Setting up a sketch on a cPlane Point Plane

graham_lock

HI,

I'm using cPlane to create a point plane, but I'm struggling to correctly setup a sketch on that plane?

My test document is:

https://cad.onshape.com/documents/d6dc9c54f70594748bdf83df/w/1285c1d3ecaad60b2edff729/e/66b5c01eb88b592b7ff3d36d

Any help appreciated.

Thank you.

Caden_Armstrong

It has changed the origin, but you've also put your sketch points through worldToPlane which will calculate where the point should be in the coordinate system based on the model coordinate system. No matter what plane origin you select they will always end up in the same location when you do that.

Plane coordinate system matters if you are calculating the shape of your sketch relative to something. If all of your sketch points are based on other points in the model and will put everything through worldToPlane, you don't need to.

Caden_Armstrong

You need to filter the qCreatedby to a type

qCreatedBy(id + "pointPlane") should be
qCreatedBy(id + "pointPlane", EntityType.FACE)

Otherwise that query is returning EVERYTHING that the feature made, and newSketch only takes in certain entity types.

Also, consider doing evPlane on the input, skipping cPlane, and doing newSketchOnPlane.
You'll probably need the plane definition at some point and this skips making a plane object.

graham_lock

Thank you, I've updated the document with your suggestions.

I've added code to transform the sketch origin to the selected vertex.

I guess I should set a custom coordinate system for the plane though? Do you have an example of how to do that?

graham_lock

graham_lock

I've tried

const p is Plane = plane(vertex, -Y_DIRECTION, X_DIRECTION);

but that doesn't appear to change the origin?

Caden_Armstrong

It has changed the origin, but you've also put your sketch points through worldToPlane which will calculate where the point should be in the coordinate system based on the model coordinate system. No matter what plane origin you select they will always end up in the same location when you do that.

Plane coordinate system matters if you are calculating the shape of your sketch relative to something. If all of your sketch points are based on other points in the model and will put everything through worldToPlane, you don't need to.

graham_lock

Fantastic, it works!

Thank you for your help.