If a view can be oriented only using information from the base view then your section tools could be adapted to go a similar way. I think a proper auxiliary view tool is the key to any other non primary view. The most likely one will automatically be selected and shown in bold in the list. Depending on the selected reference, there may be one or more attachment modes available in the the list. the confusion starts when we change things up a bit. Select a first reference in the 3D view to filter the available attachment modes. Pictured below we see a Sketch, its Pad the Sketch Origin ( Red,Green) and the Body Origin (Blue) If you notice the Sketch, the Pad and and Both origins are all coincident. By default the sketch origin is coincident with the Body origin.
#Freecad offset geometry how to
I think I fail again to properly express my thoughts, but maybe Wikipedia can help: The paragraph about how to find the best direction to view and the related example Finding the shortest connector between two given skew lines PR and SU describes the manual workflow and it should give a hint how to place local coordinate systems to simulate this workflow in TechDraw = using auxiliary views. In Part Design all sketches are contained within a body. In other words: The angle between section line and page's horizontal axis is the same as between the local X axis of the section view and page's horizontal axis. The (first) section line in the base view defines the X axis, the arrow indicates the Y direction, and the Z direction of this view gives the Y direction of the section view as the section view is flipped over the X axis by 90°. AttachmentOffset: Same as 'Attachment' constraint, but maintaining the current relative placement of the involved parts by applying an element offset. This constraint completely fixes the parts relative to each other.
If we had a localCS that could be rotated properly then it is again only a calculation in XY (or XZ). Attachment: Add an 'Attachment' constraint to attach two parts with the selected geometry elements. Easy to calculate in XY, not so easy in arbitrary orientations.
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