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                 *** Tempest's BUILD Tutorial ***
                    Lesson 4 : Star Trek doors		                   
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Purpose:
   A tutorial on making Star Trek doors in Duke Nukem 3D using Build.
   Note that a Star Trek door and a Split Star Trek door are two
   different kinds of doors. I'll explain Split Star Trek doors in
   a later lesson.

Step 1:
   Make a door opening. Choose some cool textures.

Step 2:
   Watch carefully at the map. I've added 3 vertices on each side of
   the door sector, and moved them inwards. Star Trek doors are
   actually made out of the side walls. Assign your door texture now
   before you close the door.

Step 3:
   Construct a vertical-split door by moving the vertices to their
   correct position. Easy, eh? You'll have to make sure that you don't
   accidently connect the two side walls together at their meeting 
   point.

Step 4:
   A Star Trek door needs a Lo-tag value of 9. Add a Speed sprite
   (#10) to determine the speed in which the door will open. Add
   a Music&SFX sprite (#5) for the door sound. You'll notice a bug
   in Duke Nukem 3D. The sound will be played twice. It doesn't
   sound quite right. It's odd that I haven't seen a Star Trek door 
   in the game itself.

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 Cho Yan Wong (aka Tempest)
 pwong@pobox.leidenuniv.nl
 http://www.wi.leidenuniv.nl/~cwong/myindex.html 
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