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[Plugin] OBJexporter v3.0 20130131

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  • 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

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    • 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.

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      • T Offline
        TIG Moderator
        last edited by 20 Feb 2012, 22:28

        πŸ’­ I see the issue - if you have some raw geometry that is hidden or ill-advisedly on an an OFF layer, then it can merge with ON stuff being exported in the next coding... I can fix this though... πŸ˜•

        TIG

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        • T Offline
          TIG Moderator
          last edited by 20 Feb 2012, 23:06

          Here's v2.2 http://forums.sketchucation.com/viewtopic.php?p=294844#p294844
          Resolved the issue of raw geometry, either hidden or ill-advisedly placed on an off-layer [either within the model or inside groups/components] inadvertently merging with exported geometry.
          πŸ€“

          TIG

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          • B Offline
            Bazza
            last edited by 21 Feb 2012, 05:55

            Hi TIG I'm new to sketchup only had it installed a week some one on another site recommended it for modeling in.. It seems ideal except I need to export obj files.. I found your plugin for this (as well as a couple of others on this site for other things). Problem is being a nub to all this plugin stuff I am not sure if I am installing this one right or I am missing something.. The others I installed ok (I think) as had no problem when starting but this one came up with load errors as follows..

            Error Loading File OBJexporter.rb
            C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/OBJexporter.rb:262: syntax error, unexpected '}', expecting ')'
            C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/OBJexporter.rb:276: syntax error, unexpected kEND, expecting ')'
            C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/OBJexporter.rb:280: syntax error, unexpected kEND, expecting ')'
            C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/OBJexporter.rb:801: syntax error, unexpected kEND, expecting ')'
            end#class OBJexporter ###########...
            ^
            C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/OBJexporter.rb:816: syntax error, unexpected $end, expecting ')'

            Not sure what to do now am running windows 7 64 bit system I placed the OBJexporter.rb in the Google8 plugin file where the others were installed.. C:\Program Files (x86)\Google\Google SketchUp 8\Plugins..

            Am I fighting a loosing battle here 😞

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            • C Offline
              chrisjk
              last edited by 21 Feb 2012, 07:52

              TIG,
              Got this from the latest version:-

              Error Loading File OBJexporter.rb
              /Library/Application Support/Google SketchUp 8/SketchUp/Plugins/OBJexporter.rb;262; parse error, unexpected '}', expecting ')'
                          }
                           ^
              /Library/Application Support/Google SketchUp 8/SketchUp/Plugins/OBJexporter.rb;276; parse error, unexpected kEND, expecting ')'
              /Library/Application Support/Google SketchUp 8/SketchUp/Plugins/OBJexporter.rb;280; parse error, unexpected kEND, expecting ')'
              /Library/Application Support/Google SketchUp 8/SketchUp/Plugins/OBJexporter.rb;801; parse error, unexpected kEND, expecting ')'
              end#class OBJexporter ##########################################################
                 ^
              /Library/Application Support/Google SketchUp 8/SketchUp/Plugins/OBJexporter.rb;816; parse error, unexpected $, expecting ')'
              

              Chris

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              • T Offline
                TIG Moderator
                last edited by 21 Feb 2012, 10:01

                Here's v2.3 http://forums.sketchucation.com/viewtopic.php?p=294844#p294844
                Sorry about that 😳 = my fault...
                There was one silly last-minute typo in the file I initially uploaded [rushing to get it out before bedtime!]
                Please try downloading the latest version again...
                The errant single '(' is now correctly a ')' πŸ˜’

                TIG

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                • G Offline
                  gzotti
                  last edited by 21 Feb 2012, 10:29

                  I had seen the error following the Ruby message and fixed it, thanks.

                  My model may indeed have ungrouped geometry on a hidden layer, most likely some ungrouped edges without faces used during construction only, and also typically hidden. Also there are real construction lines, on a usually hidden layer. I am still learning, and may have made some mistakes or things not recommended but possible. However, from the 2.2 export, still one face in a non-mirrored component inside a locked group is missing, and the reported message and behaviour persists. The Pro export in this case has no problems. I can PM you the model to try/bugfix/bulletproof your exporter, if you like.

                  Again the queation, is there any chance the model itself gets modified during the export, as the intermediate message seems to imply?

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                  • T Offline
                    TIG Moderator
                    last edited by 21 Feb 2012, 10:52

                    Have you tried v2.3?
                    Can you PM the SKP so I can test it.
                    Something is adrift...
                    To ensure that any mirrored instances are correctly UVmapped and the faces correctly oriented the latest versions do change the model BUT only temporarily because it 'aborts' the whole operation at the end so any changes are 'undone'.
                    If the exporter fails before completing, then you should close the SKP without saving as there might be un-aborted changes...
                    The change it makes is that the group/instance is exploded to get the orientation/UVmapping the right way round in mirrored cases, and the results are then exported. To avoid clashes with existing geometry, all 'loose' faces are processed first, then erased, together with any unneeded edges. It also erases all 'loose' faces that are either 'hidden' or on an OFF layer [note that it is ill-advised to layer 'raw' geometry - only give layers to groups/instances! Raw geometry belongs on Layer0] before it looks at groups and instances. Therefore there ought to be no faces to 'clash' ? After each instance is processed its faces are erased too, so any exploded instances should always arrive in a 'clean' context ?

                    TIG

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                    • T Offline
                      TIG Moderator
                      last edited by 21 Feb 2012, 12:33

                      Here's v2.4 http://forums.sketchucation.com/viewtopic.php?p=294844#p294844
                      It has again been recoded. πŸ˜’
                      The processing time is now back to very near v1.8's, but the flipped-instance face-reversal is still fixed...
                      Feedback please...

                      TIG

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                      • G Offline
                        gzotti
                        last edited by 21 Feb 2012, 13:00

                        OK, the missing face is now here, but some components are misplaced. Getting close...

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                        • T Offline
                          TIG Moderator
                          last edited by 21 Feb 2012, 14:06

                          v2.5 is underway...

                          TIG

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                          • T Offline
                            TIG Moderator
                            last edited by 21 Feb 2012, 16:56

                            Here's v2.5 http://forums.sketchucation.com/viewtopic.php?p=294844#p294844
                            It has again been recoded - to resolve nested [flipped] group/instance transformations and other multiple-group-instances glitches etc. The speed is also much improved...
                            Feedback please...
                            πŸ˜•

                            TIG

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                            • B Offline
                              Bazza
                              last edited by 21 Feb 2012, 22:00

                              Hi TIG,

                              I have installed v2.5 and there was no error message on load up so I tried exporting a test model I had made and it exported fine and textures were ok also..
                              Thanks so much for this plugin and also for the speed fix.. Much appreciated πŸ‘

                              Barry

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                              • T Offline
                                TIG Moderator
                                last edited by 22 Feb 2012, 10:54

                                I also have a few more tweaks almost ready - including a ~5% speed improvement and a more Pro-like MTL, with default specularity presets etc.
                                I am currently looking at a weirdness created if you have mirrored [scale -1] instances/groups nested inside mirrored instances/groups, that are then rotated etc πŸ˜’ - these OBJ faces can be incorrectly 'reversed' and the UVmapping messed up... It's unlikely to affect many users BUT I'd like it fixing... πŸ€“

                                TIG

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                                • T Offline
                                  TIG Moderator
                                  last edited by 22 Feb 2012, 19:19

                                  Here's v2.6 http://forums.sketchucation.com/viewtopic.php?p=294844#p294844
                                  Recoded for a speed improvement ~5%.
                                  Flipped/rotated instances' transformations resolved for consistently correct face orientation...
                                  The MTL now defaults to match the Pro exporter generally - specularity=0.333, but now ambience=color etc.
                                  I am hopeful this now fixes the major issues πŸ˜•

                                  TIG

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                                  • G Offline
                                    gzotti
                                    last edited by 22 Feb 2012, 20:04

                                    Yess, finally, a really good exporter - Huge models (forget Pro!), difficult models, I can remove all other half-baked solutions!

                                    I rarely get emoticonal, but Three Cheers to You!

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                                    • M Offline
                                      michaliszissiou
                                      last edited by 28 Feb 2012, 17:01

                                      Great work indeed. TIG, I thank you so much!
                                      Here a test, downloaded from 3dWH. It's a ~1.5M faces mesh, ~20 mterials.
                                      Imported in blender/cycles. Just playing, nothing serious. (yes, I forgot to add transparency on windows glass material) πŸ˜†
                                      A great free solution for rendering BTW. Having the support of blender editor, excellent solution for more organic adds.
                                      CyTestSU.jpg

                                      A question to TIG. Now we're able to export tri meshes only. Obj supports n-gons as well. Will be possible to export like this? As b-mesh is the new implementation to blender. (the new n-gons editor-support)

                                      I mean, SU UI seems to support flat n-gons. Is this true? I'm not convinced. Braking flatness results to tris (show hidden geometry)

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                                      • S Offline
                                        SketchWithHaza
                                        last edited by 4 Mar 2012, 10:02

                                        THANK YOU, you are a life saver. SketchUp is the simplest 3D program I know how to use, finally, ARMA II modding here I come!

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                                        • J Offline
                                          jpalm32
                                          last edited by 4 Mar 2012, 14:22

                                          Thanks! Works great!

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