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    Compound curves anyone?

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    • P Offline
      petropix
      last edited by

      compound curves.jpgHello All:

      I'm having difficulty creating the object shown in attached pic.

      In method one I drew the shape top view in 2D and used push-pull to create the two angular steps at the front. However, I need that front portion to taper, and tried a boolean subtract but that caused some surface geometry to disappear. Also, with method two I cannot angle the steps as show in method one.

      Any suggestions on how I might approach this type of construction?

      Thanks!

      t.

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      • TIGT Offline
        TIG Moderator
        last edited by

        You haven't explained the size of the object...

        I suspect it's actually quite small. πŸ˜•
        Sketchup can't cope with very tiny lines or facets [~0.5mm].
        If you scale up the object by x10 [or x100 or more]... then do the operations, and finally scale down again... the missing facets should be made and continue to exists after the object is reverted to its original size.
        Tiny edges and facets can't be created in situ, but they can 'exists'...

        TIG

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        • pbacotP Offline
          pbacot
          last edited by

          Your image is small. Hard to follow what you want.

          But part of the problem could be your MODEL is too small. Try scaling it up 100 -1000 times to perform the operations. Scale down after if needed. SU sometimes cannot generate really small faces, but in scaling down, it tends to keep faces that are already made.

          MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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          • pbacotP Offline
            pbacot
            last edited by

            And to paraphase that...

            TIG slipped in and beat me. I suppose he's NOT watching the Super Bowl either (do they even get it over there?)

            MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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            • TIGT Offline
              TIG Moderator
              last edited by

              "Super what"?
              In the UK we play 'football'...
              BBC's "Match of the Day" has just finished.
              We also have rugby union football and rugby league football...
              We invented these games but admit we are often no longer the best at them.
              In the USA you play something else, with a similar name, so you insist on calling real-football 'soccer' πŸ˜’

              TIG

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              • jeff hammondJ Offline
                jeff hammond
                last edited by

                @pbacot said:

                And to paraphase that...

                TIG slipped in and beat me. I suppose he's NOT watching the Super Bowl either (do they even get it over there?)

                haha.. wow.. i 100% honestly did not know the super bowl was today..

                jeezlouise i'm out of touch.. πŸ˜•

                dotdotdot

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                • P Offline
                  petropix
                  last edited by

                  Bingo! πŸ‘Š Very small indeed, 1.8 cm. It is in fact one of four anchor 'bits' that hold a watch strap. I suppose I should google that.. Many thanks!

                  t.

                  @tig said:

                  You haven't explained the size of the object...

                  I suspect it's actually quite small. πŸ˜•
                  Sketchup can't cope with very tiny lines or facets [~0.5mm].
                  If you scale up the object by x10 [or x100 or more]... then do the operations, and finally scale down again... the missing facets should be made and continue to exists after the object is reverted to its original size.
                  Tiny edges and facets can't be created in situ, but they can 'exists'...

                  1 Reply Last reply Reply Quote 0
                  • P Offline
                    petropix
                    last edited by

                    compounds 2.jpgOkay..hate to be a nag, especially on Sugar Bowl day..Scaling it up 100 x definitely helped. However, I'm still stuck on the 'angled step' detail. Please see pic. Need angle A at B. When I do a boolean subtract, the curved facets/faces/surfaces/geometry disappears. Damn tricky!

                    t.

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                    • P Offline
                      petropix
                      last edited by

                      Just as I posted this, I solved the problem πŸ˜’ made an an outline of the shape, duplicated, placed them slightly offset to create the skewed effect and used Curviloft to join them..Where there's a will..

                      t.

                      @petropix said:

                      [attachment=1:2fi3n3nh]<!-- ia1 -->compounds 2.jpg<!-- ia1 -->[/attachment:2fi3n3nh]Okay..hate to be a nag, especially on Sugar Bowl day..Scaling it up 100 x definitely helped. However, I'm still stuck on the 'angled step' detail. Please see pic. Need angle A at B. When I do a boolean subtract, the curved facets/faces/surfaces/geometry disappears. Damn tricky!

                      t.


                      compound curvi.jpg

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