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    [Plugin][$] Curviloft 2.0a - 31 Mar 24 (Loft & Skinning)

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    • fredo6F Offline
      fredo6
      last edited by

      ABOUT A CONFLICT BETWEEN sunposition.rb and Curviloft
      There is a known problem which causes a crash of Sketchup when both Curviloft and sunposition.rb are installed.

      I am contacting Gabriel Miller on his site (he is the author of the sunposition script).

      In the mean time:

      • either take the attached modified version of sunposition
        version slightly modified by Fredo to avoid conflicts with other Ruby scripts
      • or comment out lines 45 to 50 (by putting a # in front of each line)

      Then both Curviloft and sunposition should work fine.

      Fredo

      PS: sunposition.rb overwrites and extends some Ruby built-in classes (precisely Float#round), which causes the problem. This may affect other scripts than just Curviloft.

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      • fredo6F Offline
        fredo6
        last edited by

        Just a precision on some issues mentioned in the previous posts. Curviloft may have problem to identify the right contours in PRE-SELECTION mode.
        However, you can always default to the MANUAL selection mode, where you have options to select curves only, or even the contours edge-by-edge.
        Tangent at vertex.gif

        Fredo

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        • jeff hammondJ Offline
          jeff hammond
          last edited by

          @unknownuser said:

          Just a precision on some issues mentioned in the previous posts. Curviloft may have problem to identify the right contours in PRE-SELECTION mode.
          However, you can always default to the MANUAL selection mode, where you have options to select curves only, or even the contours edge-by-edge.

          Fredo

          oh nice. thanks for clearing that up.
          i keep finding all these little options and i gotta admit, i'm very impressed..

          for one, the spline lofting is great.. at first, i was set on skinning and trying to form all of the encompassing curves but in many cases, it seems as if loft will actually make my life way easier.. especially once i started experimenting with the different spline methods.. namely, the two junction by orthogonal curve methods..

          i'm sure i'll have some questions soon about what's actually happening with those but for now, i'll continue experimenting with them.

          dotdotdot

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          • cmeedC Offline
            cmeed
            last edited by

            Thanks fredo6 for the latest update. letting you know that the Tent1.skp happily skinned on my mac
            cheers

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            • fredo6F Offline
              fredo6
              last edited by

              @unknownuser said:

              especially once i started experimenting with the different spline methods.. namely, the two junction by orthogonal curve methods..

              Jeff,

              Note that these two methods, by arc of ellipse and by arc of Bezier, are correct for straight junctions, but I still need to work out the case where you end up with an S-curve (I only implemented an approximate solution, due to lack of time).
              I am interested in your evaluation, because I added the methods just for trial, not being sure this corresponds to real situations.

              Fredo

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              • jeff hammondJ Offline
                jeff hammond
                last edited by

                @unknownuser said:

                Jeff,

                Note that these two methods, by arc of ellipse and by arc of Bezier, are correct for straight junctions, but I still need to work out the case where you end up with an S-curve (I only implemented an approximate solution, due to lack of time).
                I am interested in your evaluation, because I added the methods just for trial, not being sure this corresponds to real situations.

                Fredo

                here's a simple example.. i've added some notes to the skp showing things that aren't possible with other sketchup lofting/skinning plugins and i've only seen them in rhino.

                i'll compile a few other examples a little bit later that show some of the problems and other advantages i've seen..

                [edit - the lofted surface in the attached skp was formed using the two curves on the left side with the spline method set to ortho bezier]


                JH_curviloft1.skp

                dotdotdot

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                • fredo6F Offline
                  fredo6
                  last edited by

                  Jeff,

                  It seems the S-curves are working fine in your case (contours are in parallel planes).
                  The two methods are designed to ensure tangential continuity between contours, so that you can chain them in one block. Below is your model, slightly amended, where the whole shape is generated in one pass.

                  JH Curviloft1.gif

                  Fredo

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                  • Dave RD Offline
                    Dave R
                    last edited by

                    Fredo, just another thank you. The Skinning function turns out to be the perfect tool for sculpting seats such as this one for a Welsh stick chair.

                    http://farm5.static.flickr.com/4115/4921293579_b75e5519da_z.jpg

                    Thank you.

                    Etaoin Shrdlu

                    %

                    (THERE'S NO PLACE LIKE)

                    G28 X0.0 Y0.0 Z0.0

                    M30

                    %

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                    • mitcorbM Offline
                      mitcorb
                      last edited by

                      @Fredo6:
                      This tool may be in beta, but the couple of times I have used it show that it is very effective, and, once again I must salute you for your talent, and thank you for your generosity.
                      Humbly,
                      mitcorb

                      I take the slow, deliberate approach in my aimless wandering.

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                      • E Offline
                        Efrado
                        last edited by

                        FREDO you HIT IT AGAIN!
                        THANK YOU 😍 😍

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                        • fredo6F Offline
                          fredo6
                          last edited by

                          @dave r said:

                          Fredo, just another thank you. The Skinning function turns out to be the perfect tool for sculpting seats such as this one for a Welsh stick chair.

                          http://farm5.static.flickr.com/4115/4921293579_b75e5519da_z.jpg

                          Thank you.

                          Dave,

                          By chance, i found your video on YouTube explaining how to build the chair.
                          [url]http://www.youtube.com/watch?v=7UGgcMqMg0I]video[/url]

                          Fredo

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                          • Dave RD Offline
                            Dave R
                            last edited by

                            Fredo, that's not my video although the chair seat is the same one. The guy who did the video and I have been working with another fellow who is learning SketchUp by drawing one of his Welsh stick chairs. I used the same idea (we came up with independently) although I took it a little farther and refined the scoop out for the seat. Instead of a video, I described the process here.

                            Etaoin Shrdlu

                            %

                            (THERE'S NO PLACE LIKE)

                            G28 X0.0 Y0.0 Z0.0

                            M30

                            %

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                            • fredo6F Offline
                              fredo6
                              last edited by

                              Dave,

                              Oops!, I should have noticed the differences! I am not specialist of Welsh chairs definitely 😳
                              Anyway, an interesting use case of the tool.

                              Fredo

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                              • Dave RD Offline
                                Dave R
                                last edited by

                                No worries.

                                I've got a project in my mind that I'm thinking this plugin will make fairly easy to do. We'll see if I can pull it off.

                                Etaoin Shrdlu

                                %

                                (THERE'S NO PLACE LIKE)

                                G28 X0.0 Y0.0 Z0.0

                                M30

                                %

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                                • jeff hammondJ Offline
                                  jeff hammond
                                  last edited by

                                  i copy/pasted this quote by Fredo from his BezierSpline thread:
                                  http://forums.sketchucation.com/viewtopic.php?p=266254#p266254

                                  @unknownuser said:

                                  PS: on my long list of things to evolve is precisely a tool to draw splines with control of tangents.

                                  i'm assuming a lot of the things you've done with bezierspline are happening in curviloft as well? (and if i'm off the mark there, sorry for mixing the two discussions together)

                                  i guess my ultimate question is if you do in fact succeed with tangential control of spline could we also expect to see that type of feature in curviloft?

                                  i'll attach a skp which might get confusing as it's talking about two separate things at once 😄
                                  JH_curviloft2.skp

                                  part of that skp shows the kinking (that i'm sure you're already aware of) that can be cause by the S-curves and how i've dealt with them using the skinning function of curviloft.. (and actually, i've just realized that it's the creation of the single S-curves while lofting that i'm really liking about the loft.. i guess if these could be created on their own and tangential then they would be more than helpful enough to just use them and curviloft's skinning.. so yeah, bear with me, i'm not exactly sure what i'm asking here 😄.. i do know that it's those profiles and/or rails are the hardest thing to create no matter which skinning option i choose.. those outer lines of these types of blends are seldom a radius or ellipse which are really the only curves i can draw with any sort of ease in sketchup which will remain smooth and tangent. )

                                  the other note (at the bottom) shows areas that i'm still concerned with as far as continuity between the joining surfaces goes.. i haven't checked but just by the looks of it, i think the joint is a valley instead of smooth and continuos.

                                  are there any settings within the curviloft beta that may help smooth some of that out?

                                  dotdotdot

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                                  • H Offline
                                    hebeijianke
                                    last edited by

                                    THX for your great job
                                    I have a question
                                    What does this mean
                                    THX


                                    0.png

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                                    • fredo6F Offline
                                      fredo6
                                      last edited by

                                      @hebeijianke said:

                                      What does this mean (the two gray icons)
                                      THX

                                      The Spline methods Bspline and FSpline are only avilable when you have at least 3 contours.

                                      The idea is to take connect the first and last contours by a spline curve (BSpline or FSpline), taking the intermediary contours as guides only. So the shape won't exactly passes through these intermediary contours, but the general geometry would look smoother.

                                      I did not work deeply on these two methods, so they may not work well in certain cases.

                                      And for the wrong tooltip TTIP_SplineMethod_Cunic, that's just a bug. It is for Cubic Bezier junctions.

                                      Fredo

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                                      • H Offline
                                        hebeijianke
                                        last edited by

                                        THX
                                        This is just your typo
                                        Thank you for your answer


                                        0.png

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                                        • charly2008C Offline
                                          charly2008
                                          last edited by

                                          Hi,

                                          I love this curviloft.


                                          Armreif0.jpg


                                          Armreif1.jpg


                                          Armreif1.jpg

                                          He who makes no mistakes, makes nothing

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                                          • G Offline
                                            Gillman
                                            last edited by

                                            Thanks for putting together such a great tool. For the life of me, I couldn't generate a smooth curve to intergrate a jet engine intake into an aircraft fuselage. In a few seconds, your tool generated exactly the shape I wanted. I can't wait to experiment some more with it.

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