Error in parameter type for addInstance

eric_ma454

Hi all,
I am currently trying to instantiate multiple copies of a part studio on an array of points. I currently have:

elbowTest::import
...

const instantiator = newInstantiator(id + "myId");

addInstance(instantiator, elbowTest::build);

However, I am getting an error stating "Call addInstance(Instantiator (box), function) does not match addInstance(..., PartStudioData)," even though the SLD states addInstance can have PartStudioData type. If anyone has any insight to the reason for this error, that would be very helpful.

Bonus Q: If I have an array of points, and I would like to instantiate elbowTest on all of those points, how would I do that?

Best,
Eric Ma
AguaClara AIDE

lana

@eric_ma454
You'll get more help if you publish a link to your public document. Please see https://forum.onshape.com/discussion/9107/forum-post-checklist

kevin_o_toole_1

The overloads for addInstance() include a 3-argument version using a BuildFunction (where the third argument is a map containing e.g. a transform or a part query), as well as 2- and 3-argument versions using PartStudioData (which comes from a reference parameter, not a direct import). The error is suggesting the 2-arg version using PartStudioData, but you actually want the 3-arg version using a BuildFunction.

So I imagine you want code something like this:

const points = evaluateQuery(selectedPoints);
for (var i = 0; i < size(points); i++)
{
    addInstance(instantiator, elbowTest::build, {
        "transform" : transform(points[i])
    });
}

Let me know if you have further questions!
– Kevin

eric_ma454

@kevin_o_toole_1
Thank you for your reply. I used the transform argument used in your example, but multiple errors formed, involving:

@evMateConnectorCoordSystem: MATECONNECTOR_QUERY_CSYS_FAILED
Typecheck canBeTransform failed (value.linear is Matrix)
throw EXTRUDE_NO_SELECTED_REGION
@opPattern: Map does not contain field 'linear'

I am confused how to fix this, as well as the nature of most of the errors.

The share button on my document is grayed out, and the document doesn't say it is public, so I'm not sure if this link works:
https://cad.onshape.com/documents/740e6a14f9b0e5df6b16a58a/w/ce74bd2e6b57ecc8bb2a6914/e/cc8ee7787055eb6be4328154

MBartlett21

Try "transform" : transform(evVertexPoint(context, {vertex:points[I]})  )