1 files changed, 4 insertions, 3 deletions
diff --git a/sim.py b/sim.py
index 26a6b68..48bf313 100755
--- a/sim.py
+++ b/sim.py
@@ -44,6 +44,7 @@ class GeneratorProcess(multiprocessing.Process):
         self.material = material
         self.seed = seed
         self.queue = multiprocessing.Queue()
+        self.daemon = True
 
     def run(self):
         print >>sys.stderr, 'Starting generator thread...'
@@ -126,9 +127,6 @@ def main():
 
     print >>sys.stderr, 'RNG seed:', options.seed
 
-    print >>sys.stderr, 'Creating BVH for detector "%s" with %d bits...' % (options.detector, options.nbits)
-    detector.build(bits=options.nbits)
-
     print >>sys.stderr, 'Creating generator...'
     detector_material = optics.water_wcsim
     generator_thread = GeneratorProcess(particle=options.particle, 
@@ -144,6 +142,9 @@ def main():
     print >>sys.stderr, 'Starting GEANT4 generator...'
     generator_thread.start()
 
+    print >>sys.stderr, 'Creating BVH for detector "%s" with %d bits...' % (options.detector, options.nbits)
+    detector.build(bits=options.nbits)
+
     print >>sys.stderr, 'Initializing GPU...'
     gpu_worker = gpu.GPU(options.device)