• Login
sketchucation logo sketchucation
  • Login
๐Ÿค‘ SketchPlus 1.3 | 44 Tools for $15 until June 20th Buy Now

[Plugin] OBJexporter v3.0 20130131

Scheduled Pinned Locked Moved Plugins
304 Posts 96 Posters 451.3k Views 96 Watching
Loading More Posts
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • M Offline
    michaliszissiou
    last edited by 21 Dec 2011, 17:32

    @jolran
    Just use blender. No need lo learn anything. Just import the obj/edit mode/[W key]/delete double vertices. exit edit mode and export. This will weld all vertices automatically. It's also useful to convert objs to 3ds for nice SU import.
    To eliminate non manifolds/inner faces is more difficult. The ruby plugin works in most cases.

    1 Reply Last reply Reply Quote 0
    • T Offline
      TIG Moderator
      last edited by 19 Jan 2012, 00:19

      Here's v1.7 http://forums.sketchucation.com/viewtopic.php?p=294844#p294844
      Material images with no filetype now auto-revert to PNG [possible with Google Earth Snapshots etc].
      [This betters Pro OBJ-exporter which fails in this case]
      Tolerance for deciding if there is a distorted texture relaxed.

      TIG

      1 Reply Last reply Reply Quote 0
      • B Offline
        Ben Ritter
        last edited by 19 Jan 2012, 14:09

        TIG, thank you again.

        1 Reply Last reply Reply Quote 0
        • I Offline
          IdahoJ
          last edited by 19 Jan 2012, 15:37

          @michaliszissiou said:

          @jolran
          Just use blender.

          Or Meshlab. http://meshlab.sourceforge.net/ I use this a lot to post process exported .obj files and it works very well. Works on cleaning up manifolds and inner faces as well. Very powerful application. Free too ...

          Cheers

          "For a moment, nothing happened. Then, after a second or so, nothing continued to happen."

          1 Reply Last reply Reply Quote 0
          • W Offline
            wongfoon
            last edited by 14 Feb 2012, 02:10

            Great work! I have been looking for something similar for a long time.

            1 Reply Last reply Reply Quote 0
            • W Offline
              wongfoon
              last edited by 14 Feb 2012, 09:22

              It works well in most cases. However there seems to be some problem with flipped (mirrored) objects. Half of the object will be black, maybe due to incorrect normals. Try this model http://sketchup.google.com/3dwarehouse/details?mid=dd9ece07d4bc696c2bafe808edd44356&prevstart=0 and you'll see how.

              1 Reply Last reply Reply Quote 0
              • T Offline
                TIG Moderator
                last edited by 14 Feb 2012, 12:33

                Indeed the SKP is made from two mirrored halves as component-instances.
                Somehow one mirrored version seems to flip the exported faces.
                The SKP does have some issues with faces reverse - like the windows - but even with those fixed it messes up...Capture.PNG
                If you explode the parts and export it's all OK...
                I'll investigate - an instance's transformation SHOULD be properly transferred to any exported faces, obviously it's failing here...
                However, note this... if I export the OBJ to Octane [that should be using the very same OBJexporter algorithms and code (I wrote both!)] then it renders OK with the two parts intact OR exploded. CaptureO.PNG
                Only when it's reimported into a SKP does it mess up... However, the Octane OBJ reimported into a SKP displays no flipped face issues either because the materials are on the backs of one half! - just weirder and weirder...CaptureR.PNGCapture2.PNGCapture3.PNG

                TIG

                1 Reply Last reply Reply Quote 0
                • W Offline
                  wongfoon
                  last edited by 14 Feb 2012, 12:49

                  I am really thankful to your kind and timely response. Similar problems are found with several models downloaded from the warehouse. At this moment I'll try to explode them before exporting, as instructed. So keep up your excellent work!

                  1 Reply Last reply Reply Quote 0
                  • T Offline
                    TIG Moderator
                    last edited by 14 Feb 2012, 13:03

                    I have found that if a component is 'flipped' the triangulated face loops in the OBJ are returned clockwise rather than counterclockwise, while the vertex normals remain correct.
                    Some apps like Octane [and even my olde OBJimporter] ignore this issue and import it as expected, BUT others like the Fluid-OBJimporter and some other MeshLab type app's baulk at this and make the face 'reversed' with the material on its 'back' so you see 'black' ๐Ÿ˜ฎ ...
                    I need to think of a way to see if an instance is mirrored and then reverse the order of the face's vertices to be ccw...
                    ๐Ÿ˜•

                    TIG

                    1 Reply Last reply Reply Quote 0
                    • T Offline
                      TIG Moderator
                      last edited by 14 Feb 2012, 13:52

                      Here's v1.8 http://forums.sketchucation.com/viewtopic.php?p=294844#p294844
                      Fixed the recently reported issues with flipped-instance having reversed face vertices.
                      Now any mirrored/flipped instances should have their exported faces' vertices correctly ordered [ccwise]...
                      Although it's probably safest to explode any mirrored instances if you can, as some apps might still be flaky...


                      Fixed up x-wing SKP


                      Renderer OBJexport [with mirroring correction]

                      TIG

                      1 Reply Last reply Reply Quote 0
                      • T Offline
                        TIG Moderator
                        last edited by 14 Feb 2012, 14:50

                        NOTE: After further testing v1.8 also has issues... so stick with v1.7 till another update is ready ! ๐Ÿ˜ž

                        TIG

                        1 Reply Last reply Reply Quote 0
                        • W Offline
                          wongfoon
                          last edited by 15 Feb 2012, 03:29

                          Is it possible to do this internally within the plugin, to explode and then undo explosion after exporting, as an quick & dirty fix ๐Ÿ˜‰ Hopefully doing so might also fix some other potential tricky issues.

                          1 Reply Last reply Reply Quote 0
                          • T Offline
                            TIG Moderator
                            last edited by 15 Feb 2012, 14:06

                            Here's v1.9 http://forums.sketchucation.com/viewtopic.php?p=294844#p294844
                            Completely has been recoded.
                            Issues with mirrored-instance's faces being reversed is now fully fixed.Capture.PNG

                            TIG

                            1 Reply Last reply Reply Quote 0
                            • I Offline
                              IdahoJ
                              last edited by 15 Feb 2012, 14:20

                              TIG, thanks a million for the updates! I've been using this plugin quite a bit and it's a real time saver for me ... ๐Ÿ˜Ž

                              Cheers.

                              "For a moment, nothing happened. Then, after a second or so, nothing continued to happen."

                              1 Reply Last reply Reply Quote 0
                              • T Offline
                                TIG Moderator
                                last edited by 17 Feb 2012, 09:38

                                Here's v2.0 http://forums.sketchucation.com/viewtopic.php?p=294844#p294844
                                The tolerance checks for deciding if it's a 'distorted texture' have been further improved...

                                TIG

                                1 Reply Last reply Reply Quote 0
                                • G Offline
                                  gzotti
                                  last edited by 18 Feb 2012, 15:26

                                  Hi!

                                  First, thank you for this superb OBJ exporter! I have previously used V1.6 for a large model (about 450.000 triangles mostly from a terrain TIN, counted by Meshlab), which took about an hour to export. The result looked perfect in Meshlab. All other OBJ exporters I tried including the Pro failed on that, so I warmly recommend yours. However, the V2.0 is not finished on the same model after 4 hours. (Win7pro, Core2duo, SU8pro uses 1GB RAM, lots of RAM free.) Was there any big change in the algorithm that causes this? Is it possible to find and try V1.7..1.9?

                                  Kind regards,
                                  Georg

                                  1 Reply Last reply Reply Quote 0
                                  • T Offline
                                    TIG Moderator
                                    last edited by 18 Feb 2012, 16:31

                                    The issue is that any 'mirrored' groups/instances don't export properly with the old versions.
                                    The new version obviously has to do more work to ensure that the nested faces' orientation/UVmapping are now sorted properly in the OBJ code, so it takes longer to complete: unfortunately with Sketchup the processing time gets 'exponentially' longer the more entities there are to be considered - a small file might only takes a second or two longer to complete, but a much larger file WILL take a lot longer to finish...
                                    One way to speed up processing would be to work on a copy SKP, and explode all groups/components before exporting the geometry? Then there'd be nothing to check/explode/heal etc, and therefore less to slow it down...

                                    Here's a copy of the now superseded v1.8 [very similar to v1.6] IF you'd prefer to use that - it IS faster than more recent versions BUT it will give a flawed result with many third-party apps importing the OBJ, IF you have any mirrored instances... You choose...OBJexporter_18.rb

                                    TIG

                                    1 Reply Last reply Reply Quote 0
                                    • B Offline
                                      BigOto
                                      last edited by 20 Feb 2012, 02:31

                                      Hi, this is BigOto2 from YouTube and other places. I'm just here to say this plug-in has been absolutely revolutionary when it comes to modding and creating new tracks for Mario Kart Wii. Me and many others in our community use it to design tracks in Sketchup and then convert them to the model format Mario Kart Wii uses (which requires OBJ). If you want to see any of the tracks created by us just search YouTube for "Mario Kart Wii Custom Track" or something like that. Keep up the great work!

                                      1 Reply Last reply Reply Quote 0
                                      • T Offline
                                        TIG Moderator
                                        last edited by 20 Feb 2012, 12:11

                                        Here's v2.1 http://forums.sketchucation.com/viewtopic.php?p=294844#p294844
                                        Further work on avoiding the glitches with some flipped-instances' face-reversal/orientation/UVmapping.
                                        Slight speed improvement over v2.0...

                                        TIG

                                        1 Reply Last reply Reply Quote 0
                                        • G Offline
                                          gzotti
                                          last edited by 20 Feb 2012, 19:29

                                          Thanks a lot for 1.8 (for my large model) and explaining the differences. 2.0 finally came to an end, after about 6 hours. The model is technically simple enough to hope 1.8 will do.

                                          I tried the 2.1 export on a different, quite complex model with lots of layers and some hidden and, yes, mirrored instances. After a while, a message popup says (I try to translate from the German SU8pro): "By your last action visible geometric shapes were joined to existing geometric shapes on an invisible layer." The model behind the panel looked weird, with lots of missing faces. After closing the panel the export then continued. The message and in-between appearance imply an unwanted edit operation, so I don't dare saving the SKP afterwards. However, after the export, it seems OK again - is there any chance/danger that something is actually edited? On the other hand, the OBJ misses a few faces. The 2.0, which gives the same message, looks worse, with some duplicate and maybe inverted faces in addition to the missing ones, so 2.1 is better, but I am afraid still some work is open. Just to let you know. Again, splendid job, I was disappointed with the Pro export.

                                          1 Reply Last reply Reply Quote 0
                                          • 1
                                          • 2
                                          • 3
                                          • 4
                                          • 5
                                          • 6
                                          • 7
                                          • 8
                                          • 15
                                          • 16
                                          • 6 / 16
                                          • First post
                                            Last post
                                          Buy SketchPlus
                                          Buy SUbD
                                          Buy WrapR
                                          Buy eBook
                                          Buy Modelur
                                          Buy Vertex Tools
                                          Buy SketchCuisine
                                          Buy FormFonts

                                          Advertisement