The entities file in the xtux data directory describes the entity types found
in the game. The entities file is parsed by functions in the sourcecode file
src/common/entity_type.c.

An entity entry starts with the header of the entity name enclosed in square
brackets, ie "[FRED]". All following values until another entity name in square
brackets are used to fill in details about FRED.

Each entity needs information about how it acts on the server, ie it's health,
speed, height, width etc and also information on how it is drawn on the client.

	Value				Data Type			Description 
------------------------------------------------------------
 class					string				One of either GOODIE, BADDIE, 
											NEUTRAL, PROJECTILE or ITEM.
 health					integer				Starting (and maximum) health.
 width					integer				Width used for clipping on server.
 height					integer				similar to width
 speed					integer				Maximum speed of entity.
 accel					integer				Accelaration in pixels/frame
 weapon					STRING				Default weapon for entities and the
											weapon a projectile represents.
											Corresponds to a weapon listed in
											the "weapons" config file.
 draw_weapon			boolean (0/1)		Is current weapon drawn in client?
 bleeder				boolean				Entity bleeds when shot?
 sight					integer				Sight in pixels, used in AI.
 touchdamage			integer				Damage per second a BADDIE inflicts
											on a GOODIE.
 drip1					integer				Colour #1 entity "drips" on client.
 drip2					integer				Colour #2 entity "drips" on client.
 cliplevel				STRING				Cliplevel of entity on the map.
 ai						STRING				AI type.
 item_action			STRING				What the item does to a GOODIE that
											picks it up. See items file.
 item_value				integer				Amount item affects pick-upper.
 item_respawn_time		integer				Time in seconds to respawn in
											HOLYWAR deathmatch mode.
 item_weapon			STRING				Weapon that the item gives you
											if it is a type GIVEWEAPON.
 item_ammo_type			STRING				Ammunition type (amount =
											item_value) given if item action
											is GIVEAMMO.


Animation details
-----------------

Are listed as ENTITYMODE_value where ENTITYMODE is a mode, like DYING, ALIVE
etc. Each entity MUST have at least the ALIVE details.

..

#Details for animation of entity FRED mode ALIVE
alive_pixmap fred.xpm
alive_img_w 64
alive_img_h 64

..

possible values are:

 pixmap					STRING				Pixmap drawn of entity on client. 
 img_w					integer				Image width (pixels)
 img_h					integer				Image height
 dir					integer				Number of directions of the entity.
 frames					integer				Number of frames.
 order					integer (x4)		Order of frames
 framelen				integer				Frame length (microseconds)
 stationary_ani			boolean (0/1)		Animate while stationary?

Some values default to certain values, see the top of the file "entities" or
the source of src/common/entity_type.[ch]