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    [Plugin] Import OBJ with Materials v2.1 20131118

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    • C Offline
      chango70
      last edited by

      @immer said:

      Thanks, but I've got enough projects on my plate already, I was just lopping a few warts off a new tool in my box. I've seen Fluid, but my main dabbling machine is an old Mac so it's not convenient to use.

      I can completely relate to not wanting to make frequent updates to old projects though, so here's my faster version for anyone interested.[attachment=0:1hpltocr]<!-- ia0 -->obj_importer.rb<!-- ia0 -->[/attachment:1hpltocr]

      Cool will give it a spin shortly.

      Cheers

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      • G Offline
        gmfs1410
        last edited by

        TY ...

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        • D Offline
          Danobe1964
          last edited by

          This plugin is the missing link between SketchUp and "Bryce 7 PLE" (also free) that I use as a renderengine.
          It is a perfect team and this obj-exporter is the hard to find plugin.
          Many thanks!
          Daniel

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          • A Offline
            Arzka007
            last edited by

            Great plugin, thanks.

            However, I have a problem with many OBJ files I try to import to SketchUp... Textures are missing. 😞

            From previous posts i realized that this is not actually a "bug" in OBJ importer. The reason is that many OBJ files are originally exported with "hard coded" texture paths (instead of relative pathing). So OBJ importer is trying to find textures from folder that doesn't exist in my computer...

            But hey, maybe it could be possible to do something for this?

            Maybe you could add a setting for "default textures folder", so that OBJ importer would always look for textures from that user-defined folder (and it's subfolders) when OBJ file is imported? Or maybe textures that are in the same folder with OBJ file (or in /Textures folder) could be automatically imported with OBJ file?

            I know that this can be done by editing manually MTL file that comes with OBJ file, but that's too much "hacking" for me... Especially if I have to do this with every sigle OBJ file that I import to SketchUp...

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            • TIGT Offline
              TIG Moderator
              last edited by

              The MTL file almost always goes in the same folder as the OBJ file - if you open the OBJ file in a text editor like Notepad it shows the MTL 'relative' path in the first few lines...
              If you open the MTL file in a text editor like Notepad it shows the path expected to each of the image-files used for the textures. Simply place the image-files [if you have them] in the same relationship - either in the same folder as the MTL or a subfolder suitably named...

              TIG

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              • A Offline
                Arzka007
                last edited by

                Yeah that can be done of course - it's just not always very handy.

                For exaple, a guy who originally created the 3d object might have stored his textures into folder like this:

                C:\Documents and Settings\Leonardo\projects\maya\sci-fi\spaceships\enterprise\textures

                Before I could place my textures in similar location, I would first have to create folder "Leonardo", then subfolder "projects", then subfolder "maya" etc. As I said, not very handy...

                Programs like "Accutrans" and "Deep Exploration" have this "default textures folder" function. Or, if they can't find textures either in folder that is defined in MTL file or in "default textures folder" they ask the user "do you want to locate textures manually?".

                I just thought that OBJ Importer could have some similar function... But maybe it's too much to ask all the features that are in commercial applications from a free plugin...

                (Don't get me wrong, OBJ Importer is really really great plugin already just the way it is.) πŸ‘

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                • TIGT Offline
                  TIG Moderator
                  last edited by

                  No!
                  A GOOD OBJ exporter typically makes copies all of the linked image-files either in the same folder as the OBJ, OR better in a subfolder called Images or XXX_Images or XXX_Textures, where XXX is the name of the OBJ file - OR it just fails to export them like 'tree3d.exe'.
                  The OBJ file says which MTL file it's using in the first few lines of code - typically it's just a name and the MTL is a file in the same folder as the OBJ, with a matching name but the .mtl suffix.
                  Then for each collection of faces defined in the OBJ it sets the material 'by name' that it'll be used for those faces, and there's a list of materials 'by name' defined within the MTL file - each with its own color, transparency, texture etc.
                  The MTL file sets the path to an image-file, if any, because an MTL can just be a 'color'.
                  That path as I said is typically to a file in a subfolder, kept with the OBJ/MTL, that holds jpg/png files, named exactly as specified in the MTL file...

                  An OBJ importer looks for the MTL file... and if it exists then it applies the materials in it to the appropriate face-sets... it looks for the specified image-file [if any] for each material and if it's found it then uses that too...

                  If you have the image-files it's a simple matter of putting them in the path specified in the MTL - in my experience I have never seen anything other than a list of file names [i.e. the image-files are in the same folder as the MTL file OR more commonly the image-files are in a subfolder kept with the MTL file πŸ˜•

                  IF the MTL file is 'messed up' then manually edit it to repath each of the image-files defined in the lines starting 'map_Kd ' thus:
                  map_Kd Images/image1.png
                  and where 'image1.png' id the name of the file you have that should be used...
                  and where you have made a new folder called 'Images' kept with the MTL file and you have put all of the image-files in there!

                  TIG

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                  • A Offline
                    Arzka007
                    last edited by

                    "A GOOD OBJ exporter typically makes copies all of the linked image-files either in the same folder as the OBJ, OR better in a subfolder called Images or XXX_Images or XXX_Textures, where XXX is the name of the OBJ file"

                    I couldn't agree more that that's the way is SHOULD be done. However, many programs, for example popular 3ds Max, don't do it that way by default. (Why not, I have no idea.)

                    When you save an object from 3ds Max in OBJ format (using default settings), linked image-files are NOT copied to the folder where OBJ and MTL files are saved. MTL file only contains links to original texture folder.

                    And when people try to open these files (in other computers) they can't see textures... And they keep filling forums with questions like "missing textures when opening OBJ file" (as seen in this thread also).

                    But hey, who cares, let's forget the whole thing! πŸ’š

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                    • TIGT Offline
                      TIG Moderator
                      last edited by

                      http://forums.sketchucation.com/viewtopic.php?p=284378#p284378
                      explains how OBJ should be exported from 3dsMax...

                      Because an MTL is a text file it not that hard to find every image file in the list and remove all but the file name from the path, the replace the first part with a folder path
                      So
                      map_Kd SomeFolder/SomeOtherFolder/YetAnotherFolder/Images/image1.png
                      becomes [if the folder path is always the same a bulk Find+Replace edit is possible]
                      map_Kd image1.png
                      then you use a bulk Find+Replace ' map_Kd' >>> ' map_Kd Images/'
                      so you have
                      map_Kd Images/image1.png
                      etc for all of the image-files...
                      Then move all of the image-files into an 'Images' folder with the MTL...
                      It should work fine...

                      TIG

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                      • thomthomT Offline
                        thomthom
                        last edited by

                        Got a feature request: Make it use the Importer class: http://code.google.com/apis/sketchup/docs/ourdoc/importer.html

                        That way it can be found under the native importer options.

                        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

                          hm...

                          Importing a OBJ file now, I'm getting lots of Error: 666 in the Ruby Console. πŸ˜•

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

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                          • TIGT Offline
                            TIG Moderator
                            last edited by

                            Sometimes OBJ files throw an error [I suspect that it depends how they were 'written' originally - there are several different 'formats' - e.g. define some vertices then related faces per group... or define all vertices then all faces en mass; which is more difficult to read 'manually' too] - the geometry for the face is invalid - the three points are perhaps colinear or [effectively] coincident - so I get it to put up an error instead of crashing... The 666 is a longstanding joke with Rich πŸ˜’ http://forums.sketchucation.com/viewtopic.php?p=316402#p316402
                            Although it throws the errors up it usually seems to make the expected geometry - so it's difficult to see what's 'gone wrong' πŸ˜•
                            You can of course easily tweak the 666 rescue message to include the Exception - but frankly I found that little use either...
                            My importer is not [always] as good as the compiled dll version that is available.
                            For MAC it is the only option.

                            TIG

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                            • thomthomT Offline
                              thomthom
                              last edited by

                              There is a compiled version?

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

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                              • TIGT Offline
                                TIG Moderator
                                last edited by

                                @thomthom said:

                                There is a compiled version?

                                Here http://forums.sketchucation.com/viewtopic.php?p=316470#p316470
                                Fluid's free OBJ importer [PC only]...

                                TIG

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

                                  Fluid obj importer in the extensions forum.

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

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

                                    Sorry, I posted this earlier but lost web connection.

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

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                                    • N Offline
                                      niks
                                      last edited by

                                      hi Tig..thank you for this ama 😍 ing...plugin

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                                      • C Offline
                                        capsssa
                                        last edited by

                                        Please,
                                        i need help.
                                        I've got the version 7 pro, i am on a mac, but when i installed this plugin it doesn't work.
                                        I am on a mac. When i poen sketchup the plugin is absent.
                                        Can you help me, please ?

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                                        • TIGT Offline
                                          TIG Moderator
                                          last edited by

                                          You have probably installed it in the wrong folder - check where your MAC Plugins folder is and ensure you put it in there...
                                          It is accessed off the Plugins menu.
                                          I would recommend the FluidImporter but I think it's PC only...

                                          TIG

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                                          • chippwaltersC Offline
                                            chippwalters
                                            last edited by

                                            Hey TIG,

                                            How come this file (simple) won't import with map? I created it using UV Mapper Pro, which is pretty standard IMO. Any insight you might have would help greatly!!!

                                            Link Preview Image
                                            Dropbox - 404

                                            favicon

                                            (dl.dropbox.com)

                                            Currently working with Cross-Reality technologies

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