Chains Program (Windows XP, Linux)
Tyler Streeter

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Directions:

Use the graphical user interface to add or remove items from the chain, change the shape of the chain links, and switch between solid and wireframe mode.

Drag the mouse across the graphical window to move the head link of the chain.  The left button moves it in the X and Y directions, the right button rotates it, and both buttons together moves it in the Z direction.

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Check out Open Dynamics Engine at opende.sourceforge.net