AutoCAD Civil 3D

[#1]

So C3D has a couple of conditional subassemblies.  They test a condition and if it passed, the SA is allowed to continue.  If it fails, the SA stops and no SA's that follow are processed.  I can do this in VB.Net, but there doesn't seem to be a way (or I can't find the way) in the SAC.

Anyone have any tips on how/if this can be done?

My intended use is like the Conditional Cut and Fill, except my new SA checks the cut/fill height along the slope (Intended) to daylight instead of vertically from the insert point (Built-In).  I don't want anything drawn, like the built-in conditionals, I just want the test to pass or fail and allow the user to place SA's after this condition.

Thanks.

[#2]

Matt,

Check out the help WIKI in Subassembly Composer for how to do this. There is a section under "Common Workflows" on Adding Conditional Behavior to a Subassembly that shows how to do this. The key is the use of the Auxiliary points and links to make the tests. The SAC is far more powerful than the generic links are when it comes to conditionals.

There are also some example PKT files as part of the WIKI to help get you started.

Cheers,

Peter Funk

Autodesk, Inc.

[#3]

Thanks for the reply Peter, but I'm aware of that functionality. What I want is for my SA to behave exactly lilke the existing subs. I don't want this sub to draw anything. I want the user to place other subs after mine that will be drawn in a true condition but not in a flase condition.
If you can show me how to use the SAC to duplicate the conditionalcutfill, I will be able to modify it for my use.

I hope I've explained it well enough.

[#4]

A sub that can test along a slope has been on my personal wish list since the '06 version.  Hopefully this thread will lead to wish fulfillment

[#5]

Matt,

This can't be done with SAC right now because we don't have a way to stop processing of a branch. We are looking at ways that this could be done in the future.

Steve,

There are lots of things you could do with the SAC. If you share a picture of what you are thinking about I'd be glad to get you moving in the right direction. We've tried to make the tool so that anyone can make subassemblies to meet their specific needs.

Cheers,

Peter Funk

Autodesk, Inc.

[#6]

Steve, I've done this and it is very easy. In fact, I have one that I created a couple of years ago. Had you asked...

[#7]

Thanks Peter. That's the answer I was expecting; I just wanted confirmation that I wasn't missing something.

[#8]

Im waiting for "stop processing" events in the SAC too.

[#9]

Hello Steve

In an update to my AU2008, for my AU2009 presentation I had created a "ConditionalSlope" subassembly, although the goal for this subassembly was to utilize subassemblies for lot grading, it may work for you.

Unfortunately I have not updated the code for C3D2013.

I only stumbled onto this discussion because I was considering rewriting my paper to demonstrate how to create the subassembly using SAC , and thus eliminating the need for Vb.net skills.

Here is the link to my AU2009 presentation.

http://au.autodesk.com/?nd=class&session_id=5341

[#10]

Hi Malcolm,

Reading through your course materials, I don`t think that your sub would do what I want.  My scenario is similar to the one that Matt posted originally, where a sliver cut or fill situation results from a daylight slope that is near parallel to the existing ground.

Essentially what I need is a version of the ConditionalCutorFill sub which tests the height to a surface measured along a projected slope, rather than vertically up or down from the insertion point.

I believe that the behaviour of at least one of the OOTB daylight subs has been changed in recent versions of the software to act this way, but I really need a Conditional sub for complex scenarios.