1 files changed, 6 insertions, 0 deletions
diff --git a/param.ccl b/param.ccl
index e20eeeb..8f62563 100644
--- a/param.ccl
+++ b/param.ccl
@@ -128,6 +128,12 @@ KEYWORD upwind_type "Type of upwinding used in evolving the ehfinder equations"
   "characteristic" :: "Use characteristic information"
 } "intrinsic"
 
+KEYWORD surface_direction "Should we track outward or inward moving surfaces"
+{
+  "outward" :: "Track outward moving surfaces. Use for event horizon finding."
+  "inward"  :: "Track inward moving surfaces."
+} "outward"
+
 BOOLEAN reparam_undo "Should re-parametrization be undone at pinch-off"
 {
 } "no"