SimCalorimeterHit> hits = event.get(SimCalorimeterHit.class, "HcalBarrelHits");
+			IDDecoder decoder = event.getMetaData(hits).getIDDecoder();
+			for (SimCalorimeterHit hit : hits) {
+				decoder.setID(hit.getCellID());
+				Hep3Vector cellPos = decoder.getPositionVector();
+				int ncontribs = hit.getMCParticleCount();
+				for (int i = 0; i < ncontribs; i++) {
+					float stepPos[] = hit.getStepPosition(i);
+					Hep3Vector stepVec = new BasicHep3Vector(stepPos[0], stepPos[1], stepPos[2]);
+					System.out.println("cell pos = " + VecOp.sub(stepVec, cellPos)); // Print each step position.
+				}
+			}
+		}
+	}
+}