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    [Plugin] Import OBJ with Materials v2.1 20131118

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    • W Offline
      Whaat
      last edited by

      Hi TIG,

      I can't quite tell from your description if your script imports UVs correctly. If you are looking to add this feature, I was working on an OBJ importer awhile ago that imported materials and UVs. If you would like the code, let me know and you can have it. I don't think I'll ever get around to releasing it officially.

      Thanks for another great script!

      SketchUp Plugins for Professionals

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      • TIGT Offline
        TIG Moderator
        last edited by

        @whaat said:

        Hi TIG,

        I can't quite tell from your description if your script imports UVs correctly. If you are looking to add this feature, I was working on an OBJ importer a while ago that imported materials and UVs. If you would like the code, let me know and you can have it. I don't think I'll ever get around to releasing it officially.

        Thanks for another great script!

        My tool imports materials and textures. It doesn't deal with UVs as most of the example OBJs I have didn't have that info in their MTLs. Thus any imported material has it's colour and opacity set correctly, AND also has the correct texture added BUT without any UVs scaling etc - it uses the default 10" square version... However if you already have a pre-existing material with a matching name that has UVs set etc it asks if you want to use it or make a new variant - if you answer Yes it uses the existing material...

        Am I right in understanding you, that some OBJ/MTLs have UV mapping info ? SUp exported OBJ/MTLs don't seem to ? Please PM me your half-baked UV code and I'll look at incorporating it [with credit to you, as appropriate]... Thanks for the offer.

        TIG

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        • K Offline
          Khai
          last edited by

          yup UV information is a core part of the OBJ Format.. makes it very useful for transfering between programs, such as Maya to trueSpace to Max....

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          • TIGT Offline
            TIG Moderator
            last edited by

            @khai said:

            yup UV information is a core part of the OBJ Format.. makes it very useful for transfering between programs, such as Maya to trueSpace to Max....

            Where is it stored in the files ?

            TIG

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            • K Offline
              Khai
              last edited by

              I think it's stored as the VT entries.

              ah yes here we go

              http://local.wasp.uwa.edu.au/~pbourke/dataformats/obj/ - Full OBJ Format Spec

              @unknownuser said:

              vt u v w

              Vertex statement for both polygonal and free-form geometry.
              
              Specifies a texture vertex and its coordinates. A 1D texture
              requires only u texture coordinates, a 2D texture requires both u
              and v texture coordinates, and a 3D texture requires all three
              coordinates.
              
              u is the value for the horizontal direction of the texture.
              
              v is an optional argument.
              
              v is the value for the vertical direction of the texture. The
              default is 0.
              
              w is an optional argument.
              
              w is a value for the depth of the texture. The default is 0.
              
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              • bagateloB Offline
                bagatelo
                last edited by

                @chris fullmer said:

                I'm confused Bagatelo. What are you asking? This is a plugin that will import .obj into SU. The inverse would be an .obj exporter.

                Chris

                Yes, I mistake. I have think about EXPORT model with obj file types. But .3ds is very good.

                I try to import this model ( http://www.evermotion.org/modelshop/show_product/sculpture-01-am34/1806/0/0/ ) into sketchup and the plugin don't work properly. Export with 3ds Files from MAX result crash in Sketchup.

                FBX files maybe can be de very best option.

                While the cat's away, the mice will play

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                • TIGT Offline
                  TIG Moderator
                  last edited by

                  @khai said:

                  I think it's stored as the VT entries.

                  ah yes here we go

                  http://local.wasp.uwa.edu.au/~pbourke/dataformats/obj/ - Full OBJ Format Spec

                  @unknownuser said:

                  vt u v w

                  Vertex statement for both polygonal and free-form geometry.
                  
                  Specifies a texture vertex and its coordinates. A 1D texture
                  requires only u texture coordinates, a 2D texture requires both u
                  and v texture coordinates, and a 3D texture requires all three
                  coordinates.
                  
                  u is the value for the horizontal direction of the texture.
                  
                  v is an optional argument.
                  
                  v is the value for the vertical direction of the texture. The
                  default is 0.
                  
                  w is an optional argument.
                  
                  w is a value for the depth of the texture. The default is 0.
                  

                  Thanks - I see it now... wait for update...

                  TIG

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                  • TIGT Offline
                    TIG Moderator
                    last edited by

                    @bagatelo said:

                    @chris fullmer said:

                    I'm confused Bagatelo. What are you asking? This is a plugin that will import .obj into SU. The inverse would be an .obj exporter.

                    Chris

                    Yes, I mistake. I have think about EXPORT model with obj file types. But .3ds is very good.

                    I try to import this model ( http://www.evermotion.org/modelshop/show_product/sculpture-01-am34/1806/0/0/ ) into sketchup and the plugin don't work properly. Export with 3ds Files from MAX result crash in Sketchup.

                    FBX files maybe can be de very best option.

                    Since I'm not going to pay $35 for a model of a small statue I can't see how the actual file is structured - looks like it might be very complex though !!! The current OBJ Importersare quite limited...

                    TIG

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                    • A Offline
                      avariant
                      last edited by

                      Cool, thanks TIG. I've been using Jim's importer for a long time.

                      One thing I've encountered with materials. You are assuming that the 'd' tag comes after the Kd tag, but it doesn't necessarily. It can show up anywhere in the list. The obj format doesn't require a specific order. So, if 'd' comes first, the plugin is crashing.

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                      • TIGT Offline
                        TIG Moderator
                        last edited by

                        Thanks for the info... I'm looking at uv mapping to so a fix might be soon...
                        I also need to trap mtl's with a texture but no colour [using texture.average_color if no Kd ?]... I am looking at various fixes and other improvements... Please check out the Ruby Forum over the coming days...

                        TIG

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                        • K Offline
                          Khai
                          last edited by

                          ok for some reason I'm not getting anything at all.
                          it's asking for the measurements, I see it reading lines at the bottom, it asks me if I want to flip Axis...then nothing appears on screen.

                          edit : testing an idea. I think it's do to with the choice of measurements. hold on...

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                          • K Offline
                            Khai
                            last edited by

                            yup it's metres and kilometres.... looks like it's coming in so tiny you can't see it. (Inches, Feet, yards, Miles, Millimetres, Centimetres are working ok)

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                            • K Offline
                              Khai
                              last edited by

                              and I'm happy to report the UVmapping is now spot on 😄

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                              • EarthMoverE Offline
                                EarthMover
                                last edited by

                                Tested also and it's working Great!!! Thanks TIG. I tried to import a few Lounge Chairs that I had for Vue in .obj format that crashed SU with the previous importer and the new version handled them flawlessly.

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

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                                • TIGT Offline
                                  TIG Moderator
                                  last edited by

                                  I have at last got working - texture mapping, units dialog, YZ-flip, crash avoidance etc etc...

                                  Here's v1.2 http://forums.sketchucation.com/viewtopic.php?p=172790#p172790

                                  Note that the file has been renamed and you need to delete any earlier ones...

                                  It's still not perfect, takes ages with large files and large/complex/smoothed objs come out slow/messy/in_need_of_fixing...

                                  Feedback please.

                                  TIG

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                                  • K Offline
                                    Khai
                                    last edited by

                                    ok I'm getting strange results here. some OBJ's just won't import for some reason. Trying to figure it out atm.. the affected OBJ's will load into other app's ok tho, so I'm not sure what the issue could be.

                                    Update.

                                    the affected OBJ's import with Jim's Ruby ok (apart from flipped Axis and no UVmapping), so it looks like a bug somewhere..

                                    want me to send you a copy of one of the affected OBJ's to test with?

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                                    • TIGT Offline
                                      TIG Moderator
                                      last edited by

                                      @khai said:

                                      ok I'm getting strange results here. some OBJ's just won't import for some reason. Trying to figure it out atm.. the affected OBJ's will load into other app's ok tho, so I'm not sure what the issue could be.

                                      Update.

                                      the affected OBJ's import with Jim's Ruby ok (apart from flipped Axis and no UVmapping), so it looks like a bug somewhere..

                                      want me to send you a copy of one of the affected OBJ's to test with?

                                      Please send... Waht errors do you get in the console etc ?

                                      Jim's code for the faces is effectively the same in both versions ??? 😕

                                      TIG

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                                      • K Offline
                                        Khai
                                        last edited by

                                        thats the problem.. I'm not getting any errors (unless I'm doing something wrong the console window is remaining blank).... I'm just not getting the object...

                                        the steps I'm getting :

                                        select Ruby
                                        Select OBJ
                                        asked what unit's. (choose at random here)
                                        Status bar shows the lines being read

                                        here on a file that works I see the OBJ loaded. on a file thats not working, the view jumps, nothing is shown.

                                        asked if I want to flip axis. (y/n)

                                        no change in scene from start. - this also happens if I choose Metres or kilometers with an OBJ that does work ok. (obj will load as Feet...) the affected OBJ's will load with Jim's original script tho shrug

                                        ok.. where do you want me to send the files to? I can't seem to attach them here...

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                                        • TIGT Offline
                                          TIG Moderator
                                          last edited by

                                          @khai said:

                                          thats the problem.. I'm not getting any errors (unless I'm doing something wrong the console window is remaining blank).... I'm just not getting the object...

                                          the steps I'm getting :

                                          select Ruby
                                          Select OBJ
                                          asked what unit's. (choose at random here)
                                          Status bar shows the lines being read

                                          here on a file that works I see the OBJ loaded. on a file thats not working, the view jumps, nothing is shown.

                                          asked if I want to flip axis. (y/n)

                                          no change in scene from start. - this also happens if I choose Metres or kilometers with an OBJ that does work ok. (obj will load as Feet...) the affected OBJ's will load with Jim's original script tho shrug

                                          ok.. where do you want me to send the files to? I can't seem to attach them here...

                                          Zip the file and attach it to a PM...

                                          TIG

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                                          • K Offline
                                            Kgon
                                            last edited by

                                            Hello everyon!!

                                            Well,i'm trying this plugin and it seems awesome , but im having a problem with it, after the import nothing shows up..i mean sketchup makes the entire process ( count of the lines) and once SU finish ...nothing is displayed in the screen...it says " x number of lines processed" but the su file is clean as when you open a new file..so...m i doing something wrong? i'm trying importing a XFrog tree ,sometimes su ask me for to flip yz ,sometimes don't but no matter what option i select yes or not nothing works..., any clue ??

                                            By the way my xfrog trees are in max ,i open them in max then i export them like an .Obj file format ..Could it be a max exporting issue that don't let the object importer works well with the xported Object??

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