Log of /trunk/geom/geom/inc/TGeoShapeAssembly.h
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48928 -
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Modified
Mon Mar 25 15:45:11 2013 UTC (22 months ago) by
agheata
File length: 3313 byte(s)
Diff to
previous 44507
Large scale cleanup in shapes navigation interfaces adding const modifier for point and direction parameters passed as input arguments.
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44507 -
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Modified
Mon Jun 4 12:30:41 2012 UTC (2 years, 7 months ago) by
axel
File length: 3265 byte(s)
Diff to
previous 42999
Remove
using namespace std;
from Riostream.h, which has huge consequences for all of ROOT.
Riostream.h is now a simple wrapper for fstream, iostream, iomanip for backward compatibility; Riosfwd.h simply wraps iosfwd.
Because of templates and their inline functions, Riostream.h needed to be included in headers, too (e.g. TParameter.h), which violated the assumption that Riostream.h is not exposing its using namespace std to headers.
ROOT now requires R__ANSISTREAM, R__SSTREAM, which does not change the set of supported compilers.
Without "using namespace std", several identifiers are now prefixed by std::; e.g. roofit/* source files now have a using namespace std to keep their coding style.
TFile::MakeProject() now generates "using namespace std" to convert the CINT-style class names into C++ ones.
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42999 -
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Modified
Tue Feb 14 13:42:55 2012 UTC (2 years, 11 months ago) by
agheata
File length: 3260 byte(s)
Diff to
previous 36632
Thread data is now pre-allocated when calling gGeoManager->SetMaxThreads(). This adds ~20MB for ALICE geometry per 100 threads, but avoids atomic allocations and thread locking. All run-time geometry locks removed. Thread id stored now using static thread__ allocator, faster and lock free for subsequent calls issued by the same thread.
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36632 -
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Modified
Fri Nov 12 15:57:07 2010 UTC (4 years, 2 months ago) by
agheata
File length: 3403 byte(s)
Diff to
previous 35047
Fixed dynamic computation of assembly bounding boxes during alignment. The bounding box needs to be valid at all times, still does not need to be recomputed if no node is added or misaligned
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35047 -
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Modified
Fri Aug 27 14:38:41 2010 UTC (4 years, 4 months ago) by
agheata
File length: 3358 byte(s)
Diff to
previous 22923
Bounding box for assemblies is now computed dynamically when needed instead of after every AddNode operation.
The patch reduces the number of calls to TGeoShapeAssembly::ComputeBBox from 4.8 million to 12700 (!) in ALICE and gains 40% speedup in initialization time (~30sec).
Thanks to Matevz for spotting this. Also added Matevz's code for improving access by index to PNEntries.
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18553 -
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Modified
Mon Apr 23 08:58:53 2007 UTC (7 years, 9 months ago) by
brun
Original Path:
trunk/geom/inc/TGeoShapeAssembly.h
File length: 3058 byte(s)
Diff to
previous 15672
From Andrei:
- new method TGeoShape::GetMeshNumbers() that allows getting the number of points, segments and polygons in the mesh of any shape - to be used by an upgrade of the overlap checker
- addition in the overlap checker to use the above info
- modifications in TGeoManager for improving performance for tracking geantinos with G4root interface
Revision
15672 -
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Modified
Mon Jul 3 16:10:46 2006 UTC (8 years, 6 months ago) by
brun
Original Path:
trunk/geom/inc/TGeoShapeAssembly.h
File length: 2969 byte(s)
Diff to
previous 13282
from Axel:
Change the signature of SavePrimitive from
void SavePrimitive(ofstream &out, Option_t *option);
to
void SavePrimitive(ostream &out, Option_t *option = "");
With this change one can do, eg
myhist.SavePrimitive(std::cout);
WARNING: do rm -f tree/src/*.o
Revision
12025 -
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Added
Mon Jun 13 12:17:32 2005 UTC (9 years, 7 months ago) by
brun
Original Path:
trunk/geom/inc/TGeoShapeAssembly.h
File length: 2913 byte(s)
From Andrei Gheata:
New developments related to assemblies. Assemblies were up to now just
a collection of nodes that could be handled together only during build
time(TGeoVolumeAssembly class).
When positioning an assembly as node in some container volume,
what happened was just that all components of the assembly were directly
put into this container (with the big disadvantage of creating a very
flat structure at the level ofthis container).
With the new implementation, an assembly volume has a shape
(TGeoShapeAssembly) that derives from TGeoShape and implements all
required navigation functionality. Practically, this behaves as the
union of all shapes positioned in the assembly, but it is not
represented as a composite shape and uses voxelization.
An assembly volume creates an hierarchical level and it geometrically
insulates the structure from the rest (as a normal volume). Physically,
a point that is INSIDE a TGeoShapeAssembly is always inside one of
the components, so a TGeoVolumeAssembly does not have a medium. Due to
the self containment of assemblies, they are very practical to use when
a container is hard to define due to possible overlaps during positioning.
For instance, it is very easy now to create honeycomb structures without
using the "MANY" (overlapping) feature that is quite expensive in
performance.
To create an assembly volume, one should:
TGeoVolume *vol = new TGeoVolumeAssembly(name);
vol->AddNode(vol1, 1, ...)
vol->AddNode(vol2, 1, ...)
....
The creation of the TGeoShapeAssembly for the assembly volume is
completely transparent to users. Its bounding box is recomputed after
the addition of a node. Users do not have to create TGeoShapeAssembly
themselves. One can even replace a container in his existing code
(if this needed to be positioned as overlapping) with an assembly, by
just replacing:
TGeoVolume *container = new TGeoVolume(name, shape, medium);
with:
TGeoVolume *container = new TGeoVolumeAssembly(name);
then replace:
some_mother_vol->AddNodeOverlap(container,1,...)
with:
some_mother_vol->AddNode(container,1,...)
One cam define assembly(assembly(assembly(...))) Usage of assemblies
does NOT imply any penalty in navigation performance in itself.
Assemblies can also be used to regroup existing flat structures of
nodes thus highly optimizing the performance.
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