Best way to create Dynamic Block representing culvert

[neilyj666]

I want to create a dynamic block representing a culvert in plan but which is able to show various standard culvert "diameters". The red line represents a centreline and the blue lines are the plan representation of 2 specific diameters. I want to be able to show the blue lines at 0.60m, 0.75m, 1.2m, 1.5m etc.

I also want to be able to rotate about the mid point of the centreline as well as streching each end equally along the centreline

What is the best way to do this - I'm not very familiar with dynamic blocks apart from adding a Rotation and a Flip

Thanks

Neil

[ojuris]

try this

[neilyj666]

That's excellent - I now need to work out how you did it...!!!

[Libbya]

I would use a polar parameter instead of the separate stretch and rotate.

[neilyj666]

Thanks for this one as well - I'll look how you did it.

[neilyj666]

@Libbya and @ojuris I'm a bit lost as to how you got the different width parameters i.e. 600 750 1200 1500 etc into the block definitiion. I've been able to add new ones (300 and 1050) myself but I don't know how to set it up from scratch

Please can you advise me how this is done?

[Libbya]

Add a linear parameter.  Select the parameter and go to the properties palette.  Under Value Set go to Distance type.  Change it from None to List.  Use the Dist value List to add the appropriate values.

[neilyj666]

Got the distance sorted but now I can't work out how to get each side to move outwards and maintain the distance correctly

[Libbya]

Select the parameter and go to properties.  Change base type to Midpoint.  Add two stretch/move actions, one associated with each end of the parameter and stretching/moving the linework at that end of the parameter.  

[neilyj666]

Thanks for the quick response - it seems to be working for me at last....now to the Polar parameter...:)