| Commit message (Collapse) | Author | Age |
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Replace all CVS header tags with the standard "$Header:$".
darcs-hash:20040918132147-891bb-dea889bdd94a479ec412d14d08e9efca63e5c24d.gz
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Import the recently announced changes:
1. Carpet has now an infrastructure for multiple maps (aka "grid
patches"). Instead of a single grid hierarchy there can now be
several. This is largely untested, because the remainder of Cactus
cannot handle multiple coordinate systems.
2. The order in which the schedule bins are called has changed. As Ian
Hawke pointed out, the previous order during time evolution was
inconsistent. The initial data ordering did not allow for recovering
and was not usable for progressively solving elliptic equations for
initial data.
3. Carpet now supports convergence levels. The convergence level
specifies by how many factors of two the resolution in the parameter
file should be coarsened (or refined, if negative). This should make
convergence tests and test runs much easier. It is, in principle, also
possible to run several convergence levels at once. This has not been
tested because the remainder of Cactus cannot handle multiple
resolutions. This will be necessary for a multigrid solver, and also
for having a shadow hierarchy to determine where to refine adaptively.
4. Carpet works together with the new CoordBase domain specification
parameters. Without these, using convergence levels will lead to very
strange results.
5. The "modes" have changed. There are now:
meta mode: the whole simulation
global mode: one convergence level
level mode: one refinement level
singlemap mode: one map on one refinement level
local mode: as previously
The whole mode handling has been cleaned up.
6. The regridding thorn has been cleaned up.
7. The kind of prolongation stencil is now determined in Carpet, i.e. at
a fairly hight level, instead of in CarpetLib.
8. The low-order prolongation operators have been made much more
efficient (as have previously the higher-order ones).
9. Assorted smaller changes.
For Carpet users, there should be no major incompatibilities. The major
improvements are 3 and 4 combined. Here is an example:
CoordBase::domainsize = extent
CoordBase::spacing = gridspacing
CoordBase::zero_origin_x = yes
CoordBase::zero_origin_y = yes
CoordBase::zero_origin_z = yes
CoordBase::xextent = 20.0
CoordBase::yextent = 20.0
CoordBase::zextent = 20.0
CoordBase::dx = 1.0
CoordBase::dy = 1.0
CoordBase::dz = 1.0
CoordBase::boundary_shiftout_x_lower = 1
CoordBase::boundary_shiftout_y_lower = 1
CoordBase::boundary_shiftout_z_lower = 1
Carpet::domain_from_coordbase = yes
Carpet::convergence_level = 0
grid::type = coordbase
grid::domain = octant
grid::avoid_origin = no
This gives you a grid that extends from the origin ("zero_origin") up to
20.0 with a grid spacing of 1.0. Symmetry zones and boundary zones are
added automatically. The "shiftout" says that there is no boundary
point on the origin. The staggering parameters (not shown) default to
"no". In order to change the resolution, only the convergence level
has to be adjusted. Note that the old way of specifying the domain
extent still works.
For Carpet developers, one major change is the new mode handling. As
described in 5, the looping macros (that loop over all refinement
levels, or all components) have changed.
darcs-hash:20040125135727-07bb3-51c9647c1b5080e7e180b52a1b81fa155cfd19e9.gz
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darcs-hash:20030810195845-07bb3-f96960adb07b21f8a202fcf673389c21aa516095.gz
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darcs-hash:20030810195309-07bb3-b72a129026bf8d159cfaafaf3ee0b78212596d7f.gz
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Removed the "dimgeneric_*" data types from CarpetLib. They were never
really used anyway.
Changed "th" into "th<D>".
Renamed "generic_*" to "g*".
Propagated these changes to all other places.
darcs-hash:20030103144936-07bb3-c4d74d2d94a56a898f9bb735666eefc01e2610e2.gz
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darcs-hash:20020925175408-07bb3-3a5085b3148aa5d51bcf34743cdc5b3b7f7eeb63.gz
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Changed the variable types for the time from int to real. This allows
more flexibility for time interpolation.
The time interpolators now accept an explicit argument for the current
time, instead of using the current time from the time hierarchy. This
allows arbitrary current times, which are necessary for the
intermediate time steps for time interpolators. The times that are
interpolated _from_ still come from the time hierarchy.
darcs-hash:20020925134915-07bb3-26927a425ca5c0b52a2ca02bc54673c4b9e1781e.gz
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Removed user choice of C++ template instantiation model. In my
experience, only one model works, namely explicit template
instantiaion. No need to pretend that the other things work with
Cactus.
(Don't complain to me -- I also think it's a shame that something that
calls itself "compiler" isn't able to do this automatically. Many
other compilers for many other languages do this kind of thing without
even mentioning it. So there's either something fundamentally wrong
with the C++ standard, or with the C++ compiler writers, or with the
perceived wishlists of C++ users. And I would bet an arm and a leg
that it's not the second of these.)
darcs-hash:20020505201656-07bb3-a1b8dfc5587d59c718ad25ce89d0c8973c2b3e6f.gz
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Changed handling of interpolation orders; they are now stored in the
grid functions and don't have to be passed around.
Speeded up some prolongation operators. They are still slow.
darcs-hash:20011209154308-07bb3-caa74a89a87c290852f2b59160ed26d9361f3cf1.gz
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Introduced abstraction classes that have no <dim> parameter. This
will make it easier to adapte the driver to support multiple
dimensions at once.
darcs-hash:20010612125655-07bb3-1cba35eb867eca1234b3a40bd7a5641b64776c50.gz
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Brought in latest differences from the SGI version. This is work
towards a code that compiles on both architectures.
darcs-hash:20010322174200-f6438-23ab5f26cf84d2666312791c6bdb5a0fc1d0390a.gz
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