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

Age	Commit message (Collapse)	Author
2011-08-15	woops. dot product should be clamped to [-1.0,1.0].	Anthony LaTorre

2011-08-15	fix nan bug by clamping dot() of surface normal and -photon direction to ↵	Anthony LaTorre
	[0.0,1.0]
2011-08-14	Rewrite the color_solid function in gpu.GPU (and associated CUDA code)	Stan Seibert
	to make it 100x faster. Instead of having each CUDA thread loop over the full triangle list, we give each thread a single triangle and ask it to look up the hit status and color for that triangle. The hit array and color array are small enough (approx 30,000 entries) to fit into the cache, so this goes much faster. Now the event viewer is quite snappy!
2011-08-14	Add a helper function to the ROOT Channel class that will populate 3	Stan Seibert
	arrays with hit information: hit or not, time and charge. Handy for fetching all the hits in an event into numpy arrays.
2011-08-14	Oops, view.py is still in use.	Stan Seibert

2011-08-13	Remove unused render and view files. They have both been superceded by ↵	Stan Seibert
	camera.py.
2011-08-13	A faulty optical process can make the position or direction of the	Stan Seibert
	photon into NaN on the GPU. Now we abort these photons rather than let them lock up the intersect_mesh() method. There is a new history bit (#31) that indicates when a NAN_ABORT has occurred, and this bit is checked for by GPU.propagate(). If set for any of the photons, a warning message is printed. While not as good as preventing the NaN problem in the first place, this at least ensures we are aware of the problem.
2011-08-13	For consistency, we should keep the water index of refraction down to	Stan Seibert
	200 nm, like all the other optical properties. It no longer is a speed benefit, anyway.
2011-08-13	Finally get GEANT4 to stop printing debug information about all the physics ↵	Stan Seibert
	processes
2011-08-12	merge	Anthony LaTorre

2011-08-12	do not check child nodes of a node at which the distance to the bounding box ↵	Anthony LaTorre
	is further than a triangle the ray/photon has already intersected
2011-08-12	Merge	Stan Seibert

2011-08-12	Use an input and output photon queue in order to consolidate all the	Stan Seibert
	photons that didn't die during propagation into the beginning of the list. This speeds up propagation by reducing the number of partially filled CUDA warps on the next propagation step. 2.2 million photons/sec on LBNE!
2011-08-12	merge	Anthony LaTorre

2011-08-12	speedup Mesh.remove_duplicate_vertices()	Anthony LaTorre

2011-08-12	Widen the field of view in camera to make it easier to look at Cherenkov ↵	Stan Seibert
	rings from inside the detector.
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	Segmented cylinder FOR MOAR SPEED! 1.8 Mphotons/sec!	Stan Seibert

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

2011-08-12	Storage for subtracks in ROOT data structure.	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.
2011-08-11	merge	Stan Seibert

2011-08-11	Tell CUDA to enlarge L1 cache.	Stan Seibert

2011-08-11	merge heads	Anthony LaTorre

2011-08-11	add consume() to itertoolset. checksum the number of bits shifted in each ↵	Anthony LaTorre
	iteration of the bounding volume hierarchy construction. only cache the bounding volume hierarchy information.
2011-08-11	No need for __noinline__ now that kernel caching works.	Stan Seibert

2011-08-11	Show number of registers used in CUDA kernels	Stan Seibert

2011-08-11	Switch from texture to float3 array for upper and lower bounds. 10% speed ↵	Stan Seibert
	boost!
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	Fix misuse of Material.set(), so now wavelengths and values of material	Stan Seibert
	properties are not transposed.
2011-08-10	Using gzip compression level 1, the BVH at 10 bit is 7x smaller. Adds	Stan Seibert
	10 seconds to cache load time if the BVH file is in the memory cache, otherwise this is faster if the BVH file must be read fresh from disk.
2011-08-10	Rename chroma.io to chroma.fileio to avoid collision with Python package ↵	Stan Seibert
	named io
2011-08-10	merge heads	Anthony LaTorre

2011-08-10	add the ability to cache a geometry along with its bounding volume ↵	Anthony LaTorre
	hierarchy. cached files are stored in $HOME/.chroma. fixed the timeit() decorator so that the decorated function is still able to pass back a return value.
2011-08-09	Automatically detect kernprof and profile main() in sim.py. Also ↵	Stan Seibert
	synchronize CUDA calls.
2011-08-09	The --use-fast-math gives the simulation another 25% speed boost.	Stan Seibert

2011-08-09	Autodetect presence of Space Navigator rather than require an option.	Stan Seibert

2011-08-09	Raise exception if unable to spnav_x11_open()	Stan Seibert

2011-08-09	Bug fix that caused sim.py to only record hits on the first 3 PMTs	Stan Seibert

2011-08-09	fix variable name in GPU.color_solids()	Anthony LaTorre

2011-08-09	merge heads	Anthony LaTorre

2011-08-09	switch to indexing child nodes by start and stop indices instead of start ↵	Anthony LaTorre
	and length; this reduces a bit of arithmetic when traversing the bounding volume hierarchy and makes the code in Geometry.build() more concise. add an untested cuda kernel to interleave the bits in three uint64 arrays.
2011-08-09	Put number of detected photons into charge value for channel.	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.
2011-08-09	Update camera to use SpaceNav over X11 protocol. Now events pass through ↵	Stan Seibert
	pygame loop.
2011-08-09	Update spnav ctypes wrapper to support X11-based communication.	Stan Seibert

2011-08-08	propagate() takes an array of photon offsets and a range of	Stan Seibert
	offsets to load. Now events with more photons than RNG states can be propagated through multiple kernel calls. Also lays the groundwork for consolidating photons between steps to reduce the amount of propagation work required.
2011-08-08	Record generated particle information in data structure	Stan Seibert