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    SubD examples and models

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    • O Offline
      optimaforever
      last edited by

      @rich o brien said:

      The texture distortions aren't an issue for v2 of SUbD. It uses OpenSubDiv and it's even more awesome.

      Oho
      Is it even better than Catmull-Clark?

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      • JQLJ Offline
        JQL
        last edited by

        Damn Rich, you're playing with all the good tools!

        I've been playing with OpenSubDiv on Blender and I can't seem to find how to crease... I'm going to seach some tuts...

        www.casca.pt
        Visit us on facebook!

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        • Rich O BrienR Offline
          Rich O Brien Moderator
          last edited by

          Shift + E on selected edges to crease.

          Or hit N to bring up property panel. At the top you can see crease slider.

          Download the free D'oh Book for SketchUp πŸ“–

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          • C Offline
            cuttingedge
            last edited by

            @thomthom said:

            Indeed - one start seeing everything in quads. πŸ˜„

            to an extent it becomes an uncontrollable syndrome- seeing the world in wires... now in quads.. here's my finished earpod..

            my earpod

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            • garydornG Offline
              garydorn
              last edited by

              Howdy
              Please excuse my questions if its not suitable here.

              I've modelled up an AC aceca body - using SU 6 - native tools only , following CaljuCotcas how to model in a car in 3D using blueprints https://www.youtube.com/watch?v=Hgrix3m1l9k

              blueprint is from a 3Warehouse model called Aceca ( no model just blueprints.)

              Is SubD something that could be used to smooth out and simplify the surface better than what I've modelled so far. - some of my surfaces are still too dimply.

              Thanks - any advice appreciated.


              Ac aceca model SU 6 with stages in different layers


              photo off web


              l_ac-aceca-1955-.jpg


              screen shot of file

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              • utilerU Offline
                utiler
                last edited by

                Holy crap!!!!! Very impressed.....

                purpose/expression/purpose/....

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                • ely862meE Offline
                  ely862me
                  last edited by

                  @garydorn said:

                  Howdy

                  Is SubD something that could be used to smooth out and simplify the surface better than what I've modelled so far. - some of my surfaces are still too dimply.

                  Thanks - any advice appreciated.

                  In order for your mesh to smooth properly with SubD and even with Artisan, you need to make it a lot cleaner.
                  For SubD you need to make it like this .


                  Component_3 3.jpg


                  Component_3 2.jpg


                  Component_3 1.jpg

                  Elisei (sketchupper)


                  Before no life was done on Earth it was THE LIFE ITSELF...GOD
                  Come and See EliseiDesign

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                  • O Offline
                    optimaforever
                    last edited by

                    Ok... again a dumb question:
                    to get these topologies (Cut Face A and B), is there a specific tool or can I draw them the usual way with QFT line tool?


                    how to quadify a 5 sided corner

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                    • thomthomT Offline
                      thomthom
                      last edited by

                      @optimaforever said:

                      @rich o brien said:

                      The texture distortions aren't an issue for v2 of SUbD. It uses OpenSubDiv and it's even more awesome.

                      Oho
                      Is it even better than Catmull-Clark?

                      OpenSubdiv uses Catmull-Clack. But with more improvements than the variants I implemented myself. In the current version of SUbD the UVs are linearly interpolated. OpenSubdiv offer some more options - though I'm still exploring exactly what that means.

                      Thomas Thomassen β€” SketchUp Monkey & Coding addict
                      List of my plugins and link to the CookieWare fund

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                      • thomthomT Offline
                        thomthom
                        last edited by

                        @garydorn said:

                        Is SubD something that could be used to smooth out and simplify the surface better than what I've modelled so far. - some of my surfaces are still too dimply.

                        Car modelling has been my main interest for QFT and SUbD. You can see a test model in the beginning of this thread: http://sketchucation.com/forums/viewtopic.php?f=397%26amp;t=63826#p584865

                        That car you got there would be really fun to model. I've been thinking that I want to model a rounder car like that. (Was thinking Cobra is similar.)

                        Thomas Thomassen β€” SketchUp Monkey & Coding addict
                        List of my plugins and link to the CookieWare fund

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                        • R Offline
                          rv1974
                          last edited by

                          @unknownuser said:

                          OpenSubdiv uses Catmull-Clack. But with more improvements than the variants I implemented myself. In the current version of SUbD the UVs are linearly interpolated. OpenSubdiv offer some more options - though I'm still exploring exactly what that means.

                          Something in this fashion (at 10:17)
                          Are you going to grant us all those options mentoned below, or concentrate on one working the best?

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                          • JQLJ Offline
                            JQL
                            last edited by

                            @rich o brien said:

                            Shift + E on selected edges to crease.

                            Or hit N to bring up property panel. At the top you can see crease slider.

                            @Rich @Thomhom sorry to get a bit off topic, but neither OpenSubDiv nor the regular SubDiv in Blender seem to assume the crease.

                            Open subdiv doesn't allow to subdiv in edit mode so I can't interactivelly see how I'm creasing.

                            Of course I must be doing something wrong... That goes to show how Sketchup is intuitive for sketchup users, making all other software cumbersome to use, so again, congratulations on your work Thomthom.

                            There is still a big difference in SubD in Sketchup or SubD in Blender though, the control mesh UV stays within UV unwrap when you deform it, while in Sketchup I suspect it doesn't as deforming an edge or a face will make Sketchup assume it should extend the tiling:

                            I've shared this concern with other developers dealing with UV unwrap πŸ˜‰ but it makes sense sharing it here too:

                            Would it be possible to have this behaviour by default on a set of faces that are being used in your control mesh?

                            http://i.imgur.com/MuLG03A.gif

                            www.casca.pt
                            Visit us on facebook!

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                            • thomthomT Offline
                              thomthom
                              last edited by

                              @rv1974 said:

                              Something in this fashion (at 10:17)
                              Are you going to grant us all those options mentoned below, or concentrate on one working the best?

                              I'm working on exposing these options to the SUbD UI. I was thinking of trying to pick default values that makes sense most of the time - but make it easy to switch.

                              But need to work on the names. Like in that video the naming is weird. "Smooth (Always Sharp)" ... I mean, whut? Oxymoron descriptions that make no sense. And "Bilinear" - maybe it's just me, but I struggle to visualize what that really means - at least compared to "Smooth". So I need to figure out some better names. And I was thinking the UI would have some thumbnails to illustrate what goes on.

                              In the OSD docs there are some visualizations, but I'm still not quite happy with that style: http://graphics.pixar.com/opensubdiv/docs/subdivision_surfaces.html#face-varying-interpolation-rules

                              Thomas Thomassen β€” SketchUp Monkey & Coding addict
                              List of my plugins and link to the CookieWare fund

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                              • thomthomT Offline
                                thomthom
                                last edited by

                                @jql said:

                                Would it be possible to have this behaviour by default on a set of faces that are being used in your control mesh?

                                Nothing exist that allow UVs to be pinned like that. Though extensions can make sure to preserve UVs like that - Vertex Tools will for instance. And QFT have a save and reload feature - such that if you only distort the mesh with any tool that mess up UVs you can restore them to the vertices.

                                Thomas Thomassen β€” SketchUp Monkey & Coding addict
                                List of my plugins and link to the CookieWare fund

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                                • Rich O BrienR Offline
                                  Rich O Brien Moderator
                                  last edited by

                                  @jql said:

                                  @Rich @Thomhom sorry to get a bit off topic, but neither OpenSubDiv nor the regular SubDiv in Blender seem to assume the crease.

                                  Hmmm....sounds like PEBKAC

                                  Download the free D'oh Book for SketchUp πŸ“–

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                                  • R Offline
                                    rv1974
                                    last edited by

                                    General question:
                                    Would this plugin or any other have any benefits (speed, reliability etc.) being part SU core code (and not as add-on)?

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                                    • thomthomT Offline
                                      thomthom
                                      last edited by

                                      @rv1974 said:

                                      General question:
                                      Would this plugin or any other have any benefits (speed, reliability etc.) being part SU core code (and not as add-on)?

                                      This plugins would have a benefit to API access to the viewport pipeline - as then the subdivided mesh could be sent directly to the OpenGL pipeline instead of having to regenerate SketchUp faces. Then SU would know only about the control mesh and any tool could be used to manipulate the mesh while seeing the subdivided result.
                                      Though I have some ideas for that which might make it less of an issue.

                                      (I feel we should be having a separate thread for all of this and keep this thread about example models. Can a mod split out the recent posts?)

                                      Thomas Thomassen β€” SketchUp Monkey & Coding addict
                                      List of my plugins and link to the CookieWare fund

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                                      • JQLJ Offline
                                        JQL
                                        last edited by

                                        @rv1974 said:

                                        General question:
                                        Would this plugin or any other have any benefits (speed, reliability etc.) being part SU core code (and not as add-on)?

                                        As with all my questions with blender... I will get there eventually...

                                        www.casca.pt
                                        Visit us on facebook!

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                                        • HornOxxH Offline
                                          HornOxx
                                          last edited by

                                          How to cut Holes into a Sphere

                                          @pilou said:

                                          Maybe this ? πŸ˜‰

                                          thanks Pilou for your suggestion!

                                          @thomthom said:

                                          ...The quads around it seem to flow in line with the hole...

                                          thanks Thomthom for this bunch of possibilities!

                                          I tried a just slightly more complex form for the proxy which in deed provides a much better result.

                                          in this context, here are two interesting and well done videos which deal with this topic (they are Maya, but the principles are similar to SketchUp)
                                          https://www.youtube.com/watch?v=7qe2MWrXGHo
                                          https://www.youtube.com/watch?v=lvMfoH5Ikrc


                                          cutting holes in sphere Kopie.jpg


                                          examples 1 Proxy.skp

                                          never trust a skinny cook

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                                          • thomthomT Offline
                                            thomthom
                                            last edited by

                                            @hornoxx said:

                                            I tried a just slightly more complex form for the proxy which in deed provides a much better result.

                                            Thanks for the links! And thanks for sharing back your explorations.

                                            This model is very interesting. What I'm thinking - looking at this - is that it appear that one want the extra loops to lie on the continuation of the original spherical shape;

                                            2016-02-18_20h56_45.png

                                            So maybe one can start out with a half-sphere with more segments - then strip away the loops you don't need. (Only keeping the extra ones around the eyes.) Then it might be possible to avoid the mesh around the eyes distorting and turning flat.

                                            ....hmm.... I need to tinker with this one.

                                            Thomas Thomassen β€” SketchUp Monkey & Coding addict
                                            List of my plugins and link to the CookieWare fund

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