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From: [e-mail] (Ken VanBrocklin)
To: [e-mail] (Lightwave)
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Organization: Alliant Techsystems, Inc.
Date: Fri, 22 Sep 1995 12:22:19 -0700
Subject: RE:Sphere phun
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>Stan Shumlick wrote:
>Here is one that has me kinda stumped. I have a sphere that I need a line
>or tube to extrude over time around the curvature of my shpere. I have
>tried a simple morph from a small version of my tube to the finished
>version of my tube (which has the correct curvature). What I get is a
>tube that is curved that grows instead of extrudes.

 What you need to do is a combination morph and clip map. The clip map is
actually a animation of black to white (or vice versa depending wich
direction the object grows)for however many frames you want the tube to
grow.  Create the  clip map image sequence in lightwave.Just set the
background to black(should be there at default) make a rectangle in modeler
in the face view.Load it in LightWave, set the surface to white and 100%
luminosity, position it so it completly fills the screen. create a key for
the last frame af the anim. now move the object left or right depending on
which way you want the clipmap to move, and position it so it just leaves
the screen.Create a key at frame 0. This should give you a black to white
wipe across your screen, which is what wou want for the clipmap sequence.
You can render this out using limited region set to around 10 pixels(might
be less) high by 752 wide. Should take about 2 sec. a frame to render, kind
of fun to watch if your bored.
Back in Layout, take the tube objects you allready created for the morph.
Leave the tube morphed at 100% and apply the clip map to the tube object.
(not the morph target) This should give you the effect of the tube growing
over the time of the clipmap image sequence. You may have to fiddle with
start and stop locations of the clipmap box to get the sequence to time out
right, but it should work.
  Good luck.

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[e-mail] (Ken VanBrocklin) sent this message.
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