GRHydro_InitData: add parameter to offset radial origin

r_code = r_KS - r0 with r0=1M by default. This avoids placing the
central singularity on the grid.

From: Roland Haas <roland.haas@physics.gatech.edu>

git-svn-id: http://svn.einsteintoolkit.org/cactus/EinsteinInitialData/GRHydro_InitData/trunk@196 ac85fae7-cede-4708-beff-ae01c7fa1c26

1 files changed, 5 insertions, 0 deletions

diff --git a/param.ccl b/param.ccl
index 51c4c9d..1eb8e46 100644
--- a/param.ccl
+++ b/param.ccl
@@ -381,6 +381,11 @@ CCTK_REAL bondi_bmag "B_0 parameter for magnetized Bondi"
   0:* :: "Anything positive"
 } 0.01
 
+CCTK_REAL bondi_radial_offset "redefine r_grid=r_KS-r0 to avoid singularity on grid"
+{
+  0:* :: "Any positive number"
+} 0.0
+
 CCTK_BOOLEAN set_bondi_beta_sonicpt "Set plasma beta parameter instead of bondi_bmag"
 {
 } no