# Interface definition for thorn AHFinderDirect
# $Header$

implements: AHFinderDirect
inherits: Grid ADMBase StaticConformal

################################################################################

#
# diagnostics computed by this thorn which other thorns may want to use,
# and/or which we may want to output with Cactus I/O methods
#
protected:

#
# all the remaining diagnostics are arrays subscripted by the
# (1-origin) horizon number  hn ; subscript 0 is unused
#
int BH_diagnostics__int TYPE=array DIM=1 SIZE=N_horizons+1 \
                        DISTRIB=constant TIMELEVELS=1
{
# this is a Boolean flag: 0=false, 1=true
AH_found	# was this AH found the last time we searched for it?
		# (if this thorn is active, we search at each time step)
} "CCTK_INT diagnostics calculated for each apparent horizon found"

#
# these diagnostics are only defined for those apparent horizons
# where  AH_found[hn]  is true
#
real BH_diagnostics__real TYPE=array DIM=1 SIZE=N_horizons+1 \
                          DISTRIB=constant TIMELEVELS=1
{
# FIXME: it would be nice to gather these together in some way
centroid_x, centroid_y, centroid_z	# centroid position

area		# area of apparent horizon
m_irreducible	# irreducible mass = sqrt(area/(16*pi))
} "CCTK_REAL diagnostics calculated for each apparent horizon found"