Moving Platforms and Trains


The  next  step  will  be to connect the starting point of
the  platform  to  the  destination.  Once  again  create
another  ' path_corner '  entity  but  this  time  place it
in  front  of  the  end  platform  on the other side.  Now
simply  select  the  original  platform  with   the  origin
brush  and  then  the first path corner.  Hit 'ctrl+k' and
you should see a brown line connect the two entities.
Deselect  and  then  select  the first path corner and 
then the second.  Once again hit 'crtl+k' and another
line will connect the two entities.  The last thing to do
will be to point that last path corner back toward the 
platform's start.  Just select the first path corner and
hit the 'n' key to bring up the entity menu.  Look at the
target  name  and  remember  it.  It's  probably  t2  or
something  like  that.  Deselect  and  now  select  the
path  corner on  the other  side and once again bring
up the entity menu.  Enter 'target' in the key field and
for  the  value  enter the target  name  from the  last
path  corner.   That's  it!!


   

This will make the platform to turn back from where
it  started  so it  can move  back and forth.  The other
keys  you  can  use  are  'speed'   with a default of 100
and  'wait'  that  uses  a  second  as  it's  value.   If  you
want   a   platform   to  pause   at  one  point  for  three
seconds  just  enter  3  as  the value for the 'wait' key.

    

You can make path corners till the cows come home.
They can go up, down, through doors, whatever your
little  heart  desires.  Just  remember to point the last
one back toward the path corner that came before it.
You  could  also  just  make  a  loop  or  a square  path.
Experiment and and see what happens in a test map.
If  the  platform  is  not  visible then you'll know your 
pathways are screwed up.   Good luck!