First of all, you need the make the detector tag known to org.lcsim, which is done in
.lcsim/alias.properties
and add a line to it in the format detector tag: directory containing the geometry files (compact.xml, clichcalstack.heprep)
clichcalstack: file:///home/marcel/demo/stack
this allows you to use the correct geometry. Analysisng then is quite straightforward, the following driver shows some ideas
import hep.aida.IHistogram1D;
import java.util.List;
import org.lcsim.event.EventHeader;
import org.lcsim.event.SimCalorimeterHit;
import org.lcsim.geometry.util.CalorimeterIDDecoder;
import org.lcsim.util.Driver;
import org.lcsim.util.aida.AIDA;
public class StackAnalysis extends Driver{
String calcolname = "HCALCalorimeterHits";
private AIDA aida = AIDA.defaultInstance();
public StackAnalysis(){
}
protected void process(EventHeader event) {
super.process(event);
List<SimCalorimeterHit>calorimeterhits =
event.get(SimCalorimeterHit.class,calcolname);
// make a histogramm
IHistogram1D hitlayer=aida.histogram1D("Layer Profile", 100, 0, 100);
IHistogram1D hit_x=aida.histogram1D("Hit Pos X", 500, -500, 500);
IHistogram1D hit_y=aida.histogram1D("Hit Pos Y", 500, -500, 500);
IHistogram1D hit_z=aida.histogram1D("Hit Pos Z", 1000, 2000, 5000);
// loop over hits ...
for (SimCalorimeterHit calhit: calorimeterhits) {
aida.cloud1D("Hit Energy").fill(calhit.getRawEnergy());
// get the CellID decoder
CalorimeterIDDecoder iddecoder = (CalorimeterIDDecoder)calhit.getIDDecoder();
iddecoder.setID(calhit.getCellID());
//get the layer
hitlayer.fill(iddecoder.getLayer());
// get x and y
hit_x.fill(calhit.getPosition()[0]);
hit_y.fill(calhit.getPosition()[1]);
aida.cloud2D("Hit x vs y").fill(calhit.getPosition()[0],calhit.getPosition()[1]);
hit_z.fill(calhit.getPosition()[2]);
aida.cloud2D("Hit z vs layer").fill(calhit.getPosition()[2],iddecoder.getLayer());
// get the timing
aida.cloud1D("Hit Timing").fill(calhit.getTime());
}
}
}