I added a boss to one side of this part.
I want to mirror that boss on the opposite side.
The Partial preview shows what is expected.
But the actual mirror is wrong.
I am assuming it is due to the way the feature was created.
I added a boss to one side of this part.
I want to mirror that boss on the opposite side.
The Partial preview shows what is expected.
But the actual mirror is wrong.
I am assuming it is due to the way the feature was created.
Up To Surface is tough with mirrors because it tries to actually mirror how the feature was built, meaning it tries to terminate the feature on your same surface. That's why (not using geometry pattern) it sorta goes in the wrong direction. It starts from the right point, but it still terminates on the same face because it's trying to really mirror the "recipe" for the mirror, but can't actually pick the opposite face.
Partial preview shows what you want, but only because it's doing a quick-and-dirty visual representation "guess" of throwing temporary surfaces up there that geometrically mirror the faces belonging to the feature.
Typically in this situation, you'd use "geometry pattern". This would work if your feature didnt' terminate in an existing face, which ends up creating a "modified" face. If (just for this purpose) you change your extrude to offset from surface (either by going past the existing surface or stopping short of it), you'll be able to use the geometry pattern. Un-checking geometry pattern still won't work though.
So yeah, unfortunately you'll have to figure out a way to modify your modeling method here. I assume you have no difficulty with getting the thing modeled, you're just trying to understand why this feature doesn't work...
Up To Surface is tough with mirrors because it tries to actually mirror how the feature was built, meaning it tries to terminate the feature on your same surface. That's why (not using geometry pattern) it sorta goes in the wrong direction. It starts from the right point, but it still terminates on the same face because it's trying to really mirror the "recipe" for the mirror, but can't actually pick the opposite face.
Partial preview shows what you want, but only because it's doing a quick-and-dirty visual representation "guess" of throwing temporary surfaces up there that geometrically mirror the faces belonging to the feature.
Typically in this situation, you'd use "geometry pattern". This would work if your feature didnt' terminate in an existing face, which ends up creating a "modified" face. If (just for this purpose) you change your extrude to offset from surface (either by going past the existing surface or stopping short of it), you'll be able to use the geometry pattern. Un-checking geometry pattern still won't work though.
So yeah, unfortunately you'll have to figure out a way to modify your modeling method here. I assume you have no difficulty with getting the thing modeled, you're just trying to understand why this feature doesn't work...