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    [Plugin] Import OBJ with Materials v2.1 20131118

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    • TIGT Offline
      TIG Moderator
      last edited by

      honoluludesktop
      A DXF has alternating lines for 'code' and 'value'.
      So if it's an odd-numbered line then it's always 'code' and if it's an even-numbered line it's always the previous line's code's 'value'...
      It's a DXF convention to indent the 'code' number, BUT it's not necessary and any importer should strip off leading spaces anyway...

        0
      SECTION
        2
      HEADER
        9
      etc
      

      is the same as

      0
      SECTION
      2
      HEADER
      9
      etc
      

      To see a DXF 'parser' look at my DXF Text Importer http://forums.sketchucation.com/viewtopic.php?p=194488#p194488
      πŸ€“

      TIG

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      • honoluludesktopH Offline
        honoluludesktop
        last edited by

        OK, thanks, I will look at it. I may have to wait for a complete rewrite to parse the 'code'. Isn't some of that done in the Obj translator? I couldn't tell since I am not at all familiar with Obj.

        When I think about it, any translator can be a modular app., just as you did with the text importer as a supplement to SUs DxfIn. My own interest has been limited to very basic geometry, and dealing with the anomalies of my Cad's DxfIn/Out. It suits me since I use SU exclusively for visualization and modeling, and Cad for functional diagramming and production drawings. Accordingly, I only require the basic geometry to pass between SU and Cad.

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        • O Offline
          onesimo
          last edited by

          hi tig! thanks for the importer. its working perfectly for me on my archmodels.
          i should have tried it when i first saw the post. thanks so much and i really appreciate your work.

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          • O Offline
            onesimo
            last edited by

            hi tig! im using 3ds max design 2011. when i open/obj import my exported file the textures are not showing.. it seems my .mtl file is different from the one posted (the one with the building). thanks!


            my exported file from 3ds max

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            • KrisidiousK Offline
              Krisidious
              last edited by

              I imported an Obj file and the uvw map came in perfectly.

              objimporter02.jpg

              but some geometry was lost... any ideas on why?

              objimporter01.jpg

              By: Kristoff Rand
              Home DesignerUnique House Plans

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              • TIGT Offline
                TIG Moderator
                last edited by

                @onesimo said:

                hi tig! im using 3ds max design 2011. when i open/obj import my exported file the textures are not showing.. it seems my .mtl file is different from the one posted (the one with the building). thanks!

                The MTL file has the lines

                Ka 0.0000 0.0000 0.0000
                Kd 0.0000 0.0000 0.0000
                Ks 0.3500 0.3500 0.3500
                

                they should read

                Ka 0.0000 0.0000 0.0000
                Kd 0.3500 0.3500 0.3500
                Ks 0.0000 0.0000 0.0000
                

                The Kd value sets the material's RGB color in the original MTL file it is [0,0,0] = 'black'
                If you swap the Kd and Ks values and it renders 'gray' as expected...
                Only the 'Kd' value is read by the SUp importer - the other twp 'K' values involve reflectivity and spectral info that SUp can't use and are superfluous...
                Also if an MTL material has an image_file defined at the end of its text_block that will be used as its 'texture', overriding any RGB 'color' - but this material does not have a texture.
                When you make an OBJ file check that its MTL file's 'Kd' is set to RGB otherwise it will be 'black'.

                TIG

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                • TIGT Offline
                  TIG Moderator
                  last edited by

                  @krisidious said:

                  I imported an Obj file and the uvw map came in perfectly.
                  but some geometry was lost... any ideas on why?

                  The OBJ importer should import all available geometry described in the file - sometimes with very convoluted meshes it can fail, but it rarely 'misses' stuff out - in fact it's more likely to try and tie vertices together that don't join in the original with extra geometry!
                  If you import the same file into another app - like Blender? - is it still missing parts?
                  If so perhaps the export didn't pick up parts in the first place πŸ˜•
                  What app made the OBJ file originally?

                  TIG

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                  • KrisidiousK Offline
                    Krisidious
                    last edited by

                    @tig said:

                    @krisidious said:

                    I imported an Obj file and the uvw map came in perfectly.
                    but some geometry was lost... any ideas on why?

                    The OBJ importer should import all available geometry described in the file - sometimes with very convoluted meshes it can fail, but it rarely 'misses' stuff out - in fact it's more likely to try and tie vertices together that don't join in the original with extra geometry!
                    If you import the same file into another app - like Blender? - is it still missing parts?
                    If so perhaps the export didn't pick up parts in the first place πŸ˜•
                    What app made the OBJ file originally?

                    it came from AC3D, I tried the file in 3Dmax and it's all there. it's no biggy, I don't need to do it. I was just trying it out.

                    By: Kristoff Rand
                    Home DesignerUnique House Plans

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                    • TIGT Offline
                      TIG Moderator
                      last edited by

                      Kristoff

                      Can you PM me the OBJ/MTL etc [zipped].
                      I'd like to see if I can find out the cause anyway... πŸ€“

                      TIG

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                      • TIGT Offline
                        TIG Moderator
                        last edited by

                        Kristoff

                        I got the 'Ford' OBJ file by PM.
                        It imported fine for me... IF I set the units to 'meters' - it also then comes in at the correct 'size'!
                        If you use 'mm' it is tries to make some edges that are 1000 times too small 0 as you might have seen in other threads that guarantees that geometry fails to be made. SUp / OpenGL doesn't like anything smaller than about 0.1mm...
                        The importer reads the OBJ file's 'header' and if it has 'units=' in it then that is given as the default displayed in the dialog as it starts, otherwise it defaults to 'inches'.
                        In the case of this 'Ford' OBJ there's no header info at all, so you need to take a guess - trying larger scale units should always make geometry as the 0.1mm is never likely but of course the imported object might then be the wrong 'size'.
                        Meters are a common unit in non-US made OBJs...
                        So, panic over - try it in 'meters' and it should work fine... πŸ€“

                        TIG

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                        • KrisidiousK Offline
                          Krisidious
                          last edited by

                          damn counting with 10's burned me again... (hits self in head meter not millimeter!)

                          awesome plugin. I also love the groupstoobj.rb ...

                          By: Kristoff Rand
                          Home DesignerUnique House Plans

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                          • E Offline
                            eloiraiol
                            last edited by

                            Because the images do not appear in the trial, only show the textures in SketchUp itself. Where is a picture is blank!

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                            • TIGT Offline
                              TIG Moderator
                              last edited by

                              @eloiraiol said:

                              Because the images do not appear in the trial, only show the textures in SketchUp itself. Where is a picture is blank!

                              Please explain your problem another way... I don't understand πŸ˜•

                              TIG

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                              • W Offline
                                wyatt
                                last edited by

                                I'm stepping into an area that I don't fully understand, so hopefully this question makes sense. I would like to import an obj with vertex colors turned on. I have a tcs file that I believe contains the vertex color data, but the obj and mtl don't appear to reference that file at all. I haven't found much searching Google for the tcs file format. Is it possible to import vertex colors into SU?

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                                • TIGT Offline
                                  TIG Moderator
                                  last edited by

                                  @unknownuser said:

                                  I'm stepping into an area that I don't fully understand, so hopefully this question makes sense. I would like to import an obj with vertex colors turned on. I have a tcs file that I believe contains the vertex color data, but the obj and mtl don't appear to reference that file at all. I haven't found much searching Google for the tcs file format. Is it possible to import vertex colors into SU?

                                  Not with this tool - it only imports 'faces' with their colors/textures - not even raw 'edges'...

                                  TIG

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                                  • thomthomT Offline
                                    thomthom
                                    last edited by

                                    Vertex colours, the connected face should have a surface that blends the colour from each vertex?

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

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                                    • W Offline
                                      wyatt
                                      last edited by

                                      Yes, that's the idea.

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                                      • majidM Offline
                                        majid
                                        last edited by

                                        thanx again TIG πŸ‘ now I can play with sculptris + SU

                                        My inspiring A, B, Sketches book: https://sketchucation.com/shop/books/intermediate/2612-alphabet-inspired-sketches--inspiring-drills-for-architects--3d-artists-and-designers-

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                                        • Chris FullmerC Offline
                                          Chris Fullmer
                                          last edited by

                                          @unknownuser said:

                                          I'm stepping into an area that I don't fully understand, so hopefully this question makes sense. I would like to import an obj with vertex colors turned on. I have a tcs file that I believe contains the vertex color data, but the obj and mtl don't appear to reference that file at all. I haven't found much searching Google for the tcs file format. Is it possible to import vertex colors into SU?

                                          Wyatt, where di you get the "tcs" file? I think I know what you're asking, but I have not seen any tcs file at any point. I'm scheming some things right now along these lines.

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

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                                          • W Offline
                                            wyatt
                                            last edited by

                                            Hey Chris. Yes, the tcs file comes from tree[d]. I'm not at my computer right now, but from what I remember it's a series of rgb values that I believe tree[d] uses to compute the color variations in the leaves. It would be great if you are figuring out a way to use that data in SU. Let me know if I can help.

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