Inventor API : How to find sketch fully constrained using VB.net

[umesh.mhaskar]

Hello Everyone,

                         While working with Inventor API sketches i am not geting right constrain status with below process:   

                       e.g. 1)  create new part

                              2)  create sketch1 and give required dimentions for fully constrained. now sketch1 is fully constrained , Extrude sketch1.

                              3)  create sketch2 with reference sketch1 face and use fix constrain option for fully constrained. now sketch2 is fully constrained. Extrude Skecth 2

                              4)  create sketch3 with with reference sketch1 face  and give required dimentions for fully constrained. now sketch3 is fully constrained.

                               When we finding above sketches constraining status using vb.net & inventor API its gives result for constrain status as below:

                Sketch1 = kFullyConstrainedConstraintStatus

                Sketch2 = kUnknownConstraintStatus 

                Sketch3 = kUnknownConstraintStatus

Problem: Sketch2 & Sketch3 is gives kUnknownConstraintStatus result insted of kFullyConstrainedConstraintStatus.

Then is any another option in APi to get extact constraining status.

Regards,

Umesh

[Maxim-CADman77]

I'd like to up this pretty old thread.
Have just faced impossibility to get true ConstraintStatus for Sketch named "Slice" in "Upper - Front.ipt" (Component of the Stapler legacy sample available at https://www.autodesk.com/support/technical/article/caas/tsarticles/ts/3gnm93P9sPAWE6vndk7fjq.html).

API of Autodesk Inventor 2024 (and 2023.2.1) returns 51716 (kUnknownConstraintStatus) while Inventor knows there 6 constraints needed if the sketch is opened for edit (so API should return kUnderConstrainedConstraintStatus).

PS:

Autodesk knows about this issue (https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/ConstraintStatus-f...) but issue is still actual.

[Curtis_Waguespack]

related link:

https://forums.autodesk.com/t5/inventor-ilogic-and-vb-net-forum/ilogic-underconstrained-sketches/m-p...

[Maxim-CADman77]

Thank you for sharing the link...

I believe marking that thread as solved was a mistake thus I prefer to keep discuss the issue here.

Some more related info:

Here is my simplest iLogic code to reproduce the issue on the sample .IPT I've mentioned in previous message:

Option Explicit On

Dim oPartDoc As PartDocument = ThisDoc.Document
Dim oPCD As ComponentDefinition = oPartDoc.ComponentDefinition
For Each oSk in oPCD.Sketches
	logger.info(oSk.Name & " - " & [Enum].GetName(GetType(ConstraintStatusEnum), oSk.ConstraintStatus))
Next

I would take this Issue for known-but-not-solved-yet-API-issue if Design Checker Add-In (with default settings) won't get things right.

 

From this picture you can see that Design Checker reports the "Slice" sketch "faulty" (UnderConstrained) while my iLogic code gets the Unknown ConstraintStatus value.

PS:

I kindly hope @MjDeck or @YuhanZhang will look at this and probably comment this somehow.

[YuhanZhang]

Hi @Maxim-CADman77 

The sketch "Slice" in the legacy data is a derived sketch, so it should be in fully constrained status, but in UI it still indicates it needs dimensions, so I logged this as INVGEN-68532. You can provide the number to query its status.