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how to specify vertex to pivot around?

image 2 : Why can't I draw an edge/line between these two vertices?

absolute_schmuck
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  • Hi schmuck, There is a distinction between a mesh and a curve. Related re spinning or screwing a profile https://blender.stackexchange.com/a/35485/15543 Object above is a curve, can have a closed curve (eg a circle) but cannot fork a curve. (ie at most a point is connected to two splines (spline being curve equivalent of mesh edge)) By trying to join the two curve control points in question, would need to fork at both ends.... hence the error. – batFINGER Aug 20 '21 at 05:37
  • https://blender.stackexchange.com/questions/24496/how-can-i-create-a-profile-and-rotate-it-to-create-a-mesh-using-blender-2-72 – batFINGER Aug 20 '21 at 05:43
  • @batfinger what do you mean. fork at both ends?

    Also why can I not spin the curve into a dome?

     – absolute_schmuck Aug 20 '21 at 09:24
  • Two questions above, have a look at answer to link posted re what the profile should look like https://blender.stackexchange.com/a/24498/15543 The other is re trying to join curve control points. A curve cannot go off in 3 or more directions from a control point. IMO opinion this is a different question, an perhaps should be asked instead as a New Question – batFINGER Aug 20 '21 at 09:36

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