constructPath returning error, need advise on correcting

darren_13

I have this line:

var upperQueries is Query = qUnion([sketchEntityQuery(id + "sketch1", EntityType.EDGE, "upperLEArc"),

                                                sketchEntityQuery(id + "sketch1", EntityType.EDGE, "UpperLE_Spline"),

                                                sketchEntityQuery(id + "sketch1", EntityType.EDGE, "UpperTE_Spline"),

                                                sketchEntityQuery(id + "sketch1", EntityType.EDGE, "upperTEArc")]);

pathMap.upperPath = constructPath(context, upperQueries);

where a path should be created, so I can evaluate points on the aerofoil to print for xfoil analysis.

the problem is I get this error returned:
'throw Edges do not form a continuous path.'

This is the debug of 'upperQueries':


What I think is happening is that one of the splines ends and begins the opposite way to how it would form a continuous path. My question is; does this matter? or do I, in fact, have end and beginning points that don't coincide? The reason I doubt the second is that the combination of upper and lower edges forms an enclosed sketch profile, this tells me they do coincide.

I imagined that if the line is continuous in terms of point to point, and regardless of edge draw direction the path would be able to piece together the path.

the project is here:
https://cad.onshape.com/documents/95877be3b17f49277e87a2c3/w/b503830fd20472014beb1221/e/fd18fc6a8649f47782fe61bb

under profile generator new. The line at fault is line 581.

Any advice and further information on constructPath would be appreciated.
Darren

NeilCooke

Is the first edge in your Query one of the end edges (i.e. not in the middle?). Not sure if that is the cause, but constructPath should fix spline direction (which is its primary purpose).

darren_13

Hi @NeilCooke, yes the first edge is the front element, so it goes front arc, then onto a front spline then a rear spline then finally onto a rear arc. Assuming draw direction doesn't matter they form a continuous line.

Jake_Rosenfeld

Hi @darren_13 ,

From your debug picture it looks like constructPath should work fine.  It shouldn't matter whether one of the end edges is the first in the Query.  I'll look into this for you sometime in the next couple days, sorry you're having trouble.

darren_13

Hi @Jake_Rosenfeld, thank you.

Jake_Rosenfeld

Hi Darren,

I think the line numbers have changed a bit from when you posted this, but I am seeing the `Edges do not form a continuous Path` error on like 595:

pathMap.lowerPath = constructPath(context, lowerQueries);

If I debug lowerQueries I can see the following:

The issue here is that:

sketchEntityQuery(id + "sketch1", EntityType.EDGE, "lowerLE_Spline")

resolves to nothing.  If you change it to "LowerLE_Spline" it resolves to the edge you want

Let me know if you need any additional help, or if this did not resolve your questions about constructPath!

darren_13

Hi @Jake_Rosenfeld, this does indeed look like the culprit, not sure how I missed that but many thanks for looking into this.

Much appreciated,
Darren