Making a Pendulum

This entity is easy as pie to bust out.  Allthough
it's hardly used at all in the game it could still be 
a cool element in your map.

This  entity  requires  something  to swing back and forth
so  start  out  by  making  an  axe,  morning star,  whacking
stick   or  whatever.   Remember  that each brush or patch
has to be touching the other and the enity seems to work
better  when  the  brushes  overlap by at least a couple of 
units.   Try  not to make the object too complex if possible.
I've chosen the "Claw Hammer of Woe"  for  the job.

   

Once your weapon of choice has been created and placed
where  the spankin'  will  commence,  go  ahead and  add a
small  brush at  the point where the object will swing from.
You'll need to cover this new brush with the 'origin' texture
from the 'common' folder.  Now simply select the brushes
that  make  up  your  weapon  including  the 'origin'  brush.
Right-click on the 2D window and select 'func_pendulum'.
When you deselect your new creation you'll notice that it
is now outlined in blue in the 2D window.  


 

Then there  are  two main keys that you'll have to use in the 
entity   menu.  Speed   which  has  a default  value  of 30 and
Dmg  which  is the equivalent  of health  points  so  do  what
you  wish. Make  sure that the swinging object does not exit
your bounding box as this might cause some nasty results.
 Use the angle keys in the entity menu to choose which
way the object will swing. 90, 180, ect.