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issues¶

CSG Intersect Comparisons
- Approaches ?
- cfg4 review
- makeSolid
GScene compareMeshes : bbox comparisons
- Classification of top 25 issues down to 1mm
- Review Revisit
- After CSG_SEGMENT handles the tube deltaphi
- parsurf vs g4poly bbox chart
- bbox differences : review the top of the chart
- lvidx66_again (4)
- lvidx_65_69_56_tube_deltaphi (1,2,3) HAVE BEEN KNOCKED DONE TABLE
- lvidx68 (5) + lvidx55 (8) + lvidx17 (9) + lvidx103 (10) + lvidx131 (11)
- lvidx83 (6) + lvidx81 (7) both coincidence artifacts between cylinders and cones
- lvidx31 (14) lvidx30 (20): difference of large thin-z cones intersecting with cylinder : worst case for parsurf bb precision
- lvidx46 (15)
- lvid 39 : FIXED : 1214.74 OcrGdsTfbInLso0xbfa2370 cone-z should be centered
- lvid 185 : FAILED POLY false alarm
- lvid_41_40_39_23_38 : five with no par surface points : ~FIXED by move to adaptive
- try comparing CSG_BBOX_PARSURF against CSG_BBOX_G4POLY
- fixing the placed bbox difference bug moves lvid 30 down the chart
- tri.GMesh.bbox vs ana.CSG.bbox diff table
- GMesh bbox diff table
lvidx66 (formerly in 4th) NOW IN POLE POSITION
- Using loaded CSG vs generated NNodeTest
- parsurf surface points not getting above x=0 ?
- surface points with difference switch to union
- surface point debugging
- overview
lvidx_65_69_56_tube_deltaphi
- TODO
- Intersect with nconvexpolyhedron rather than two slab intersects ?
  - Trapezoid is similar
- Revisit again following move to CSG_SEGMENT
- Revisit following tube deltaphi via two slab intersects
- Are the top 3 biggies all tube deltaphi ?
- Looks like lvid 56 too
- NCylinder : how to do phi segment SDF ? think 2 cutting planes
- multi unbound ?
- Hmm looks like it got balanced and messed up in the process
- Allowing double unbound
- disabling balancing is not a solution
lvidx 56 RadialShieldUnit0xc3d7da8
- Viz : following move to CSG_SEGMENT python primitive (phi0,phi1,z,rmax)
- Issues with two slab intersects : AVOIDED BY MOVE TO CSG_SEGMENT
- parsurf bb is kinda mute because raytrace not working
- dumping the raw and blanced trees
- Raytrace tree height limit : max 7
- opticks-tbool 56
- Checking tree balancing with slab cuts
lvidx69 : segment ring with 4 box cuts
lvidx 65 : two box cuts from segmented ring : SstBotCirRibBase0xc26e2d0
- CSG
- GDML
lvidx67
- Viz
lvidx30
lvidx140 (19)
- Viz
- tbool
lvidx46 (15)
- Summary
- parsurf xy slimmer
- Viz
- GDML
- opticks-;opticks-nnt 46
lvidx31
lvidx131
- parsurf.bb.min.z goes lower
- manual bb matches parsurf
lvidx103
- Issue : parsurf bbox bigger in z, g4poly bb misses both zsphere ends of capsule
- viz
- opticks-;opticks-tbool-vi 103
- GDML
- G4DAE
lvidx 17 : g4poly (coincident union) misses T-bottom of the H girder
- Issue : parsurfbb.min.z is -12 mm off from g4polybb.min.z
- Viz
- G4DAE : min.z is -135 here !!
- Huh : manual bb calc matces parsurfbb, note union coincidence at z=+-135
- GDML : Corresponds with my CSG python.
- bb deviation chart
lvidx55 : 20 mm : position 8
lvidx81 : position 7 : 26mm
lvidx68 : in at position 5 : 320 mm : SstTopHub0xc2643d8 : TODO : difference out the inner cy
- Summary
- 320 mm
- g4poly bbox vs parsurf bbox
- opticks-tbool-vi 68
- op –dlv68 –gltf 3
lvidx 83 : 28.0747 : OcrGdsTfbInLsoOfl0xc2b5ba0 : TODO uncoincide dicyco
- issue : parsurf min.z goes lower
- Ahha uncoincide : doesnt kick in for straight dicyco
- opticks-;opticks-tbool-vi 83
- g4poly bbox vs parsurf bbox
Five volumes 41 40 39 23 38 with no par surface points
- checking the csg type mask of offenders, using current default parsurf_level=2
- From CSG_BBOX_PARSURF against CSG_BBOX_G4POLY
- opticks-;opticks-nnt-vi 41 40 39 23 38
- Increasing parsurf_level yields some surface points
lvid247
Impinging Volumes
- Plan
- NEXT
- Insights from RTCD p81
- Float Precision
- How to do object-object testing ?
- Parametric Convex Polyhedron ?
  - Check SDF values of one object for surface verts of other object
- Checking Composite Surface Point Generation
- tgltf-t : Look at gds example
- Whats the appropriate fix ?
- Are there missing transforms ?
- NScene::check_containment checking bbox containment of all node/parent pairs
- NScene::postimportmesh
- Checking the solids individually
lvid 30 OcrGdsTfbInLso0xbfa2370 : cone-z misinterpretation
- After fixing the bbox zeros still appearing with Z offset issue
- HUH : THOUGHT FIXED BUT STILL SHOWS UP : DUE TO BBOX ZEROS
- FIXED
- CSG bbox looks unreasonable
- Succeed to Reproduce the issue in a small test
lvidx65 : SstBotCirRibBase0xc26e2d0 /dd/Geometry/AdDetails/lvSstBotCirRibBase0xc26e220
- lvidx65 : First Cause : tube deltaphi is not handled
lvid 185
- Issue bbox v.diff
- Diagnosis : failed ana polygonization (gltf 3 looks fine)
- DBGMESH=MOFTTube0xc046b40 NSceneMeshTest
GDML cone/tube z-interpretation
FIXED : lvid 66 : unbelievable big impingement : trapezoid/convexpolyhedron machinery bug
- Issue FIXED
- After fix : surface coincidence
- Before fix : huge (1025mm) impingement
- Running with just 2 nodes of the geometry
- Inspecting GDML
- DONE : fixed tbool bash/python generation to handle convexpolyhedra such as trapezoid
  - tbool90 : parent node big cylinder
  - tbool66 generated
Geoselection at py level inconvenient
Analytic Geometry Shakedown
- Issue : flickery ray trace in rib shape
- Impinging Volumes Test
- DONE: auto-detect intended unions with coincident faces, and auto-uncoincide them
- DONE : Generalized intersect test
- tgltf.py
- NCSGScanTest
- Issue : upward yellow cone lid photons think start in Ac
  - GScene::dumpNode
  - Approach ? Decide to implement recursive geo selection to onion in on the problem
NScanTest zero crossings
- not outside ?
- NScanTest table (0.1 mm step)
- Status Check Revisit
- Lvidx 85 Uncoincide Fail
- Tree level z-nudging of unions of cylinders and cones fixes most odd nzero crossings
- lvidx 29 : wierd nzero 5
- Visualizing problem geometry
- Visualize nzero 3,5,7
- With some uncoincidencing
- Central x,y -z to +z scanline
- extras/66 fails to load : problem with planes
- tree level uncoincidence ?
Analytic Triangulated Viz Differences
- DONE : Mostly fixed by move to absolute tree approach
- DONE
- LEAVING AS IS : mesh ordering different in gdml and dae branches
- assimprap/AssimpGeo
- Partial Geometry Control And Analytic Geometry ?
- Launchers
Test Fails
Full Analytic Route Needs Material Hookup
- TODO : C++ alignment + cross accessors
- GMergedMesh expecting relative ?
- mesh index alignment looks like simple offset wont work
- DONE : sensor crossover
- DONE : gltftarget(config) and targetnode(metadata)
- DONE : analytic/triangulated tree alignment for full traversals
- GGeo/GGeoLib
- GDML File LV volume elements have material refs
- Whats needed for analytic material ?
- Contrast with G4DAE/Assimp route
- Analogous paths in the two routes
CSG Coincidence Speckle
- FIXED : Very Thin Cylinder Speckles in CSG difference holes
- Complex box cuts from hollowed cylinder speckles
FIXED : CSG Deep Trees (solid level issue)
- FIXED : DYB has some deep CSG trees
- Lots of subtraction of rotated boxes : results in deep trees
- How to handle deep unbalanced trees ?
- Non Mono Balancing ?
- Checking Deep Volumes with tboolean-deep
- sc.py KLUDGE SKIPPING deep CSG until work out how to balance
- Deep Volumes, 22 out of 249 are have tree height > 3
- Enumerating Distinct Top Solids
- Big node trees
- Final Deep Tree
GDML-glTF Geometry Route Transform Debug
- Review Transforms
  - CSG and Structural Transform workflow
- Issue : PMT gets scrambled when apply global placement transform
- FIXED : top level (non-instanced) transforms ignored by raytrace
- FIXED : PMTs pointing in reverse direction !
  - Red Herring
- GDML/glTF route
  - GDML Stage
  - GDML Manual Unhelpful
- GLM Euler
- GDML/glTF Tracing Transforms
Leftfield Error Following BFile change attempt
- FIXED with help from Guard Malloc
- QUICK TIP : USING Guard Malloc
- ISSUE : early crash of OKTest when invoked with some arguments
- Guard Malloc : points to GGeo instanciation
- Test Fails
- Full Build : without optionals
- Initial Indication of corruption in NSensorList
- Guard Malloc doesnt get along with OptiX
oxrap OInterpolationTest asserts at python level for lack of IDPATH GBndLib.txt
- FIXED : OInterpolationTest PASS depending on CInterpolationTest having been run recently (/tmp unwiped)
- Hmm SG Fail
- Dec 2017 : OInterpolationTest FAIL back again, IMPROVED ERROR HANDLING : NOT FIXED
- Oct 2017 : FIXED old chestnut
- June 2017
- Another lack of GBndLib issue in CTestDetectorTest
Malloc Debugging
- how malloc works
- malloc_history
- libgmalloc
- leaks
- Detecting Heap Corruption
Fabstep Targetting
Review Progress and Where Next ?
- Immediate
- Recent Progress
- TODO : j1707 review size of GPU buffers, any more instancing possible ?
- TODO : j1707 deep trees, expand balancing to handle ?
- TODO: get verbosity under control in GDML/glTF route especially GParts
- TODO: deep csg trees are still being skipped
- TODO: polycone testing, general coincident surface testing(how?)
- TODO: zero-repetition scene data structure
- TODO: analytic path caching
- TODO: thin solid polygonization
- TODO : Push CSG node tree support thru to cfg4
- NOPE : More Primitives
- What is needed to add primitives
- NOPE: Add NPolygonization of partlist ?
- What is NOT needed for each primitive ?
- DONE: tboolean-pmt converts ddbase.py PMT into NCSG node tree
Polygonization Fails Producing Large BBox Placeholder
Clipping Mode With GDML/glTF geometry make instances disappear
- Issue
- FIXED
- OpenGL gl_ClipDistance
- Clipping in oglrap and okc
Greenfield Installation Testing
- opticks-t fails
- Greenfield run errors
- Error Report from Axel
- Checking Green Field Opticks Installation
- BUT CMake has some hardcoded paths ??
- Tests using optional externals, need detection of the externals presence
Polygonization Zippering Boundaries
- Zippering Realizations for CSG union of box and sphere
- OpenFlipper Boundary Snap
- Mesh zippering
- Investigate boundary loops with modded combine_hybrid
- Leftmesh frontier “ribbon” with outer and inner boundary edge loops
Polygonization Sqrt3 Subdiv
- Overview
- Higher Level Approaches
- BASH Funcs
Meshes from Parametric Shapes
- Joining Endcaps to body
- Facemask splitting
- Refining boundary faces
- Boundary curve ?
- Objective of parametric geometry description
- Welding with OpenMesh ?
  - Joining meshes
- Review Parametric Approaches
  - par
Too Many Ridx Instances
- Can siblings be grouped into added subtrees in crowded nodes ?
  - Where to implement sibling grouping ?
  - Finding nodes with lots of children
- General Sibling grouping
- Initial Approach
- GTreeCheck triangulated approach
Subtree Instances Missing Transform
- FIX/WORKAROUND not yet sure which
- ISSUE : GMergedMesh subtree assemblies missing transform ?
- A similar issue for global ridx 0 solids was handled with isUsedGlobally
Max CSG Height skipping, effectively prunes progeny of nodes with overheight csg
GLFW/OpenGL GPU Hang
CSG BBox Dont use the characteristics of CSG operations to trim bbox
Targetting Non Existing Volume
Opticks Analytic Scene Description
- ISSUE : Polygonization Repetition
- gltf samples
- TODO : make input serialization smarter ? avoiding repetition
- TODO: Converting GDML description into instance-ized CSG trees “OpticksSceneGraph”
CSG Complement
- TODO: Look into and handle when intersecting two complemented solids
- FIXED ISSUE : complemented solids via normal flip yields unexpected intersections (mirror object)
- Background
- CSG Single Hit Ray Trace Sub-object combination tables
- Difference is Equivalent to intersect with complement
FIXED: Invert TRS Mismatch
- ISSUE
Analytic Scene
- Detdesc generation
- Multi File Detdesc Parsing with ddbase.py ?
NCSG Translated PMT
- ISSUE : ImplicitMesher fails to polygnonize thin volumes
- FIXED : ImplicitMesher fails to find surface
- FIXED: manual seeding headed in wrong direction
- FIXED : Missing physvol placement transforms
- FIXED : Cathode Inner or Outer
CSG Transform Support
- Transforms with Ray-trace and SDF
- Use higher level optix geometry transforms ?
- FIXED : funny normals back again following scale fix
- FIXED : SPHERE SCALE TRANSFORM ISSUE
  - Investigation
  - What is sphere intersect assuming that box intersect isnt ?
- FIXED ISSUE : Extra intersects with ellipsoid
- FIXED : Rotated geometry shows invalid boolean surfaces
- FIXED : All nodes in CSG tree with gtransformIdx 1 ?
- input csg very spartan
- can partlist work with derived bbox ? does not look like it
- move bbox calc to GPU
- SDF
  - local/global transforms ?
- Transform references
  - Need to make space in part/node buffer for transform referencing
- Transforming Rays
- Transforms GPU side
- Transforming BBox ?
- Models
- Where to hang the transform ?
  - parent.rtransform OR node.transform ?
tpmt broken by OpticksCSG enum move
- Vague recollections
- 2017-10-20 tpmt– broken (again) : QUALITATIVELY FIXED
- Slice testing to isolate z-offset part
- FIXED : two physvol offsets not being honoured
- GPU dumping : note parallelised shuffle
- old overview
- 2017-10-20 issue : boundaries not getting into the GParts ?
- Review NCSG::Deserialize boundary handling
- revisit tpmt–
- root cause of difficulty
- symptom3 : surface attachement failure
- symptom 2 : CPU/G4 cfg4/CTestDetector misunderstanding primordial CSG buffer ?
  - looks like okg4 not updated since primordial GCSG
- FIXED : symptom 1, GPU side mis-interpreting parts buffer after enum change
- review of analytic PMT serialization
  - Comparing existing serializations
Triangulation of CSG defined geometry using SDF
- Bottom Up Much Faster with Coarse then Nominal approach
- Dual Contouring Sample
Multievent Performance
- Observations about performance : large pinch of salt
- VM growth indicates are just leaking
- 0.5M tpmt timings very different now
- Next Steps
  - DONE : Get compaction operational in multievent setting
  - G4
Production Performance
OptiX CUDA Interop With 3080
- FIX
- Reference
- Overview of seeding interop
Boost Visibility Linker Warnings
- Issue : many linker warnings
- Solution ?
- Cause
FIXED : Invisible Propagation
- Fix
- Issue
Natural Gensteps Shakedown
- FIXED : by getting G4StepNPY.cc to handle mixed gensteps
- Issue : no visible prop, all photons missing geometry
Odd Photon Flag History ?
- Issue
- DEFERRED
- TODO: migrate dscale
- cu/propagate.h
- Issue Where is the Reemission ?
FIXED : Automated Interop Tests
- Former Issue
- How Fixed
- Actually already have –noviz/-V* option
- Detecting CTest Running ?
Event Layout Awkward
- First Stage of Migration Done
- New Layout Idea
- Questions
- Current Layout
Linux Interop Buffer Overwrite
- Following changes for OptiX 400 Assumed Similar Issue Still Manifest
- Weihai Investigations
FIXED : OptiX 400 Interop Wierdness
- TODO
  - check performance implications of OptiX zeroing ?
- FIXED : missing creation mode metadata
- WORKAROUND : OptiX zeroing record buffer in generate.cu
- Debug Approaches
  - OOAxisAppCheck
- GGeoViewTest : Interop and Compute Mode not matching
  - interop
- tpmt– : origin attraction and swarming
- FIXED : interop : fail to pullback/persist sequence buffer
- op –cerenkov
  - interop
  - compute
optix 400 : seedPhotonsFromGenstepsImp FATAL : mismatch between CPU and GPU photon counts
- Focussed workaround on gensteps using OpticksBufferControl
- Issue
OptiX 400 Shakedown
- optix 400 : seedPhotonsFromGenstepsImp FATAL : mismatch between CPU and GPU photon counts
  - Focussed workaround on gensteps using OpticksBufferControl
  - Issue
- FIXED : OptiX 400 Interop Wierdness
FIXED : Composition Not Targetted with Loaded Event
- The Fix
- Former Problem
- Approach : persist gensteps together with evt and use for targetting
Box Asymmetry
CFG4 PMT Edge Double Reflect
- FIXED : a TIR bug
Geocache Versioning ?
Borked Photon Record Colors
- where do the colors come from
JPMT Scint not working
Leaky Triangulated Box
- Summary
- Initial Observation
Leaky Analytic Sphere
- Executive Summary
- Refs about floating point epsilon
- Polar Leak
- Scaling the BBox
- Radial Shooting from all directions
Moving Bookmarks
Nopstep failing to appear : viz debugg
Optical Local Time Goes Backward
PhotonsNPY Update for structured records ?
PMT Distributions
PMT Test
[FIXED] Rdr upload count mismatch
Scattering : GdLS missing RAYLEIGH
Scintillation Photons
- Tracing thru Opticks
- G4Scintillation
- DYB Scintillation props
Torch Stratification
- Summary
- Issue
- Visualization Artifact Only ? NO
- Time Banding
- Time Compression Artifact ? YEP
- Improve Time Compression ?
- Changing Position/Time Domain used for record compression
- Position Compression Artifact ? Dont think so
- Refs
Surface Debug : lacking hits due to surface/volume model mismatch
- Chroma Solution to same issue
- How to do this with GGeo ?
- Approach using AssimpGGeo::convertSensors
- Possibly a problem with PMT normals ?
- Detdesc dive
- Sphere Sphere Intersection
- How to try some simple replacement cathode ?
- Analytic OptiX geometry
- Triangulated Case
- Now with simplified OptiX geometry
Union Splitting
- Mesh mending
- Visualisations
- applying fix to fuller geometry
- oav fix
- Check Topology of Meshes
- Where to do mesh fixing ?
- Mesh Surgery implemented in openmeshtest-
- G4DAE/G4 triangulation code quickly goes down rabbit hole
- Idea mesh scanning to identify internal faces
- ExplodeZVertices makes it obvious that have two closed meshes, not interior faces of one
- Single face eyeballing
- Numerical view
- many upwards going photons think their m1 is Ac when actually Gd
- Isolate issue to single volume : 3158
  - OpenGL Eyeballing
  - NumPy Look at faces/vertices
- Next volume : 3159, same structure acting OK
- Check at detdesc level
  - ~
Offset Vacuum Base
[RESOLVED] Containing Material placeholder leading to DUD in buffer
- Issue
Groupvel Related issues
- Optical Photon Propagation Times need to use GROUPVEL
- Groupvel Kludge Unintended Consequences
geant4_opticks_integration
- tconcentric
  - setup
  - remnant pflags discrep ?
  - RESOLVED seqmat truncation difference, c2 down to 0.91
  - seqmat still some truncation difference ?
  - seqmat mismatch mostly resolved
  - psel selection of truncated
  - opticks seqmat
  - ISSUE: seqmat mismatches, zeros
  - how should truncation be handled ?
  - ISSUE : negative times on exceeding time domain
  - RESOLVED: bad REjoin onto scatter, 3 in 1M
    - elaborated fix
    - initial fix
    - issue rare SC/AB at truncation
  - MOSTLY RESOLVED: pflags inconsistency : due to incomplete REjoins, AB not scrubbed and replaced with RE
    - Mostly Resolved
  - Nov 4, 2016 : seqhis chi2 now less than 1
  - RESOLVED : scattered counts and distrib mismatch
  - MATCH : no selection CFG4/OK rayleigh scattering in isolation
  - RESOLVED : scatter discrep
  - FIXED : wrong wavelength compression/decompression in CFG4
  - ASIS : polarization de-normalizing
  - viz
  - truncation control
  - FIXED Longstanding pflags issue
  - FIXED : Opticks not doing “TO BT BT BT BR ..” by polz correction
  - FIXED : chi2 large contribs from SC lines
  - dbgzero lines
    - seqmat truncation discrep, lots of zeros in tail
    - pflags
    - FIXED seqhis
  - remaining discreps by cmx selection
  - truncation avoidance trick
  - zeros in long tail issue, from truncation ?
  - with flags fixed
  - FIXED : funny badflag 00
  - avoiding truncation by pushing bouncemax and recordmax
  - switch to unified model fixes incorrectly specular DR
  - post DR discrep
  - seqhis after optical surfaces hookup with test geometry
  - seqhis
  - lack DR due to lack of complete Optical Surface ? with test geometry
  - topline 8ccccd 4% Opticks deficit
- Profiling Duplication
  - TODO
  - OpticksProfile
  - Related : npy-/Timer
- Boolean CSG on GPU
  - TODO: numerical/chi2 history comparison with CFG4 booleans
  - TODO : python trees into opticks
  - TODO : randbox photon source
  - TODO : more natural test tree construction
  - TODO: support transforms in op nodes
  - TODO: support empties, ie non-perfect trees
  - TODO : algorithm characteristic comparisons
  - Boolean Debugging
  - DONE: boolean csg tree implementation
  - FIXED Issue : ray trace “near/tmin” clipping fails to see inside booleans
    - scene_epsilon
  - FIXED Issue : boolean insides invisible from outside
  - FIXED : Issue : cannot see booleans from inside
  - FIXED : Issue : ray trace of box shows slab intersects extending behind the box
    - CUDA fminf/fmaxf/max infinity/nan handling ?
  - FIXED Issue : boolean intersection “lens” : boundary disappears from inside
  - FIXED Issue : lens not bending light
  - approach
- SurLib with Test Geometry
- tpmt
- Review Analytic Geometry Workflow
  - Changes needed
  - Test Geometry
- Sliced Composited Raytraced Rasterized
  - Test geometries
  - Oglrap
- Tracer Crash
  - Tidy Actions
- OKG4 G4GUN Shakedown
  - Red Gensteps everywhere issue
  - Tao commit changing Scintillaton and Cerenkov
  - Debug running
  - Peculiarities
  - Known sources of difference
- JUNO JPMT Shakedown
  - Issue : default torch source goes off somewhere in TT
  - Issue : segv due to no input gensteps
- Material Code Mapping Generalization
  - env/chroma/G4DAEChroma
  - Mapping Codes ?
  - Where is genstep path configured ?
  - Review Genstep
  - Issue : Sep 2017 : Still getting lookup fails
  - Issue : Dec 2016 : Lookup fails with live g4gun
  - Legacy Approach
    - Translate on load
    - Lookups
  - Changes
- Geant4 Optical Code History
  - Geant4 On Github
  - Scattering Bug
  - ProposeVelocity does nothing as CalculateVelocityForOpticalPhoton is repeatedly called
  - GROUPVEL From Wrong Material Issue ?
- GROUPVEL
  - Approach
  - Issue 1
  - Issue 2
  - See Also
  - Transport gets velocity from preStep
  - GROUPVEL Injection at tail of PSDIP has no effect
  - Can I replace G4Transportation with a debug version ?
    - AddTransportation
  - DsG4OpBoundaryProcess dumping : looks like getting groupvel from Ac instead of LS and MO
  - Back to basics after moving to fine domain (1nm)
  - tconcentric check
  - Review
  - Now get G4 warnings when run without groupvel option
  - Opticks GROUPVEL
  - G4 GROUPVEL
- Reemission Review
  - recsel segv : last one issue
  - fixing REJOIN recording
  - checking matching with extremes of material properties
  - switch off reemission with nore option
  - tlaser : sizable differences in many categories : how to proceed ?
  - push stats to 1M have 35 CRecorder/Rec discrepant seqhis/seqmat
  - seqhis machinery inconsistency between CRecorder and Rec
  - How to proceed ?
  - Adopting DYBOp into CFG4
  - REEMISSIONPROB is not a standard G4 property
- Multi Event
  - Overview
  - FIXED : Issue
  - FIX
  - Workaround
  - Things to try
    - DONE : bufferTest.cu bufferTest.cc
    - Trivial Program works
- tconcentric_distrib
  - Look for presentational hists
  - Comparing interpolation blib
  - After move to c2shape comparisons : listing seq points with sum of distrib chi2 > 20
  - DONE machinery shakedown
  - multiplot slice(0,10) quick look
  - tconcentric agreement sufficient to move on to distribs
- tconcentric pflags mismatch from_truncation handling
  - Status
  - Issue
  - FIXED BY ENFORCING HARD_TRUNCATE IN CANNED RUNNING
  - Internal CFG4 Opticks event inconsistency
  - CRecorder::RecordPhoton
  - tconcentric.py
  - Selecting mismatch using PFLAGS_DEBUG
  - Dump first mismatch photon
  - Dump 2nd mismatch
  - Truncation handling
- post recording has seqmat zeros
  - Overview
  - After Fix seqmat chi2 is 0.93
  - FIX REQUIRED matSwap BASED ON NEXT BOUNDARY
  - Issue
  - Cause
  - Opticks code check shows no kludging for DR SURFACE_DREFLECT
  - CFG4 Dumping of mismatched photons
  - Flags : NA NAN_ABORT actually means boundary status StepTooSmall
  - Differences between live and canned modes of CRecorder
- Review Geant4 Stepping Time Velocity
  - where does G4 set times anyhow ?
  - G4TrackingManager::ProcessOneTrack
  - G4Step::InitializeStep Track->PreStepPoint
  - G4StepPoint::AddGlobalTime
  - G4Step::UpdateTrack PostStepPoint->Track
- Interpolation Mismatch Continued
  - Issue
  - TODO: check time distrib diff matches expectation from groupvel interpol mismatch
  - Testing finebndtex
  - How to up samples ?
  - Possible Approaches to reduce interpolation mismatch
  - Dumping Interpol deviations
- SURFACE_DREFLECT (DR) diffuse reflection
  - issue : now resolved
  - CFG4 SURFACE_DREFLECT from LobeReflection or LambertianReflection
  - Cause of discrepant reflection, different imps
  - Reimplement Opticks diffuse reflection
  - SURFACE_DREFLECT discrepant polarization b,c
  - NumPy DoReflection calc
  - chi2 after fix, notably the pflags decreased from 1.21 to 1.07
- Test Fails
- SURFACE_ABSORB
  - NEXT
  - dbgseqhis
  - Boundary 37 (with os:RSOilSurface) : wrong way around ? inner not outer surf ?
  - Concentric test
  - Compare with tdefault where photons distributed randomly from point source
  - Complement checks...
  - Visual inspection of photon termination points
  - Surface info comparison with CInterpolationTest and OInterpolationTest
  - Commenting out ESRAir reflectivity diddle doesnt fix the 20%
  - 1M 2016 Oct 28 seqhis
  - SA Opticks
  - G4 SA
- tlaser
  - 1M 2016 Oct 28 seqhis
  - DONE: badflags fixed by categorizing SAM:SameMaterial as BT in cfg4-/OpStatus
  - DONE: property comparison using G4 interpolation and Opticks tex interpolation
  - Using constant material prop values gives much better agreement
  - With fixpol doesnt change much
  - Progressive masking for following discreps step by step
  - After REJOIN fix still large discreps, eg top line SA
  - Optical Surface Trace
  - Prior to fixing aim
  - Laser aim issue
  - after fix aiming, restricted to top seq
  - After fix CG4 skin surfaces
  - Termination boundaries
  - probable cause CG4 logical skin surfaces lacking lv
  - After fix CG4 logical skin surfaces
  - full seq following fixed aim
  - initial ana
- Badflags
- Interpol Mismatch
- tboxlaser
  - check fx machinery
- tbox
- OKG4 tpmt revisited
  - FIXED : CTestDetector::kludgePhotoCathode was incorrectly using dielectric_dielectric
  - Perhaps surface conversion not yet implemented for CTestDetector ?
  - G4 EFFICIENCY
  - Divergence following many changes : g4 not stopping at cathode ?
  - FIXED : tpmt takes exception to duplicated OpaqueVacuum material name
- Missing CFG4 Surface Detect
  - Issue
  - Observations
  - Fixed ? N
  - CGDMLDetector vs CTestDetector
  - Writing G4DAE Optical surfaces
  - Reading G4DAE/ggeo Optical Surfaces
  - Ancient GDML Export has no surfaces OR optical props (is also has no material properties)
  - CGDMLDetector::addMPT
  - CGDMLDetector::addSurfaces ?
  - NEXT
  - Code Trace photon SD flags
- OKG4 Torch Shakedown
  - Issues Overview
  - What would be useful for debugging ?
    - tlaser testing
    - seqvol : volume sequence indexing
  - Simulation
  - Analysis
  - Viz
  - Initially not in same ballpark, after an afternoon get into same ballpark
    - zero flags, SR?
  - dbgseqhis c0cac0cccd
  - FIXED : Positional bug
  - bouncemax zero check
  - FIXED : Material reporting with CG4
- seqvol : volume sequence indexing
  - tlaser node index dumping
  - dbgseqhis
  - Where did the surface handling come from in Opticks...
  - op –bnd : shows no isur/osur duping but there are more skin surfs that border surfs, SO THIS IS A BUG
  - optical_buffer
  - closest_hit_propagate
  - instance_identity comes from the intersects
  - mesh_intersect
  - identityBuffer
  - FaceRepeatedIdentityBuffer
- OKG4 vizg4 noshow
  - Issue
  - tpmt.py
  - tokg4.py
- G4/Op Integration Overview
  - Objectives
  - See Also
  - DONE : High Level Cleanup/Refactor
  - WIP : Multi event handling
    - TODO : G4 driven multievent
  - DONE : init and per-event distinction
  - DONE : Optical Step Collection
  - DONE : Material Code Mapping Generalization
  - DONE : Integrated G4GUN running
  - DONE : genstep handling rationalize
  - DONE : avoid duplication between OKMgr and OKG4Mgr
  - NEXT : OKMgr/OKG4Mgr propagation multi-event test
  - NEXT : loaded propagation viz lacks index
  - NEXT : OKG4 genstep shakedown
  - WIP : Integrated Torch running debug
  - FIXED : OKG4 : Material Map chicken/egg problem
    - Mapping A
    - Mapping B
    - Fix
  - NEXT : G4/Op Comparison of generation distribs
  - NEXT : event handling in integrated mode
  - NEXT : move CG4 event creation later for multi-event
  - Approach
    - ggeoview-/App
    - OpticksEngine base class
    - OpticksApp
    - How does Opticks and G4 need to interface ?
  - DONE
  - DEBUGGING
  - TODO
- Interop Failures
  - FIXED : Interop mode with seed buffer : get hard crash even with trivial
  - Trying to do raytrace when loaded, fails for lack of record buffer
  - Multi event testing CUDA memory error
- Multi Event : Seed Stuck at Zero for 2nd Event
  - Interop Mode
    - WITH_SEED_BUFFER
  - Compute Mode
  - DONE: Getting OptiX to notice CUDA/Thrust change to Photon buffer
    - Dirty CUDA Interop Buffers
  - FIX: Using BUFFER_COPY_ON_DIRTY for photon buffer and manually marking dirty
  - Maybe Use Separate INPUT_ONLY SEED BUFFER ?
  - TODO: Measure multievent compute speed using INPUT_OUTPUT seeded photon buffer vs INPUT only seed buffer
- OptiX Changing Event Buffer
  - Objective
  - Observation : trying to prelaunch in init fails
    - Context validation fails without evt buffers
  - Changing Event Buffers ?
  - Changing OpenGL Buffers
    - glBufferData
  - oglrap- Scene::uploadEvent
- NEXT : G4 Optical Step Collection
  - Objective
  - Stages
  - Review old collection with G4DAEChroma
  - Approach to reviving optical step collection
  - DONE : Near Standard G4 Scintillation/Cerenkov Step Collection
  - TODO: details of scintillation generation, compare Opticks vs G4 generated distrib
- Opticks Engineering
- Material Properties
  - [WORKED AROUND] Issue : old GDML export omits material properties
- Broken Indexing
- Broken PMT Test
  - FIXED
  - Issue : photon record positional qwns all zero
- G4GUN Debug
  - Integration starting point : pure g4gun
  - Evt debug with npy-/g4gun.py
    - domains
  - Opticks Space Domain
  - G4/GDML Space Domain
  - Geometry Selection
    - shape
- G4GUN Material Reporting
  - Approach
  - Fishy flags in history
- Taming Geant4 Verbosity
  - FIXED Issue : g4 geometry cleanup WARNINGs
  - FIXED Issue : g4 process verbosity control
  - Issue : g4 couples table noise, comment call to DumpCutValuesTable()
  - Issue : g4 init is slow, how to cache the physics tables ?
  - Issue : g4 Em noise control
  - Issue : g4 noise control
- [FIXED] GUI Photon Flag Names All NULL
  - progress
  - initial issue
- [FIXED] GUI Photon Selection Failure
  - FIXED
  - Background
  - Approach to solving
  - Not Working
  - Working
- High Level Refactor
  - Objective
  - Approach
  - DONE
  - Tests Commands To Run Whilst Refactoring
  - [FIXED] OP record vis broken by OpticksEvent simplifications
  - [FIXED] Left field flakiness
  - FIXED: Photon record coloring M key seems wrong
  - [FIXED] CFG4 load count mismatch assert
- Time Goes Backward
  - [FIXED] Issue : with GDML geometry opticalphoton time going backwards

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