Developers of custom software and educational simulations.
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Kurtz-Fernhout Software Developers of custom software and educational simulations. |
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What are XYZ rotations?
Rotations in three dimensions are often spoken of in the terminology of
airplane flight -- roll, pitch and yaw. When PlantStudio draws a plant, the X, Y and Z rotations
of each plant stem combine to draw the stem in the right direction. If you
think of each plant stem as like the long axis of an airplane,
 X rotation is roll (clockwise or counterclockwise rotation);
Y rotation is pitch (up or down rotation); and
Z rotation is yaw (rotation to the left or right).
The rotation you set for a plant determines in what direction the plant is
rotated when it starts to draw (at the base of the plant). The same holds for
drawing 3D objects in the 3D object editor.
When you rotate a plant or 3D object in more than one dimension, the X, Y, and
Z rotations may combine in confusing ways. You will get a feeling for how to
rotate plants and 3D objects the way you want after you have tried the different
rotation directions for a while.
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Updated: March 10, 1999. Questions/comments on site to webmaster@kurtz-fernhout.com. Copyright © 1998, 1999 Paul D. Fernhout & Cynthia F. Kurtz. |