Log of /trunk/geom/geom/inc/TGeoVoxelFinder.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: 7496 byte(s)
Diff to
previous 42982
Large scale cleanup in shapes navigation interfaces adding const modifier for point and direction parameters passed as input arguments.
Revision
42982 -
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Modified
Mon Feb 13 10:21:23 2012 UTC (2 years, 11 months ago) by
agheata
File length: 7454 byte(s)
Diff to
previous 41341
Added support structure TGeoStateInfo to communicate stateful navigation data internally. Fully removed locking from TGeoManager and TGeoVoxelFinder.
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41341 -
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Modified
Tue Oct 11 14:58:29 2011 UTC (3 years, 3 months ago) by
agheata
File length: 8743 byte(s)
Diff to
previous 41234
Adding thread id as parameter to methods of TGeoVoxelFinder to avoid passing through the serial TGeoManager::ThreadId. This recovers quite good the scalability with the number of threads
Revision
21497 -
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Modified
Wed Dec 19 16:28:00 2007 UTC (7 years, 1 month ago) by
brun
Original Path:
trunk/geom/inc/TGeoVoxelFinder.h
File length: 8299 byte(s)
Diff to
previous 20882
From Andrei:
Implement a custom TGeoVoxelFinder::Streamer to read the old versions of the class.
lso removed 3 obsolete voxels classes that were present in TGeoVoxelFinder.h/.cxx. Old geometry files with voxels should be readable now (tested) and produce consistent results. For me stressGeometry works.
Revision
19777 -
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Modified
Mon Sep 10 14:28:49 2007 UTC (7 years, 4 months ago) by
brun
Original Path:
trunk/geom/inc/TGeoVoxelFinder.h
File length: 13129 byte(s)
Diff to
previous 19610
From Andrei:
a diff with a new class TGeoUniformVoxels that is supposed to increase navigation speed. For the moment it does not - there is still some work to be done - so it is not yet used. The patch contains also a fix for the problem of visualization of daughters of composites.
Revision
15134 -
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Modified
Tue May 23 04:47:42 2006 UTC (8 years, 8 months ago) by
brun
Original Path:
trunk/geom/inc/TGeoVoxelFinder.h
File length: 10829 byte(s)
Diff to
previous 13373
From Federico Carminati:
"I have implemented all copy and equal operators needed to silence all
warnings in AliRoot, as requested. I have implemented shallow copies as
would do the default operators synthetized by the compiler.
Most operators are protected. If users complain, you just have to move
them into the public area, but class derivation is of course supported.
It has been a terrible job, I have modified 278 files, but the changes
are backward compabile, and this goes a long way to permitting user to
use the effc++ flag with root headers."
Revision
13373 -
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Modified
Mon Nov 28 12:55:35 2005 UTC (9 years, 1 month ago) by
brun
Original Path:
trunk/geom/inc/TGeoVoxelFinder.h
File length: 10591 byte(s)
Diff to
previous 13282
From Andrei:
some optimizations for creating physical nodes:
- re-voxelization no more done afer each Align() call - instead a signal is sent to
the existing voxels; the first navigation query to this voxel will rebuild it.
- volumes are aware if they were positioned more than once (replicated). If this is
not the case the volume is not cloned anymore for alignment.
Revision
12025 -
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Modified
Mon Jun 13 12:17:32 2005 UTC (9 years, 7 months ago) by
brun
Original Path:
trunk/geom/inc/TGeoVoxelFinder.h
File length: 10365 byte(s)
Diff to
previous 7952
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.
Revision
6144 -
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Modified
Tue Feb 18 15:37:36 2003 UTC (11 years, 11 months ago) by
brun
Original Path:
trunk/geom/inc/TGeoVoxelFinder.h
File length: 8330 byte(s)
Diff to
previous 5848
From Andrei;
TGeoManager :
- Safety() fully implemented using voxelization
- FindNextBoundary() modified in order to compute safety only when
needed (when a value MAXSTEP representing the physical step is given as
input).
TGeoBBox :
- correction for points exactly on box boundary for DistToIn()
TGeoVoxelFinder :
- fast check if distance to the voxel corresponding to a given node is
smaller than a input value - used in computing safety and distance to
next boundary;
TGeoChecker:
- CheckPoint() changed to use new Safety().
Revision
5406 -
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Modified
Tue Oct 8 16:17:49 2002 UTC (12 years, 3 months ago) by
brun
Original Path:
trunk/geom/inc/TGeoVoxelFinder.h
File length: 5687 byte(s)
Diff to
previous 5354
new version of the geometry package from Andrei:
- bug fix in the destructor of TGeoPatternCylPhi
- several modifications in the default constructors of shapes.
- several corrections and "v" feature added to I/O
- removed base class for finders
Now you can save voxels and retreive them with no problem. You can use :
gGeoManager->Export("filename", "", "v") to do that. The size of files
without/with voxelization are :
Exp no voxels saved voxels saved
ALICE 404227 719703
CMS 550440 1275590
ATLAS 1858198 3335166
Be careful, the files TGeoFinder.h and TGeoFinder.cxx have been removed.
Suggest doing:
rm geom/src/*.o geom/src/G__*
Revision
5354 -
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Modified
Fri Sep 27 16:16:06 2002 UTC (12 years, 3 months ago) by
brun
Original Path:
trunk/geom/inc/TGeoVoxelFinder.h
File length: 5207 byte(s)
Diff to
previous 4874
New version of the geometry package by Andrea & Mihaela Gheata
New features:
-I/O for all geometry classes. For example, to save/restore a geometry structure,
TFile f("mygeom.root","recreate");
gGeoManager->Write("mygeom");
and to read it back;
TFile f("mygeom.root");
f.Get("myGeom");
gGeoManager->CloseGeometry();
-Composite shapes fully implemented (no visualisation yet).
A composite shape is built out of basic shapes and transformations via
a simple formula mechanism, eg assuming a TGeoTube "tub1" and a TGeoMatrix "r1",
we can build a composite shape with:
TGeoCompositeShape *comp = new TGeoCompositeShape("comp",formula); where
char* formula="tub1+tub1:r1"
This will create the union of a tube with itself rotated.
The operators recognized by the geometry formula parser are "+","-","*"
for union, subtraction and intersection respectively. The colon ":" can be
used to specify a transformation for a given component.
-The voxelisation in cylindrical coordinates added as an optional optimisation
algorithm.
-Some bug fixes and several improvements in the tracking-related algorithms.
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