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How to stretch a part of a model

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  • J Offline
    juju
    last edited by 26 Oct 2016, 06:41

    aaaah the courage to post your first post after more than 6 years of membership, still, you're super welcome!

    Your model would need to be halved and a component, symmetrically mirrored at the construction line point, with the linework at that point to be hidden.

    Then, when in the component bounding box, select everything you want to stretch and use the move tool.

    Save the Earth, it's the only planet with chocolate.

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    • D Offline
      Dave R
      last edited by 26 Oct 2016, 10:26

      You don't have to split the thing to do this, though. You can just select the edges and faces that need to move and use the Move tool.
      move.gif

      Alternatively, if you want everything to stretch, except the hole, select everything except the hole and the top and bottom faces. If you want stretch with the hole remaining centered, hold Ctrl (Option on Mac) while scaling.
      Screenshot - 10_26_2016 , 5_58_41 AM.png

      Etaoin Shrdlu

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      • J Offline
        juju
        last edited by 26 Oct 2016, 11:02

        @unknownuser said:

        The circle would look like a sausage and the model would be longer at the center section.

        DaveR, your method works, but doesn't take this into account.

        Save the Earth, it's the only planet with chocolate.

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        • D Offline
          Dave R
          last edited by 26 Oct 2016, 11:06

          I reread the OP's post and see he wants to end up with an oval instead of a circle. That can be done with my first method if the circle is positioned correctly and exploded.
          Screenshot - 10_26_2016 , 6_13_56 AM.png
          Screenshot - 10_26_2016 , 6_14_24 AM.png
          Screenshot - 10_26_2016 , 6_15_43 AM.png

          If needed, the edges of the oval hole can be welded with TIG-weld.

          Etaoin Shrdlu

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          • B Online
            Box
            last edited by 26 Oct 2016, 11:11

            I must admit that I read this earlier and didn't reply because I felt the OP wasn't clear. Did he want the sausage or not.

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            • D Offline
              Dave R
              last edited by 26 Oct 2016, 11:15

              Yes. I clearly misunderstood the first time, too.

              Etaoin Shrdlu

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              • B Online
                Box
                last edited by 26 Oct 2016, 11:41

                No Dave I wouldn't say you have misunderstood, I'd say the question is unclear until clarified by the OP.

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                • P Offline
                  pilou
                  last edited by 26 Oct 2016, 12:05

                  Seems the case to use the Fredo Scale ! 😄
                  Minute 3.00

                  Works also with wimple object! (no group or no component)
                  Right Click for Show Hide Divider (Stretch) icon N°5

                  Inside the Group Component
                  GIFetire2.gif


                  GIFetire1.gif

                  Frenchy Pilou
                  Is beautiful that please without concept!
                  My Little site :)

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                  • W Offline
                    williamp
                    last edited by 26 Oct 2016, 13:15

                    Yes I was unclear, thank you for the replies. I'm usually able to work out things on my own, after 6 years I'm stumped so thanks for the help. 😉

                    I want the sausage...

                    The Fredo scales appear to distort the circular ends, the ends should remain the same shape.

                    I was also hoping someone would clarify whether there was at one time a built-in tool (not a plug-in) to perform this task, perhaps in a much older version of SU. I am almost certain that there was a tool built in to SU that did this, perhaps they removed it.

                    When you have very complex models, its much more time consuming to select everything manually so that is why I was looking for the tool.

                    Thanks.

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                    • J Offline
                      juju
                      last edited by 26 Oct 2016, 15:04

                      I don't recall the "tool" you may have in mind, not as a standard installation anyway.

                      Save the Earth, it's the only planet with chocolate.

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                      • D Offline
                        Dave R
                        last edited by 26 Oct 2016, 17:22

                        @williamp said:

                        I want the sausage...

                        Sausage as in oval like I showed in my last screen shots, not ellipse?

                        The Fredo scales appear to distort the circular ends, the ends should remain the same shape.

                        @williamp said:

                        I was also hoping someone would clarify whether there was at one time a built-in tool (not a plug-in) to perform this task, perhaps in a much older version of SU. I am almost certain that there was a tool built in to SU that did this, perhaps they removed it.

                        No. No tools have been removed. What I showed in my screenshots was done with only native tools.

                        @williamp said:

                        When you have very complex models, its much more time consuming to select everything manually so that is why I was looking for the tool.

                        Thanks.

                        It can be tine consuming to do that with a complex model. If you can anticipate the need, you can make adjustments to the modeling work flow to make it easier.

                        Etaoin Shrdlu

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                        • H Offline
                          HornOxx
                          last edited by 26 Oct 2016, 17:53

                          Hi - an other option could be Tak2hata´s Stretch by Area plugin
                          http://sketchucation.com/pluginstore?pln=t2h_stretch_by_area

                          Thanks to all above for pointing out all these possibilities here.
                          Somehow I never unserstood, how Fredo´s scale tool (the one in the middle) is able to
                          stretch any outer shape but not this circle hole in the middle of it ❓ but it works
                          as shown in the video which Pilou has linked 😲 😳

                          So thanks again for all of your hints 😄


                          Stretch by Area.jpg

                          never trust a skinny cook

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                          • F Offline
                            fredo6
                            last edited by 26 Oct 2016, 18:38

                            @hornoxx said:

                            Somehow I never understood, how Fredo´s scale tool (the one in the middle) is able to
                            stretch any outer shape but not this circle hole in the middle of it ❓ but it works
                            as shown in the video which Pilou has linked 😲 😳

                            FredoScale::Stretch use a simple rule:

                            • Curves (i.e. Sketchup Curve) are never deformed
                            • So you just need to explode your circle curve to have it transform into a sausage.

                            The main reason is that when you stretch furniture and you have rivet holes, you dont want them to stretch.

                            FredoScale Stretch curve.gif

                            Fredo

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                            • H Offline
                              HornOxx
                              last edited by 26 Oct 2016, 18:44

                              Thank you Fredo ! These explanations are very helpful for me
                              Meanwhile I also understand that many tools have their own context options by right-clicking 😄

                              never trust a skinny cook

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                              • W Offline
                                williamp
                                last edited by 26 Oct 2016, 19:25

                                Thank you for the responses, Fredo6 was able to do it. Just needed to explode the curve as per the authors instructions above. Very nice little program.

                                Regards.


                                Stretch using Fredo6

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