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

Age	Commit message (Collapse)	Author
2011-07-20	pulled a lot of the photon propagation code out of src/kernel.cu into ↵	Anthony LaTorre
	src/photon.h so that photon propagation by propagate() in kernel.cu and the hybrid monte carlo ray tracing use the same code. instead of a single state, photons now carry the history of the processes they've undergone. this history is stored as a bitmask; see src/photon.h. start_node and first_node of the mesh are now stored as global variables in mesh.h instead of being passed to kernel functions.
2011-07-19	removed STL pmt models; pmt models are now built by calling rotate_extrude() ↵	Anthony LaTorre
	on a profile of the PMT model (see build_pmt() in solids/pmts.py). triangle intersection now allows one of the two coefficients multiplying the vectors which span the triangle to float slightly negative (up to -EPSILON; EPSILON is defined in src/intersect.h) in order to eliminate rays passing through the line between two triangles. cleaned up a lot of unused code. pulled duplicate code in view() and render() into functions in view.py. in order to allow view.py and render.py to search pre-defined geometries, solids, meshes, etc. without requiring them to be pre-built, pre-defined geometries, solids, meshes, etc. should be returned by a function tagged by the decorator @buildable(identifier) defined in view.py, where identifier is a string used to identify the object as an argument to either view.py or render.py. optical materials and surfaces are now defined in optics.py. added an image directory to save cool screenshots.
2011-07-10	added a hybrid monte carlo ray tracing rendering algorithm	Anthony LaTorre

2011-06-24	speedup mesh intersection by skipping directly to the child node of nodes ↵	Anthony LaTorre
	with only one child.
2011-06-23	move photon initialization to the gpu. it's unclear if this is a speed ↵	Anthony LaTorre
	improvement.
2011-06-22	Switch from float4 to float3 for vertices.	Stan Seibert

2011-06-22	Fix accidental reuse of absorption_length when computing scattering length.	Stan Seibert

2011-06-21	Switch vertex list on GPU from a texture to a standard device array.	Stan Seibert
	This avoids the texture size limitation.
2011-06-20	pack material and surface indices into the fourth byte of the triangle array ↵	Anthony LaTorre
	on the GPU. you can now take a screenshot of an image rendered with view.py() by pressing the f12 key.
2011-06-19	reverse the face orientation on all triangles in the stl files exported from ↵	Anthony LaTorre
	sketchup.
2011-06-18	change curandstate array length to 100,000. gputhread.run() now correctly ↵	Anthony LaTorre
	initializes ALL of the states.
2011-06-17	visually tested optics code. added models of the inner and outer meshes for ↵	Anthony LaTorre
	the 12" hamamatsu and sno pmts. ratdb.py is able to parse ratdb files. chromaticity.py provides a function to map wavelength -> rgb color. lbne detector model now includes an outer black cylinder and pmts with a glass layer and photocathode/reflective surfaces.
2011-06-12	added some fun models; added some untested code to implement absorption, ↵	Anthony LaTorre
	scattering, reflection, and refraction
2011-06-07	Switch triangle texture to device array, use int32 and float32	Stan Seibert
	datatypes everywhere, and build final mesh without concatenation of lists. This allows for very large detectors, like full size LBNE.
2011-06-03	load material/surface index lookup arrays to the gpu and bind them to ↵	Anthony LaTorre
	textures. also, forgot to include the gpu code for material/surface structures
2011-06-03	load materials/surfaces onto the gpu	Anthony LaTorre

2011-06-02	material/surface codes or color are packed into the fourth byte of the ↵	Anthony LaTorre
	triangle data texture depending on the color keyword passed to Geometry.build()
2011-06-02	triangle mesh is now stored everywhere as a split list of vertices and triangles	Anthony LaTorre

2011-05-27	kernel ran off the end of the ray array	Anthony LaTorre

2011-05-20	faster bounding volume hierarchy construction	Anthony LaTorre

2011-05-18	added test likelihood	Anthony LaTorre

2011-05-18	added some more documentation and a more accurate miniature version of lbne	Anthony LaTorre

2011-05-17	added documentation	Anthony LaTorre

2011-05-16	added stl mesh viewer	Anthony LaTorre

2011-05-15	cleanup. fixed tests	Anthony LaTorre

2011-05-15	new geometry class. beginning to implement physics by defining a material ↵	Anthony LaTorre
	class; each triangle will have a material linked to both of its sides