opBoolean INTERSECT returning INVALID_INPUT when passed qUnion

adamohern

            var to_intersect = qUnion([
                            qCreatedBy(id + "extrude1", EntityType.BODY),
                            qNthElement(qCreatedBy(id + "splitPart1"), 1)
                        ]);
                        
            // opDeleteBodies(context, id + "deleteBodies1", {
            //         "entities" : to_intersect
            // });
                    
            opBoolean(context, id + "tenon", {
                    "tools" : to_intersect,
                    "operationType" : BooleanOperationType.INTERSECTION
            });

// Result:
// @opBoolean: INVALID_INPUT

I'm trying to intersect two bodies: an extrude, and the result of an opSplitPart().

To insure that my qUnion is working, I inserted the opDeleteBodies() code. It works as expected: the two bodies are deleted. Why would opBoolean not want to accept the query?

adamohern

Ah, I see. Bodies are  not "created" by the split operation, they are "split" by it. So instead of qCreatedBy(), I needed to use qSplitBy(). Problem solved.

kevin_o_toole_1

Yep, qSplitBy is the right tool for the job.

To be pedantic: New bodies *are* created by a split operation. I think you would have succeeded if you had specified EntityType.BODY in your qCreatedBy (otherwise you would pick up the newly created edges and faces as well). The advantage of qSplitBy is just that you can robustly specify which of the newly created bodies you want, based on their position w/r/t the normal of your split entity.

For debugging the contents of Queries, I love using the debug function, since it tells me how many of each EntityType I've got and highlights the query contents in red when I have the feature open.