I am new in this Forum
Compliments to all and BRAVI
One asked :
Why is it not possible to give an tangent constraint
betwen the circles and the verical edge of the Solid
to obtain an symmetrical animation betwen the corners constraint
tanks in advance
al

Hi Alberto,

Welcome to the forum and thank you for the interest to our solution.

I didn't catch which behavior you want to obtain. In the model you attached Tangency between circles and vertical edges can not
be introduced. Tangency implies that circle and line lie in the same plane and have only one common point, in your model they are perpendicular.

If you want a line and circle to have only one common point and don't want them to share the same plane: create this point and attach it to both
line and circle with 2 Coincidence constraints.

Hope this helps. Do not hesitate to ask more.

Alexey

Thanks for the clarification approximately the argument
relative to the tangent constraint
They are successful to obtain a symmetrical movement of the two lateral ribs
of the solid one varying the values of one of the angles
As you can see in the file attached
best
al

Alberto, in the model you attached "Parametrizzazione solido da est.polilinea.29-03-10.zip" did you try to select both Angles with Ctrl, do a right-click and select Animate from context menu? In this case ribs are animated symmetrically.

Also, please take a look on the model attached, I've added a line parallel to the middle plane. Now if you change the Angle ribs are moved symmetrically. If you don't want to see the line you can Hide it.

Alexey