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* (+) Added the capability to specify grid offsets in derivative and dissipationkorobkin2008-04-28
| | | | | | | | operators, as set by boundary_shiftout* parameters of CoordBase. Only first-order centered derivative operators are affected. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@105 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Moved definitions of coefficients to a single module in order to only havediener2007-10-16
| | | | | | | | | | | them in one place. Added routines to return coefficients in all the missing cases. Also added routines to return 2 derivatives (only 2-1 and 4-2 so far). The routines calculating derivatives for whole grid functions have not been tested yet, so if you are using them, you will probably want to hold off on updating until I give the clear signal. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@85 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Check that the boundary regions (where the stencils need to beschnetter2006-10-05
| | | | | | | | | one-sided) do not overlap. Check the number of ghost zones. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@81 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Add new parameters derivatives_zero_y and derivatives_zero_z in order todiener2006-02-14
| | | | | | | | | | | | | | ecplictly setting any derivatives in the y- and/or z-direction to zero when simulating 1- or 2-D problems with a 3D code. This avoids issues with errors at roundoff level in the y- and z-directions. Should be used with care and together with the parameter check_grid_sizes to avoid complaints about too small grids in the y- and z-directions. Has only been tested in a few cases. If problems are caused by this commit, please report them immediately. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@59 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* First attempt at a summation by parts finite differencing thorn.diener2004-10-06
git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@2 f69c4107-0314-4c4f-9ad4-17e986b73f4a