Complex doors - Buttons

This tutorial will show the basics of  making
a button open a set of doors to get a treat.

Using  complex  door events are actually very easy
to create and in this lesson we'll be using a button
to  activate this  one.   Pictured  below I've allready
made  a  basic  room  with a box on one of the walls
using  the  glass  shader  to  display  a   BFG   inside.
On the  opposite  side  you  can see a button on the
wall  that  when  pushed,  will  open  a  set  of  doors
under  the  box  to  allow  our little goodie to fall out
and be made available to the player. If your a little
shaky on making doors you might want to read the
door   tutorial   here.   With  that   basic  knowledge 
under  your  belt   make  the  button   by   making  a 
simple  brush  on  the wall with a smaller brush on
top  that  will  act  as  the  button.   The  purpose for
making  a  brush  behind  your button is that when
the  button  is  depressed  by the player, the brush
will  not  exit  the  "hull"  of  your  map and cause it 
to  leak.   Now  to make you button brush an actual



   

"button" right-click on the 2-D window and select "func"
and then "func_button" with the button brush selected.
This   will  make  the   brush   blue  and  convert  it  into  a 
button  entity.   Now  going  back over  to the box  I've cut
a  hole  out  of  the  bottom  that  will  allow the size of the
BFG  to  fall  through.   I've  made  two door brushes to fill
this  gap  that  will  act  as  the  trap  doors that will open.
Once  again  select  the  door  brushes  one  by  one and 
right-click  on  the  2-D  window  and  select  "func"  and
then  "func_door".    Make  sure  that  the  brushes   that
surround  your  doors  are  able to absorb them to avoid
texture  flipping  and  overall funkitude.  Make sure that


    


the angle of your doors are set properly.  With the either 
of  the door brushes  selected  hit the "n"  key to bring up
the  entity  window  and  use  the  directional  keys  at the 
lower left to set the direction of the door.  Now to join the
button  to  our  doors simply select the button brush and
then  one  of  the  door  brushes  and hit "crtl+k" and you
should see a blue line going from the button to the door.
Now  repeat  the  process  to  include  the  other  door  so
that both will react when the button is pushed. That's it!