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    [Plugin] Import OBJ with Materials v2.1 20131118

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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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                                  • P Offline
                                    pibuz
                                    last edited by

                                    +1 to Wyatt's request! Could be very useful using Tree[d] trees!

                                    WEB (ita) - https://filipposcarso.wixsite.com/ordinentropico

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                                    • Z Offline
                                      zubenelgennubi
                                      last edited by

                                      thank you so much!!!!!

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                                      • R Offline
                                        rattusNOR
                                        last edited by

                                        worked very well... thanks!!

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                                        • 3 Offline
                                          3deviator
                                          last edited by

                                          hellow TIG, i got some problem using this plug-ins. i don't know if the import OBJ plug-ins have a problem or the software i used. I use Frecle tree[d] 3.1 its a free tree generator software to generate tree and export it to .obj file and then import it to sketchup pro 8 using Import OBJ. when i finish importing it, the tree has no texture even i use import OBJ[with texture]as seen in the pictures. whats the problem for it TIG? Anyways, heres the link for tree[d]3.1 software http://www.frecle.net/index.php?show=treed.about . It is great help to us if you can fix this one, we can generate trees and load it to sketchup. hope you will reply this post, thanks.


                                          Exported files


                                          imported files to sketchup

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                                          • TIGT Offline
                                            TIG Moderator
                                            last edited by

                                            3deviator

                                            The fault isn't with OBJimporter itself but rather with the 'tree[d]' OBJ exporter.
                                            It makes a OBJ file describing the geometry and a MTL file describing the materials but fails to export the image files to which the MTL file refers.
                                            If you open the MTL file with notepad you'll see some image files specified at the end of each material definition - e.g. map_Kd wood03.png
                                            These image files are in the tree[d] 'Textures' folder - typically it's C:\Program Files\gile[s]\plugins\tree[d]\Textures
                                            Copy the missing image files from that folder to the folder into which you have exported your OBJ/MTL files.
                                            Now your image OBJ file imported into a SKP 'with Textures' will have the textures applied...
                                            Now for the rub! The exported/imported tree[d] is relatively 'useless' !!! It has single sided leaf faces and the texture is only applied to the front faces, so all of the backs show as the default back color - usually a blue/gray AND the leaf faces have visible edges and a diagonal line across the middle.Unfixed SKP
                                            BUT there is a way to fix these issues... β˜€
                                            Put the attached script [ FixtreeD.rb] into ../Plugins folder and reopen the SKP with the tree in it, so that the script is loaded.
                                            Now edit the group containing the tree and type FixtreeD.new into the Ruby Console (it runs on all entities in the current context, so DON'T use it outside of the tree group's edit).
                                            All coplanar edges will be removed.
                                            All other edges are hidden, and no longer cast/receive shadows.
                                            The leaves' front materials are copied to their backs.
                                            Hidden Geometry is switched 'off'.
                                            Progress is reported in the Status Bar and Ruby Console
                                            It can take some time to process a complex tree that has 1000s of partsPut into ..Plugins folder... The attached zip file contains a tree[d] exported OBJ/MTL AND the required images listed in that MTL [but not exported by tree[d]!], it also contains the imported OBJ tree showing the problems...Examples This image shows what the 'fixed' tree looks like with the edges/back_faces etc sorted...Example of 'fixed' SKP

                                            TIG

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