Picking or selecting order
Picking or selecting order
(OP)
When you are putting assembly constraints between two objects, does the order of selection matter?
Is a constraint between A and B exactly the same as the constraint between B and A?
Is there any criteria for selecting the first object?
Is a constraint between A and B exactly the same as the constraint between B and A?
Is there any criteria for selecting the first object?





RE: Picking or selecting order
indocti discant et ament meminisse periti
RE: Picking or selecting order
One observation is that the first object in an Offset Constraint 'pulls' the second object to it, as if the first object were fixed. Using a Fixed Component constraint on the second object does negate this.
RE: Picking or selecting order
indocti discant et ament meminisse periti
RE: Picking or selecting order
The result of this is that when creating constraints in 3D, you should pay attention to the results but the desired result can be achieved sometimes by changing the sign of the offset value (+20mm vs. -20mm). If you were making constraints via a macro, then the order of selection might be a key factor.
With some experimentation, paying attention to these points, you can figure it out.
Hope that helps clarify a little bit.
Mark