Subassembly Composer using expressions

[Anonymous]

Hi!

I am very new to this, so bear with me 🙂

I want to create a very simple subassembly with two lines. One horizontal line made of 3 points: P1, P2, P3. P2 is the center point and will follow an alignment. P1 and P3 are the start and end point and will target 2 not parallel polylines, i.e. the width of the corridor will vary.

I want then to create a second line, perpendicular to P2 and with a length proportional to the length of the first line (which is variable depending on the section). Is there a way to do this in the Subassembly Composer?

If not, what are my options?

Grateful for som help 🙂

Best regards,

Elisa

[KMercier_C3D · Accepted solution]

The point that follows the alignment is located at the "origin" in SAC. Typically this is the first point you define. For the purposes of being consistent with your terminology I renamed it P2. 

You will want to define two Target Parameters as Offsets in the lower right window. I named them LeftTarget and RightTarget but you can name them whatever meets your needs. 

Then P1 will be from P2 at a Slope and Delta X of 0% and -10 (or some default value for when there is no target defined) and then set the offset target to LeftTarget. (Add a link from point with the checkbox to make L1.)

Then P3 will be from P2 at a Slope and Delta X of 0% and 10 (or some default value for when there is no target defined) and then set the offset target to RightTarget. (Add a link from point with the checkbox to make L2.)

Then P4 will be from P2 at a Delta X and Delta Y and the Delta Y will be L1.length+L2.length.

Delete the .zip at the end of the attached file.

[Anonymous]

Thank you so much!

I thought i did try the .length command, but apparently not 🙂

[KMercier_C3D]

The last 4 pages of my AU2017 "Analyze and Devise in Subassembly Composer" handout is a great 'cheat sheet' of SAC expressions. 

https://www.autodesk.com/autodesk-university/class/Analyze-and-Devise-Subassembly-Composer-2017#hand...