topic Re: Vertical Offset from Surface Link - Subassembly Composer in Civil 3D Forum

Vertical Offset from Surface Link - Subassembly Composer

Gary.Barr — Fri, 02 Feb 2018 10:13:57 GMT

Hi all,

I'm having a similar issue at the moment but it's a step further along. I'm currently modelling a breakwater in SAC but the issue I'm having is trying to maintain an minimum offset of 1m above the existing ground. So even if the ground is undulating quite a lot there is always be a 1m minimum clearance above the highest point along the surface link below.

I can't quite figure out how to do this. I thought I could use the function "Line.MaxY+1" for the Y offset of the point but it is not giving the desired result. I have attached a picture of what I mean and hopefully it is more clear.

Please ignore the Line order notations...thanks.

Re: Vertical Offset from Surface Link - Subassembly Composer

schroederC3D — Fri, 02 Feb 2018 15:33:40 GMT

Good question! What about placing a link between the end of L2/L5, lets call it L20. Then spacing vertical links up/down along L20 at some interval (2-5m) to your target surface, and finding the MaxY of points placed at the link/target intersection. Then use this to set the L3 elevation (+1m)?

Re: Vertical Offset from Surface Link - Subassembly Composer

KMercier_C3D — Fri, 02 Feb 2018 17:49:52 GMT

After defining L9 as your surface link:

Make an AP1 point using Delta X and Delta Y from Origin with a Delta X of 0 and a Delta Y of L9.maxintercepty(0). This will give you the the y intercept at the origin of the elevation of a level (0%) line across the surface link.
Make another AP2 point using Delta X and Delta Y from AP1 with a Delta X of 0 and a Delta Y of +1 (your minimum clearance) ... [ALTERNATE: Make your auxiliary surface link before AP1 with a depth of -1 and then the maxintercept above will already take into account the minimum clearance]

The AP2 point is at the elevation of your L3 link.

Re: Vertical Offset from Surface Link - Subassembly Composer

Gary.Barr — Fri, 09 Feb 2018 11:12:34 GMT

Kati,

You're a legend! I've not tried it yet, but I'm 99% sure it's going to work after reading it.

Thank you very much!

Gary

Re: Vertical Offset from Surface Link - Subassembly Composer

josethiruvattal — Fri, 14 Jan 2022 09:54:43 GMT

Hi Gary,

Can you share this .pkt file for my reference.