Spherical Four Bar Plugin

[spring.f...@gmail.com]

A while ago I create a Spherical Four Bar Plugin and posted
information about it on SUWiki. That information is now out of date,
so I am updating it here.

Sph4bar automatically creates spherical four bar mechanisms from a set
of 7 parameters presented in a dialog box. The parameters control the
size and shape of the links, which in turn defines the motion of the
mechanism. The plugin then animates the mechanism through it's full
range of motion, automatically detecting kinematic lock up positions.
The user can control the speed of the animation, and have the view
orbits as the animation runs. The user can also attach a "virtual
scribe" to the coupler link of the mechanism, and trace coupler
curves.

There are several preset parameters for creating various classes of
mechanisms (drag-link, crank-rocker, etc), but the user can create any
combination of parameters to get different motion.

There is a Help menu item which gives usage instructions, and also has
a link to other information about four bar mechanisms.

You can get a copy of the plugin at : http://spring.freediver.googlepages.com/