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1 Tutorials LightWave 3D Motion Designer - Basics em Qua Jan 26, 2011 2:13 am


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Getting Started with Motion Designer in LightWave® 6.5
Load an object, tell it that it's made of cloth,
add some wind and hit Start. That's about how
easy it is to get moving with the soft body dynamics
system in LightWave® 6.5.
To learn the basics of Motion Designer 2000
we're going to create a spinnaker sail like the
one seen below:

875k mpeg

  1. To start, download and extract the Motion
    Designer Basics v1
    content packet at
    the top of this tutorial. Point your content
    directory to it and Load the Sail.lwo object.
  2. Open the Motion Designer control panel:
    MD_Controller. It's located in the Extras -> Plug-in
    panel -> Generics Pop-up.
    It looks a lot different than the previous
    versions of Motion Designer, but all of the
    functionality is still there plus more.

    Tip: If you're going to be using
    Motion Designer regularly you may want to
    edit your menu layout and place it somewhere
    on the main interface for easy access. You
    could even create a new Dynamics Tab and
    place the Particle FX and Motion Designer
    controls onto it.
  1. Before we can start the simulation, we need
    to enable the object and define the material
    properties of the sail. Click on the Property button,
    select the Sail object in the pop-up
    and click on the Activate button. This
    enables the object to take part in the simulation.
    Now we need to tell Motion Designer whether
    the sail is a Target object or a Collision
    object. It's a Target object, so click on the Target field
    and then click in the empty column to the right
    of it. You should see the Target field change
    to ON. (A quick shortcut for this is
    to double click on the Target field.)

  1. To define what material the sail is made
    of, click on the Surface Tab and expand
    the surface list by clicking on the Sail entry.
    This object has two surfaces, Sail and Sail.Fixed.
    Click on the Sail surface and choose cotton
    from the preset material pop-up
    at the bottom of the panel. This tells Motion
    Designer that you want the main Sail surface
    to behave as though it were made out of a thin
    cotton. (It's not the real material that most
    spinnakers are made of, but it will work for
    this tutorial.) Now select the Sail.Fixed surface
    and set the Fixed field to ON.
    If you load the object into the Modeler and
    select the Sail.Fixed polygons you'll
    notice that these are the corners of the sail.
    By fixing these polygons it prevents the entire
    sail from blowing away during the simulation.

  1. Next we need to create the environment
    properties that will affect the sail. Click
    on the Environment Tab and enter the
    values to match the image below. The columns
    represent the x,y,z values for each of the
    environment properties, i.e. There is a -1
    m/s^2 Gravity on the y axis, a -4 m/s Wind
    on the z axis

  1. Before we start the simulation, set the Preview
    Last Frame
    in Layout to 300 frames. This
    will gives us plenty of time to see the results
    of the simulation. Now click the Start button
    and watch as Motion Designer calculates the
    simulation. After it's finished, press Play
    in Layout and watch the animation playback
    in real-time.
  2. To save the simulation, click the Save button
    on the Motion Designer panel and give the Motion
    Designer Deformation (.mdd) file a name like md_sail.mdd.
    Now save the scene. The next time you load
    the scene, the .mdd file will be automatically
    attached to the sail.

Since the simulation takes
place directly in Layout, you can easily experiment
with different material and environment settings
to see how the sail reacts. Also you can animate
the sail object before you begin the simulation.
Set a few keyframes, lower the wind value and
hit Start. The sail will now react to the keyframed
motion as well as the environment.

Be sure to check out the manual
to learn more about the different attributes
in the MD_Controller panel that weren't covered
in this tutorial.

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