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Barley Twist Spirals

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  • D Offline
    Dave R
    last edited by 30 Jan 2013, 19:41

    Peter, yes, you can get the intersect but there'll be no faces created, in this case, to terminate the twist geometry.

    Take a look at the example.

    In the foreground there are two components. I opened the cylinder for editing and performed Intersect Faces>With Model. The faces were intersected and edges were created at the intersection but notice there are no faces in the resulting notch.

    In the background, the box is in the same context as the cylinder. After intersection and deleting the waste, there are faces created in the notch.


    Intersect.skp

    Etaoin Shrdlu

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    • A Offline
      archturn
      last edited by 30 Jan 2013, 20:07

      @dave r said:

      Although you could make an intersection between the twist geometry and the other part of the turning with the other part outside the component (or group), You won't get the faces you need. So the other part of the turning should be in the same context, i.e. inside the component (or group) as the twist geometry.

      Ok Got this part

      @dave r said:

      The jagged edges are due to the intersection of two faceted surfaces and really can't be entirely eliminated. You can minimize them by having the same number of edges in both curves but that'll be difficult to manage in this case. If you were making the twist with each start a copy of a component, you would have an easier time with the intersection and less to deal with.

      Dave
      I think I do have the same number of edges - 24. Will try as you said with each twist a copy of a component

      @dave r said:

      I'm not understanding why you are using Zorro for any of this.

      Just to make it a bit easier to mange at the intersecting point

      @dave r said:

      The lines you're seeing are due to unsoftened geomtry. I don't know if it is something you are doing that results in the unsoftening or if you are doing something with a plugin that causes it. You can fix it by selecting the area, right clicking and choose Soften/Smooth. Or is it Smooth/Soften?

      Dave I tried the soften geometry to no avail. I've included a file with a sample part.

      test turning.skp

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      • D Offline
        Dave R
        last edited by 30 Jan 2013, 20:09

        Crossing posts but here's an example of the round end applied to the twist. Obviously I didn't bother with anything above the termination of the barley twist but there rest is pretty simple. This was done with the twist and a shallow dome in the same context.

        Pommel Twist.skp

        I'll take a look at your file as soon as I get a minute.


        twist pommel.png

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        • D Offline
          Dave R
          last edited by 30 Jan 2013, 20:14

          It worked for me. I selected all of the geometry, right clicked, chose Softe/Smooth Edges. I also corrected the face orientation.

          In my opinion you're using way more segments for your curves than are really needed. This will increase the likelihood of running into the tiny face issue. I think you could reduce that quite a lot without having any real noticeable loss of detail.


          test turning.skp

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          • A Offline
            archturn
            last edited by 30 Jan 2013, 20:25

            @dave r said:

            It worked for me. I selected all of the geometry, right clicked, chose Softe/Smooth Edges. I also corrected the face orientation.

            Wow
            Doesn't work for me. Can SU get tired? πŸ˜„

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            • D Offline
              Dave R
              last edited by 30 Jan 2013, 20:29

              I don't know. I've never worked it that hard. Did you try moving the slider a little?

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              • A Offline
                archturn
                last edited by 30 Jan 2013, 21:15

                @dave r said:

                I don't know. I've never worked it that hard. Did you try moving the slider a little?

                Slider??

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                • D Offline
                  Dave R
                  last edited by 30 Jan 2013, 21:23

                  slider.png

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                  • G Offline
                    gilles
                    last edited by 30 Jan 2013, 21:25

                    check this, and Dave is right, you don't need so much segments in your vertical curves.
                    You must consider the purpose of creating the model:

                    make a render
                    creating shape for produtcs
                    create a catalog of your products for architects....

                    Stay low poly as far as you can, go see to the gallery and you will see impressives models with low poly.

                    ho ho cross post πŸ˜„


                    soft.png

                    " c'est curieux chez les marins ce besoin de faire des phrases "

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                    • A Offline
                      archturn
                      last edited by 30 Jan 2013, 21:46

                      That did it
                      Thanks

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                      • P Offline
                        pbacot
                        last edited by 30 Jan 2013, 21:59

                        @dave r said:

                        Peter, yes, you can get the intersect but there'll be no faces created, in this case, to terminate the twist geometry.

                        Take a look at the example.

                        In the foreground there are two components. I opened the cylinder for editing and performed Intersect Faces>With Model. The faces were intersected and edges were created at the intersection but notice there are no faces in the resulting notch.

                        In the background, the box is in the same context as the cylinder. After intersection and deleting the waste, there are faces created in the notch.

                        That's clear Dave. But in this case the faces we want are already formed. By the intersection performed, we don't want faces formed, we just want to create cut along the intersection. Worked fine as in my example.

                        MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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                        • A Offline
                          archturn
                          last edited by 1 Feb 2013, 01:04

                          Ta Daaaaaa
                          I want to say a big thank you to all that helped. I think I finally got it. As it turned out the intersecting was the most difficult for me to get. With the screw plugin there is really not much to it doing the barley twist.
                          I hadn't learned about resizing to get larger faces before - big plus there. I had to read and re-read Dave and Peter and Gilles post to finally get the intersection part. Thanks all!!

                          Screen Shot 2013-01-31 at 6.55.51 PM.png

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                          • D Offline
                            Dave R
                            last edited by 1 Feb 2013, 02:58

                            Hey! That turned out nice. Good work.

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                            • P Offline
                              pbacot
                              last edited by 1 Feb 2013, 04:12

                              Yeah, that's a nice one! Thanks for starting this thread too!

                              MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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                              • G Offline
                                gilles
                                last edited by 1 Feb 2013, 10:45

                                @pbacot said:

                                Yeah, that's a nice one! Thanks for starting this thread too!

                                +1 πŸ‘

                                Good job, any chance you attach the model?
                                Just curiosity. πŸ˜‰

                                " c'est curieux chez les marins ce besoin de faire des phrases "

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                                • A Offline
                                  archturn
                                  last edited by 1 Feb 2013, 13:38

                                  @gilles said:

                                  Good job, any chance you attach the model?
                                  Just curiosity. πŸ˜‰

                                  Absolutely
                                  N112_2.skp

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                                  • D Offline
                                    Dave R
                                    last edited by 1 Feb 2013, 13:47

                                    Thanks for posting that. I see a few issues with it but I expect it'll work for your needs.

                                    There are some missing faces and some unneeded hidden edges.

                                    Etaoin Shrdlu

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                                    • A Offline
                                      archturn
                                      last edited by 1 Feb 2013, 13:55

                                      @dave r said:

                                      Thanks for posting that. I see a few issues with it but I expect it'll work for your needs.

                                      There are some missing faces and some unneeded hidden edges.

                                      I just spotted the missing faces and fixed them but what do you mean by unneeded hidden edges. How to avoid them? I scaled up 100 times. Makes me think I should have scaled up more?

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                                      • D Offline
                                        Dave R
                                        last edited by 1 Feb 2013, 14:16

                                        The unneeded edges I was referring to can be seen if you turn on Hidden Geometry (View menu)

                                        Also more missing faces at the bottom.
                                        unneeded.png
                                        unneeded2.png

                                        If you used components instead of groups you would reduce much of the work needed to draw this. That applies to other things, too.

                                        Etaoin Shrdlu

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                                        • A Offline
                                          archturn
                                          last edited by 1 Feb 2013, 14:25

                                          @dave r said:

                                          The unneeded edges I was referring to can be seen if you turn on Hidden Geometry (View menu)

                                          Also more missing faces at the bottom.
                                          [attachment=1:zqm4jyv1]<!-- ia1 -->unneeded.png<!-- ia1 -->[/attachment:zqm4jyv1]
                                          [attachment=0:zqm4jyv1]<!-- ia0 -->unneeded2.png<!-- ia0 -->[/attachment:zqm4jyv1]

                                          If you used components instead of groups you would reduce much of the work needed to draw this. That applies to other things, too.

                                          Are you saying that using groups instead of components is the reason for the unneeded edges?

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