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    [Plugin] Bitmap To Mesh

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    • Dave RD Offline
      Dave R
      last edited by

      Dedmin, that looks nice.

      I did make the heighfield map in SketchUp so I know that part can be done. Here's the mesh from which I made the map.

      http://farm5.static.flickr.com/4118/4791556894_9724ee2004_z.jpg

      Etaoin Shrdlu

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      • D Offline
        dedmin
        last edited by

        Sure - I mean the plugin. Can that plugin make so small mesh from an image without scaling? Looks good Dave πŸ‘
        By the way, did You notice that Layout 3 can now paste Excel tables - very handy!

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        • shuraS Offline
          shura
          last edited by

          Jeff, that concentric wave looks great!

          Thomas, sorry but I won't be able to get out of Berlin atm. We are preparing to move to a new appartment with my son being only six weeks old, and Munich is 600km from here... 😒
          Enjoy your time there - and don't forget that not all of us germs wear leather pants and drink beer until they pass out. πŸ˜†

          alex

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          • thomthomT Offline
            thomthom
            last edited by

            @shura said:

            and don't forget that not all of us germs wear leather pants and drink beer until they pass out. πŸ˜†

            What?! I've been lied to!! πŸ˜„

            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

              @unknownuser said:

              yeah, it works in sketchup..
              tt's script scales everything to a square so i made the mistake of adding more black for an overall 500x500 px (4times the recommended resolution of 250x250)..

              it came in at a modest 1.25 million entities πŸ˜„

              I'll update it with a tool for placing the mesh in the model, with correction aspect ratio and let you define a height - basically let you draw a bounding box.
              Maybe even with an option to sample less pixels.

              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

                @thomthom said:

                Maybe even with an option to sample less pixels.

                Or... Maybe interpolate pixels... Though - the same could be done by the user by just scaling down the image...

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

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                • Dave RD Offline
                  Dave R
                  last edited by

                  Dedmin, thanks. Since I haven't been able to do it yet, I don't know but I fully expect I'd have to scale the mesh to the right size. Looks like Jeff managed it, though.

                  As to the excel tables into LO, yes. I did see that. You can't do anything about formatting once it is in, though. Oh well, maybe in LO4.

                  Etaoin Shrdlu

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                  • shuraS Offline
                    shura
                    last edited by

                    just used an alpha map and deleted the lower part of the mesh, then flattened it. not talking about quality, but at least it looks like some sort of image tracing...

                    zz.jpg

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                    • ken28875K Offline
                      ken28875
                      last edited by

                      Wow! 😲 😲

                      You keep on amazing me with your plugins, Thomas! You're the man.

                      Thank you very much,

                      _KN

                      Follow Your Dreams.

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                      • Chris FullmerC Offline
                        Chris Fullmer
                        last edited by

                        @thomthom said:

                        Test with simple displacement map:

                        Displacement.png

                        MMMmmmm, a plugin that makes chocolate bars. I'm hungry now!

                        Lately you've been tan, suspicious for the winter.
                        All my Plugins I've written

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                        • thomthomT Offline
                          thomthom
                          last edited by

                          πŸ˜„

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

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                          • MALAISEM Offline
                            MALAISE
                            last edited by

                            ThomThom , for your own knowledge, you should get advantages by visiting ImageJ community (OpenSource)http://www.google.fr/url?sa=t&source=web&cd=1&ved=0CBUQFjAA&url=http%3A%2F%2Frsbweb.nih.gov%2Fij%2F&rct=j&q=ImageJ&ei=ujqnTJXjIZGp4AbwxvGjDQ&usg=AFQjCNGnkzWAmC5t2IbtD4C8ayw1R0v7tg&sig2=e2-bW7zDggSXIeVI7vPRbA&cad=rja. They work around scientific pictures, and all the ways to extract informations .

                            Thank you really very much for all the plugins you give us.

                            MALAISE

                            La Connaissance n'a de valeur que partagΓ©e

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                            • Dave RD Offline
                              Dave R
                              last edited by

                              Except with very small BMP files, I don't seem to have any luck. Even with a small BMP file it takes a long time to process but that could just be my computer.

                              Coen's comment though is intriguing. I was thinking this plugin could be a neat way to get line drawings into SketchUp. I made the attached line drawing as a quick test and got the second image as a result. I inverted the image and got the results in the third image. I wonder if it would be possible to have a control to somehow limit the range in the gray scale. Perhaps any RGB value less than, say, 250,250,250 gets read as 0,0,0? Or perhaps no height is assigned? Perhaps it isn't possible but I wonder.


                              Image001cropped.jpg


                              BMP2Mesh Results.jpg


                              BMP2Mesh Inverted.jpg

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

                                Making Knuckle-Dusters Dave?

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

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                                • Dave RD Offline
                                  Dave R
                                  last edited by

                                  Maybe I should. πŸ˜„ I was just doodling on the pad using AutoDesk Sketchbook.

                                  Etaoin Shrdlu

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                                  • thomthomT Offline
                                    thomthom
                                    last edited by

                                    @dave r said:

                                    I wonder if it would be possible to have a control to somehow limit the range in the gray scale. Perhaps any RGB value less than, say, 250,250,250 gets read as 0,0,0? Or perhaps no height is assigned? Perhaps it isn't possible but I wonder.

                                    It's technical possible to read values lower than 250 as 0, but I don't quite get why?
                                    Though you can do it in PS (or similar) by adjusting the Levels.)

                                    I have an idea of how to make the mesh less spiky though, but it needs some experimenting.

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

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                                    • Dave RD Offline
                                      Dave R
                                      last edited by

                                      I was just thinking that setting some limit so that everything is either black or white and not shades of gray would get rid of the spikes.

                                      Would it be possible to work things so that a face is created only if the value is less than some set point (250,250,250?) and the face is always at Z=0? Delete coplanar edges between faces and you'd have a raster to SKP converter.

                                      Etaoin Shrdlu

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

                                        I like that idea πŸ‘

                                        Kind of Footprint or Ink Stamp tool, lots of uses for it too!

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

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                                        • thomthomT Offline
                                          thomthom
                                          last edited by

                                          @dave r said:

                                          I was just thinking that setting some limit so that everything is either black or white and not shades of gray would get rid of the spikes.

                                          The spikes you see if much due to the extreme height of the mesh, and part due to the current triangulation. I'm not sure if making the contrast bigger will reduce then - in either case, Ruby isn't efficient for image manipulation - you'd be just as well off just preparing the image before in an proper image editor.

                                          @dave r said:

                                          Would it be possible to work things so that a face is created only if the value is less than some set point (250,250,250?) and the face is always at Z=0? Delete coplanar edges between faces and you'd have a raster to SKP converter.

                                          It'd be an interesting new tool, but I still think it's best if the image is prepared by the user in an editor and made into complete Black and White (not grey scale).

                                          Then the tool could read all the white or black and generate a mesh - where it could then afterwards trace the outline and remove the interior lines. After running an curve simplification, like the Douglas-Peucker algorithm, and you could end up with a decent vectorized shape from your raster mask.

                                          This would have been so much better if I could read the alpha channel of PNG files. I was a looking at this some time ago, but existing too many third party libraries for my comfort which makes redistribution more complex. The alternative, making a pure standalone ruby PNG interpreter wasn't so easy either, the decompression algorithm wasn't the easiest.

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

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                                          • Dave RD Offline
                                            Dave R
                                            last edited by

                                            Well, it's all voodoo to me so I am glad we have folks like you.

                                            Etaoin Shrdlu

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