From f02015f1e601269b793e7030c4c083d7c3f7534b Mon Sep 17 00:00:00 2001
From: schnetter <schnetter@40f6ab95-0e4f-0410-8daa-ee8d7420be1d>
Date: Sun, 30 May 2004 09:05:31 +0000
Subject: Add new variable "sf_area" for the surfaces' proper area.

git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/SphericalSurface/trunk@11 40f6ab95-0e4f-0410-8daa-ee8d7420be1d
---
 interface.ccl | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/interface.ccl b/interface.ccl
index e49b5ad..e3cf6d8 100644
--- a/interface.ccl
+++ b/interface.ccl
@@ -14,6 +14,8 @@ CCTK_INT sf_valid[nsurfaces] TYPE=scalar
 
 CCTK_REAL sf_info[nsurfaces] TYPE=scalar
 {
+  # The following are coordinate-dependent quantities:
+  
   # monopole moment; M := sqrt(A / 4pi)   with A := int(S) r^2 dS
   sf_mean_radius
   sf_min_radius sf_max_radius
@@ -27,11 +29,18 @@ CCTK_REAL sf_info[nsurfaces] TYPE=scalar
 
   # bounding box
   sf_min_x sf_min_y sf_min_z sf_max_x sf_max_y sf_max_z
+  
+  
+  
+  # The following are covariant quantities:
+  
+  # area; A := int(S) sqrt(q) dS   with q_ij the 2-metric on the surface
+  sf_area
 } "Surface information"
 
 
 
-CCTK_REAL sf_radius[nsurfaces] TYPE=array DIM=2 SIZE=maxntheta,maxnphi DISTRIB=constant TAGS='convergence_power=1'
+CCTK_REAL sf_radius[nsurfaces] TYPE=array DIM=2 SIZE=maxntheta,maxnphi DISTRIB=constant #TAGS='convergence_power=1'
 
 CCTK_REAL sf_origin[nsurfaces] TYPE=scalar
 {
-- 
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