6.5.1 Elastic Cube
This example is the simplest possible. One cube is stretched in three
dimensions by using B-Spline curve.
1. Create one cube
2. Select the menu Create/Structure/Method and Create a stretch method.
3. Create a coordsys primitive under the method level so its origin
matches one corner of the cube and the axes match three edges of the cube.
4. Create a B-Spline curve under the method so it begins from the corner
of the cube opposite to the corner where the origin of the coordsys is.
Note: That you can draw a three dimensional curve by swapping the
orientation of your View window while outlining the curve.
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