Editing CheckProximity

==ACS function==

''boolean'' '''CheckProximity'''(''int tid'', ''str classname'', ''fixed distance''[, ''limit''[, ''flags'']])

Counts the actors of type ''classname'' close to a tagged thing, returning TRUE if they're more (or less, depending on ''flags'') than a given ''limit''. It can also have the side effects (if ''flags'' set this way) to change a monster's target, among other things.

===Parameters===
*''tid'': [[TID]] of thing to check proximity of actors against. Only works for one tagged thing.
*''classname'': class of actors to look for near the tagged thing. Supports both [[EDF]] names and ZDoom compatibility names.
*''distance'': maximum distance (in fixed point) actors must be to tagged thing.
*''limit'': number of actors to compare against. Without any specific flags, this function will return true if number is >= ''limit''. Default: 1
*''flags'': various flags. Default: none. NOTE: anything available in "zdefs.acs" but not mentioned here is unimplemented. The flags are:
:*'''CPXF_ANCESTOR''' or 1: count actor if ''classname'' belongs to one of its thingtype ancestors (using the '''inherits''' or colon syntax in the [[EDF]] thingtype).
:*'''CPXF_LESSOREQUAL''' or 2: function returns true if number of nearby actors is <= ''limit''.
:*'''CPXF_NOZ''' or 4: do not calculate altitude difference between actors and tagged thing. By default, Z contributes to the distance.
:*'''CPXF_COUNTDEAD''' or 8: also count dead actors. By default they're skipped.
:*'''CPXF_DEADONLY''' or 16: only count dead actors.
:*'''CPXF_EXACT''' or 32: function returns true only if number of nearby actors is exactly ''limit''.
:*'''CPXF_SETTARGET''' or 64: add the side effect of changing tagged thing's "target" (monster's enemy or projectile's originator) to one of the encountered actors. Combine this with '''CPXF_FARTHEST''' or '''CPXF_SLOWEST''' to pick a well-defined target. Otherwise it will prefer an arbitrary (but not random) one.
:*'''CPXF_SETTRACER''' or 256: add the side effect of changing tagged thing's "tracer" (seeker missile destination or MBF friend leader) to one of the encountered actors. Combine with same flags as for '''CPXF_SETTARGET'''.
:*'''CPXF_FARTHEST''' or 512: if setting target or tracer, pick the farthest actor found in ''distance'' range.
:*'''CPXF_CLOSEST''' or 1024: if setting target or tracer, pick the closest actor found in ''distance'' range.
:*'''CPXF_CHECKSIGHT''' or 4096: only pick actors to which a line of sight from tagged thing exists.

===Return value===
TRUE if the conditions have been met.

===See also===
*[[CheckSight]]
*[[ACS functions]]

[[Category:ACS]]