chroma - Chroma is a high performance optical photon simulation for particle physics detectors

Age	Commit message (Collapse)	Author
2011-09-10	Add the ability to propagate the same photons multiple times on the	Stan Seibert
	the GPU, and run the DAQ multiple times on the same photons in a likelihood calculation. Propagating the same photons in a warp speeds up propagation by a factor of 3 (and we could do this even better if we wanted), and this improves the statistics in a likelihood evaluation quite a bit. Running the DAQ multiple times is also an inexpensive way to improve the quality of the PDF estimates.
2011-09-08	merge	Stan Seibert

2011-09-08	repeating_iterator needs a number of reps	Stan Seibert

2011-09-06	geometry on the GPU is now a struct created in the GPUGeometry class. coding ↵	Anthony LaTorre
	style for cuda code is now compliant with python PEP 7 -- Style Guide for C Code.
2011-09-03	Simulation.simulate() now accepts event.Vertex objects.	Anthony LaTorre

2011-09-02	update event structure. break gpu.GPU class into separate smaller ↵	Anthony LaTorre
	independent classes.
2011-08-25	A new PDF evaluation method that does not require storage proportional	Stan Seibert
	to [number of bins] * [number of PMTs]. Instead we accumulate information as the Monte Carlo runs in order to evaluate the PDFs only at the points required for the likelihood calculation. This new interface has been propagated all the way up from the GPU class through the Simulation class to the Likelihood class. We have preserved the full binned histogram implementation in case we need it in the future.
2011-08-23	Add a RootReader class that also functions as an iterator, also create	Stan Seibert
	a simple unit test for event reading and writing. There were several minor I/O bugs that are now fixed! Always test your code, kids!
2011-08-22	Expose interface to PDF creation on the GPU in the Simulation class.	Stan Seibert

2011-08-21	nreps was not actually being used properly by the Simulation class	Stan Seibert

2011-08-21	Add new nreps parameter to Simulation.simulate() to allow the same initial ↵	Stan Seibert
	photon distributions to be propagated multiple times. Default nreps is 1.
2011-08-20	sim.py displays help if run with no arguments	Anthony LaTorre

2011-08-18	Actually pass the max_steps variable in sim.propagate_photons to the	Stan Seibert
	GPU class.
2011-08-17	Add flag to Simulation() and Geometry.build() to ignore the BVH cache.	Stan Seibert

2011-08-16	Minor fixes to simulation. Default to 11 bit mode, fix print statement.	Stan Seibert

2011-08-16	Refactor sim.py into a reusable Simulation class that is called by the	Stan Seibert
	main function(). Also cleanup more event data structure names and add an nphoton value that is preserved even if you prune off all the actual photon vertices.
2011-08-16	Seed the numpy random number generator.	Stan Seibert

2011-08-16	Move general utility functions out of sim.py into tools.	Stan Seibert
	The enable_debug_on_crash() function sets the exception hook to start up PDB on uncaught exceptions The @profile_if_possible decorator applies the kernprof.py @profile decorator if available (because of profiling in progress), otherwise does nothing.
2011-08-16	Epic restructuring of code to switch to a generator-based style of	Stan Seibert
	event creation. Now we have vertex generators (that produce initial particles), photon generators (that create photons to propagate), and a standard data structure using Python class containers and numpy arrays to hand around the code. Also cleaned up some naming of things before they become conventions.
2011-08-12	Allow multiple GEANT4 generator threads to keep up with the speed of photon ↵	Stan Seibert
	propagation. Defaults to 4.
2011-08-12	G4Generator and sim.py can now generate boosted pi0 decays.	Stan Seibert
	The ROOT data structure has been extended to allow storage of the individual gamma rays as subtracks.
2011-08-12	Refactor ROOT file writing into fileio.root.RootWriter class	Stan Seibert

2011-08-11	Make the generator process a "daemon" process, so it will be cleaned	Stan Seibert
	up when the parent exits, and also start the generator process earlier.
2011-08-10	Set the GEANT4 and CUDA RNG seeds using current time and process ID if not ↵	Stan Seibert
	set on command line.
2011-08-10	Use WCSim properties for water with the lbne detector	Stan Seibert

2011-08-10	Rename chroma.io to chroma.fileio to avoid collision with Python package ↵	Stan Seibert
	named io
2011-08-09	Automatically detect kernprof and profile main() in sim.py. Also ↵	Stan Seibert
	synchronize CUDA calls.
2011-08-09	Bug fix that caused sim.py to only record hits on the first 3 PMTs	Stan Seibert

2011-08-09	Store a photon history for each hit channel. If multiple photons hit the	Stan Seibert
	same channel, their history bits are OR'ed together.
2011-08-08	Record generated particle information in data structure	Stan Seibert

2011-08-08	Oops. The generator is a process, not a thread.	Stan Seibert

2011-08-08	Merge Tony's changes.	Stan Seibert

2011-08-08	Modify data structure to hold photon start and stop vertices separately.	Stan Seibert
	Add --save-photon-start and --save-photon-stop options to sim.py to save these vertices. Otherwise, only hit information is recorded.
2011-08-08	toggle fullscreen mode with f11 key. use matplotlib colors maps defined in ↵	Anthony LaTorre
	matplotlib.cm.
2011-08-08	Switch sim.py to spawn a separate process for GEANT4 and start it generating	Stan Seibert
	photons while the detector geometry is being built.
2011-08-08	add a simple event viewer. view events by running ./camera.py ↵	Anthony LaTorre
	<detector_name> -i <name_of_io_file>.
2011-08-05	Run a short dummy GEANT4 event to force it to load the tables before	Stan Seibert
	the timer starts on the real events.
2011-08-05	Fix typo in setting direction of particle from sim.py command line.	Stan Seibert

2011-08-04	First attempt at a simulation program using Chroma.	Stan Seibert
	Loads a geometry specified on the command line, uses GEANT4 to create initial photon vertices, propagates with Chroma, then writes the DAQ-level hit information out to a ROOT file.