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    Terrain from contours - improve on native 'from contours'?

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    • utilerU Offline
      utiler
      last edited by

      Thanks Fredo, so if I triangulated points with your triangulate plugin then ran toposhaper I'd get this result!!!!???

      purpose/expression/purpose/....

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      • P Offline
        Panga
        last edited by

        Nice evolution Fredo, I'm still waiting for this magical tool !! Keep up the good work and I'll hit the donate button again !! πŸ˜‰

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        • fredo6F Offline
          fredo6
          last edited by

          Here is the terrain with a much higher definition 200 x 88, so around 35,000 triangles generated. Takes longer of course, but does not bring a lot more details compared with the low and medium definitions terrains.

          DN house contours - pbacot - High Def.skp

          House pbacot 6 Jan 13 - high def.png

          Fredo

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          • fredo6F Offline
            fredo6
            last edited by

            @utiler said:

            Thanks Fredo, so if I triangulated points with your triangulate plugin then ran toposhaper I'd get this result!!!!???

            With TopoShaper you really need to have contours as curves, not a set of altitude points. This is because the Terrain construction uses contours to delimit the zone of influence on points comprised between contours.

            With a set of altitude points, the algorithm would be more based on Skinning, with Bezier or Nurbs methods, which is another kind of script (I can do it, but it would definitely not be very fast with Ruby only).

            So, all you need is the contours and then run Toposhaper, as shown in previous videos and the video below

            TopoShaper pbacot on House 50.gif

            Fredo

            PS: As far as I remember, I have not written (yet) a "triangulate plugin".

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            • P Offline
              Panga
              last edited by

              @unknownuser said:

              With TopoShaper you really need to have contours as curves, not a set of altitude points. This is because the Terrain construction uses contours to delimit the zone of influence on points comprised between contours.

              With a set of altitude points, the algorithm would be more based on Skinning, with Bezier or Nurbs methods, which is another kind of script (I can do it, but it would definitely not be very fast with Ruby only).

              Fredo,

              During my works I found a workaround with altitude points. I draw a high vertical line on each point (as they're usually components, it's a very fast operation), this way the sandbox is using contours instead of points, ignoring the bottom point of each line. Will this method work with your plugin ?

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              • fredo6F Offline
                fredo6
                last edited by

                @panga said:

                During my works I found a workaround with altitude points. I draw a high vertical line on each point (as they're usually components, it's a very fast operation), this way the sandbox is using contours instead of points, ignoring the bottom point of each line. Will this method work with your plugin ?

                Unfortunately, it won't work. TopoShaper really needs contours to drive the interpolation. Keep in maind that with only altitude points, there are multiple solutions because you cannot isolate zones just with scarced points.

                Fredo

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                • utilerU Offline
                  utiler
                  last edited by

                  Fredo, I assume Toposhaper is a work in progress and hasn't been released yet? I can't find it for download...

                  Cheers,

                  purpose/expression/purpose/....

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                  • fredo6F Offline
                    fredo6
                    last edited by

                    @utiler said:

                    Fredo, I assume Toposhaper is a work in progress and hasn't been released yet? I can't find it for download...

                    Cheers,

                    Correct, it is work in progress. However, I think I have done most of the algorithmics now and should be able to release a first simple version soon.

                    In the meantime, I am still interested in getting models of contours to test the plugin.

                    Fredo

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                    • utilerU Offline
                      utiler
                      last edited by

                      OK, do you want them in DWG or SU? I'll send a few through....

                      purpose/expression/purpose/....

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                      • pbacotP Offline
                        pbacot
                        last edited by

                        I'm "cooking" one up in Sandbox right now. I'll send the file when it gets done. Taking about 10 min. to do "from contours". It's a nice one with hills and saddles.

                        MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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                        • T Offline
                          twestover
                          last edited by

                          Will the plugin work with an already triangulated surface?

                          Say I have imported and triangulated a set of XYZ data, and wish to turn it into a solid group like your final product, with vertical sides and a horizontal bottom. Is that possible?

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                          • utilerU Offline
                            utiler
                            last edited by

                            Fredo, would you like contours in DWG or SU?

                            purpose/expression/purpose/....

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                            • fredo6F Offline
                              fredo6
                              last edited by

                              @utiler said:

                              Fredo, would you like contours in DWG or SU?

                              I prefer SU as I am not familiar with CAD and Archi software (I don't know DWG format).

                              Thanks in advance

                              Fredo

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                              • pilouP Offline
                                pilou
                                last edited by

                                @unknownuser said:

                                I prefer SU as I am not familiar with CAD and Archi software

                                Except one! SU Itself πŸ˜‰

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

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                                • utilerU Offline
                                  utiler
                                  last edited by

                                  Here's a few contour Skippy's, Fredo.

                                  Survey01 - contours or a regular residential site of about 800sqm with a 15m fall. Contours at 250mm....

                                  survey01.skp

                                  Survey02 - contours over a commercial development site of about 2800sqm. Contours at 200mm increments with minimum grad.

                                  survey02.skp

                                  purpose/expression/purpose/....

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                                  • fredo6F Offline
                                    fredo6
                                    last edited by

                                    Andrew

                                    First of all, thanks very much for posting these 2 samples. They are extremely useful for fine tuning the algorithms.

                                    I have problem about the calculation of the concave hull for the first one, but here is the second one, in 2 flavors:

                                    • the original altitude (which are very flattish)
                                    • the exaggerated altitudes which help me to better check the calculations

                                    utiler_survey02.skp

                                    Utiler Survey02 by TopoShaper.png

                                    Utiler Survey02 by TopoShaper max.png

                                    Fredo

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                                    • KrisidiousK Offline
                                      Krisidious
                                      last edited by

                                      subscribed... 😲

                                      By: Kristoff Rand
                                      Home DesignerUnique House Plans

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                                      • utilerU Offline
                                        utiler
                                        last edited by

                                        No problem, Fredo, I'm not surprised at issues with the first one as it was a survey of a site with an existing residence on it which prevented a uniform data to be taken...

                                        What you've done with the other one looks good! Can't wait to see how this plugin ends up. I'll see if I can dig out some other survey plans off file and convert them for you.

                                        πŸ‘

                                        purpose/expression/purpose/....

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                                        • fredo6F Offline
                                          fredo6
                                          last edited by

                                          @utiler said:

                                          No problem, Fredo, I'm not surprised at issues with the first one as it was a survey of a site with an existing residence on it which prevented a uniform data to be taken...

                                          I evolved the algorithm for calculating the concave hull on your complex model and could obtain a result on your model, without any change, here attached.

                                          A lot of the problem come from the small terminations hooks in several contours, like illustrated on the picture below
                                          TopoShaper small hooks.png

                                          The issue with terrain construction is that you need to have a correct hull in order to determine the spatial distribution of the influence of the contours.

                                          utiler_survey01.skp

                                          TopoShaper Utiler Survey 01.png

                                          TopoShaper Utiler Survey 1.gif

                                          Fredo

                                          PS: I hope to finish a first version in 2-3 weeks time, as I have actually very few moment available currently

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                                          • EarthMoverE Offline
                                            EarthMover
                                            last edited by

                                            Can't wait! Thanks Fredo!

                                            3D Artist at Clearstory 3D Imaging
                                            Guide Tool at Winning With Sketchup
                                            Content Creator at Skapeup

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