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    Creating Arcs: Interesting Problem, why?

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    • D Offline
      designer7777
      last edited by

      I'm creating a few arcs, as will be shown in the example pic, with this code:

      c1 = Pt(0) 'cen
      r1 = Pt(1) 'rad
      sa = Pt(2) 
      ea = Pt(3)
      
      
      wshShell.SendKeys "centerpoint = Geom;;Point3d.new" & "{(}" & c1 & "{)}" & vbCr
      wshShell.SendKeys "vector = Geom;;Vector3d.new 0,0,1" & vbCr
      wshShell.SendKeys "vector2 = Geom;;Vector3d.new 1,0,0" & vbCr
      
      wshShell.SendKeys "vector3 = vector.normalize!" & vbCr
      wshShell.SendKeys "model = Sketchup.active_model" & vbCr
      wshShell.SendKeys "entities = model.active_entities" & vbCr
      wshShell.SendKeys "edges = entities.add_arc " & "centerpoint," & "vector2, vector3," & r1 & "," & sa & "," & ea & vbCr
      

      (That code runs through 4 arcs in an array, pt changing per entity to be created.)

      The oddity is, a certain arc wants to reverse the orientation, all driven from the same code, all in the same overall loop of points. Just

      one arc does this, all the time. Same problem if I reverse the sa and ea.

      http://s20.postimg.org/rqcatc2zh/SU_ARC_Q.jpg

      Any idea why this is happening?

      Thanks

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      • D Offline
        driven
        last edited by

        does it work if just use ruby?

        john

        learn from the mistakes of others, you may not live long enough to make them all yourself...

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        • sdmitchS Offline
          sdmitch
          last edited by

          sa and ea should be angles not points in the .add_arc arguments.

          calculate the arc normal

          vector3=c1.vector_to(sa)*c1.vector_to(ea)
          

          Nothing is worthless, it can always be used as a bad example.

          http://sdmitch.blogspot.com/

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