Dynamic Block with Action Parameter and Constraint Parameters

[CNinBC]

I would like to create a pavement marking block with scalable symbol in the middle with a fixed width circle around the symbol as shown below. Ideally, I wish using the "rad1" constraint parameter grip to change the size of the block, scale the symbol in the center (which is the "A" as an example), while maintaining the width of the circle to be 0.1m.

the issue is I couldn't find a way to associate the "rad1" to a scaling action or pass the value of "rad1" to the "Distance1" action parameter using the expression. is there a way to achieve the goal?

I also tried to use "Distance1" action parameter grip and pass the value of "Distance1" action parameter to "rad1", it didn't work as well. looks like these two type parameters do not talk to each other.

Thanks.

[Libbya]

Post the block. 

From the pic you posted and your description, it appears to be very easily done using only dynamic parameters/actions.  Is there some reason you are set on using constraints?

[j.palmeL29YX · Accepted solution]

You don't need constraints. 

Test the attached suggestion. 

[CNinBC]

Hi @Libbya, thanks for getting back to me. I couldn't figure out a way to scale the whole thing up and down while keeping the width of the circle at 100mm wide. any suggestions? Thanks.

[CNinBC]

wow, that's amazing, thanks @j.palmeL29YX .

[j.palmeL29YX]

Above I added an upgraded version. The result looks IMO better for small circles.

[j.palmeL29YX]

---

@CNinBC wrote:

I looks like these two type parameters do not talk to each other.

---

FYI: For future similar issues: It's correct - this way of solution will always be without success. 

[CNinBC]

Thanks @j.palmeL29YX, after analyzed your first solution, I used the similar solution on my block with the move parameter removed, the only difference is I used grip on the outside boundary of the circle.

Thanks again.