I had gripes with this for years (and Solidworks never had this issue before I swapped), but finally caught it on camera. In my mind, a + should always default to creating a new body and - should cut into an adjacent one. I thought maybe it was just always following the Triad and axis directions, but clearly not today! Look where Z+ is on the top right corner and the direction of my extrusion.
so, what is the logic behind it?
Hi
Where did you create the sketch?
The +/- signs indicate the normal direction of the sketch plane.
Kacper Suchomski
This screenshot does not explain the definition of a sketch surface.
Kacper Suchomski
I can get the same if I sketch on the bottom of a body rather than on one of the document planes.
Mark Hughes
Owner, Hughes Tooling
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@HughesTooling wrote:
I can get the same if I sketch on the bottom of a body rather than on one of the document planes.
That's exactly right.
And it makes sense - the positive direction of the operation is the normal direction of the face on which the sketch is based.
Kacper Suchomski
For those unfamiliar with vector terminology:
https://en.wikipedia.org/wiki/Normal_(geometry)
Kacper Suchomski
