Constraining Diameter

[Ian Matthews]

I understand how to contrain lines to reference planes, but how is that done with circles? I can flex a cube in 3 dimensions, but I'm not sure how to flex the diameter of a cylinder.

[Chad Smith]

You can turn on the Center Mark Visible parameter to help you constrain to reference planes.
As for the diameter, it's a parameter that has been missing for years. I work around this by creating the circle as 2 semi-circles and constrain the ends of the semi-circles to reference planes around them. Essentially forming a box with the reference planes with the circle inside it.

[Ian Matthews]

Chad, thanks mate. I've been trying to get that done for some time. I'd seen some families that appeared to have boxes dimensioned to match the radius, but I never thought of using 2 semi circles.

And go the Tahs on Saturday. And the Socceroos at Suncorp...

[Chad Smith]

Sorry forgot one easier method. It's been a while since I've had to work with circles in families. :)

Dimension the radius of the circle and then assign a family type parameter to it. Then create another family type parameter called Diameter. Then in the formula field of the Radius parameter put in
=Diameter/2

[jlondenberg]

Depending on the shape you are aiming for, it may be easier to use a revolve. That way you are working on the rectangular section of the round geometry and can use rectangular dimensions/parameters.