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    [Tutorial] SketchUp Ruby C Extension

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    • J Offline
      Jim
      last edited by

      TIG means try using this --> / <-- instead of that --> ** <-- in your require statement.

      Hi

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      • C Offline
        chyn2000
        last edited by

        Ah. Gotchya now.

        Nirg. Same result...

        Anything else? Maybe is one of you guys have successfully built the example you could post it for download. That would make sure I've got my environment set up correctly.

        -Chyn

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        • thomthomT Offline
          thomthom
          last edited by

          How did you build it? Seems something has gotten confused and the path has gotten mixed into the name of the initializing procedure for the C Extension.

          @chyn2000 said:

          LoadError: 127: The specified procedure could not be found. - Init_path_to_project\suext

          It tries to call a function named Init_path_to_project\suext - where, given the name suext it should be trying to call Init_suext.

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

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          • C Offline
            chyn2000
            last edited by

            I built in Pelles C.

            So, the path isn't hard coded in the program. I can place a copy of the suext.so on my d:\ and it changes the error out put to match:

            irb(main):002:0> require 'D:\suext'
            LoadError: 127: The specified procedure could not be found. - Init_D:\suext
            D:\suext.so
            from D:\suext.so
            from d:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
            from (irb):2
            from :0

            Is there a specific directory I should have the file at?

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            • Dan RathbunD Offline
              Dan Rathbun
              last edited by

              %(#BF8000)[path_to_ruby/lib/ruby/site_ruby/1.8/rubygems/**custom_require.rb**]

              Why are you customizing the require() method ?

              Try it WITHOUT loading this custom script...

              I'm not here much anymore.

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              • J Offline
                Jim
                last edited by

                @dan rathbun said:

                Why are you customizing the require() method ?

                He isn't - this is something done by RubyGems.

                Hi

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                • Dan RathbunD Offline
                  Dan Rathbun
                  last edited by

                  OK.. my bad.. N/M

                  I'm not here much anymore.

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                  • J Offline
                    Jim
                    last edited by

                    @chyn2000 said:

                    irb(main):002:0> require 'D:\suext'

                    You did it again.

                    Use:

                    require "D:/suext"

                    
                    irb(main);001;0> require 'C;\SX_Basics'
                    LoadError; 127; The specified procedure could not be found.   - Init_C;\SX_Basics
                    C;\SX_Basics.so
                            from C;\SX_Basics.so
                            from (irb);1
                    irb(main);002;0> require 'C;/SX_Basics'
                    => true
                    irb(main);003;0>
                    

                    Hi

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                    • J Offline
                      Jim
                      last edited by

                      Ok, I just built TBD's suext example using Visual Studio Express 2010.

                      In order to get the extension to require properly, I had to use:

                      require "SUExt" <-- note case

                      require "suext" failed.

                      Hi

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                      • C Offline
                        chyn2000
                        last edited by

                        @jim said:

                        Ok, I just built TBD's suext example using Visual Studio Express 2010.

                        In order to get the extension to require properly, I had to use:

                        require "SUExt" <-- note case

                        require "suext" failed.

                        Yep Jim. That was exactly it!

                        Thanks everyone. Let me know if there is anything I can do to help.

                        Actually, it occurs to me that we may want to start making a small library of math and geometry ruby extensions very targeted towards SU. Thoughts?

                        -Chyn

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                        • thomthomT Offline
                          thomthom
                          last edited by

                          @chyn2000 said:

                          Actually, it occurs to me that we may want to start making a small library of math and geometry ruby extensions very targeted towards SU. Thoughts?

                          Not a bad idea. I had plans of doing some bezier functions.

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

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                          • J Offline
                            Jim
                            last edited by

                            @chyn2000 said:

                            Actually, it occurs to me that we may want to start making a small library of math and geometry ruby extensions very targeted towards SU. Thoughts?

                            Maybe wrapping up an existing library for SketchUp/Ruby would be a way to go? Here's some interesting ones:

                            [1] http://vcg.sourceforge.net/index.php/Main_Page
                            [2] http://www.cgal.org/
                            [3] http://ptex.us/
                            [4] http://code.google.com/p/ruby-sketchup-sdk/
                            [5] http://www.visilibity.org/

                            Hi

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                            • J Offline
                              jefftrull
                              last edited by

                              I was so excited to discover that someone was building Sketchup extensions with Visual Studio 2010 - that's exactly what I need to do - unfortunately, after going through the whole process, I can't seem to successfully load the SX_HelloWorld module:

                              
                              require 'SX_HelloWorld'
                              Error; #<LoadError; C;/Program Files/Google/Google SketchUp 8/Plugins/SX_HelloWorld.so; 126; The specified module could not be found.   - C;/Program Files/Google/Google SketchUp 8/Plugins/SX_HelloWorld.so>
                              (eval)
                              (eval);0
                              
                              

                              Notice this is not a situation where the file is missing - that produces a similar but different error message.

                              After some Googling it seemed like missing .so's are sometimes the culprit, so I tried copying over some from my Ruby build directory (win32ole.so and Win32API.so), but it didn't help. Finally I tried running Sketchup from the VS2010 command line shell - this resulted in the infamous "bugsplat".

                              I'm at my wit's end here... any ideas?

                              Thanks,
                              Jeff
                              PS: My Ruby install gives RUBY_PLATFORM=i386-mswin32_100, RUBY_VERSION=1.8.6; Sketchup gives RUBY_PLATFORM=i386-mswin32 and the same version

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                              • Dan RathbunD Offline
                                Dan Rathbun
                                last edited by

                                FYI: When require loads a shared object library file (and not a ruby script,)
                                the require(filepath) method looks for a C function named:
                                "Init_" + File.basename( filepath, File.extname(filepath) )
                                and runs it after loading the shared library.

                                This means that named C function must exist (even if it does nothing,) and must be named exactly as the file is named (CASE SENSITIVE.) If an enduser renames the so (or dll, dylib, etc.,) file later (including changing the case of any characters,) then loading the library file with require() will fail. (usually resulting in a "entry point not found" error.)

                                I'm not here much anymore.

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                                • J Offline
                                  jefftrull
                                  last edited by

                                  Thanks for the quick response! Unfortunately, I don't think that's the issue, for three reasons:

                                  1. The error message is "The specified module could not be found", rather than "entry point not found"
                                  2. I'm using the example file from bitbucket unchanged... the name of the relevant function there is "Init_SX_HelloWorld", vs filename "SX_HelloWorld.so"
                                  3. I can use this module OK in Ruby standalone (whichever one I built with)

                                  I do think it's got to be something simple... I just can't see what it might be. The error message isn't terribly helpful 😞

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                                  • Dan RathbunD Offline
                                    Dan Rathbun
                                    last edited by

                                    BTW your on Windows 7 ??

                                    Is the path:
                                    %(#BF0080)["C:/Program Files (x86)/Google/Google SketchUp 8/Plugins/SX_HelloWorld.so"]

                                    and what is the result of (at the console):
                                    puts $LOAD_PATH

                                    I'm not here much anymore.

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                                    • J Offline
                                      jefftrull
                                      last edited by

                                      @dan rathbun said:

                                      BTW your on Windows 7 ??

                                      That's right, Windows 7 Professional SP1

                                      @unknownuser said:

                                      Is the path:
                                      %(#BF0080)["C:/Program Files(x86)/Google/Google SketchUp 8/Plugins/SX_HelloWorld.so"]

                                      No, it's "C:/Program Files/Google/Google Sketchup 8/Plugins/SX_HelloWorld.so" (no "(x86)")

                                      @unknownuser said:

                                      and what is the result of (at the console):
                                      puts $LOAD_PATH

                                      
                                      puts $LOAD_PATH
                                      C;/Program Files/Google/Google SketchUp 8/Plugins
                                      C;/Program Files/Google/Google SketchUp 8/Tools
                                      nil
                                      
                                      

                                      Thanks!

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                                      • thomthomT Offline
                                        thomthom
                                        last edited by

                                        @jefftrull said:

                                        1. I can use this module OK in Ruby standalone

                                        Hm... it works in IRB, but not SketchUp?

                                        @jefftrull said:

                                        (whichever one I built with)

                                        Exactly what version of Ruby did you use to build the extension?
                                        Also - did you remember to modify the config.h file as described in the README?

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

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                                        • thomthomT Offline
                                          thomthom
                                          last edited by

                                          The error you report is mentioned in this article: http://apocryph.org/2007/06/16/totally_bullshit_ruby_extension_experience_windows/

                                          However, I did not experience such error... not really sure what the difference is here...

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

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                                          • Dan RathbunD Offline
                                            Dan Rathbun
                                            last edited by

                                            @jefftrull said:

                                            @dan rathbun said:

                                            BTW your on Windows 7 ??

                                            That's right, Windows 7 Professional SP1

                                            @unknownuser said:

                                            Is the path:
                                            %(#BF0080)["C:/Program Files(x86)/Google/Google SketchUp 8/Plugins/SX_HelloWorld.so"]

                                            No, it's "C:/Program Files/Google/Google Sketchup 8/Plugins/SX_HelloWorld.so" (no "(x86)")

                                            So (just to be clear:

                                            1) You installed the 32bit version of Windows 7 ??

                                            2) Are you running Sketchup with the Google supplied "msvcrt-ruby18.DLL" (which is v1.8.6-p287,) or did you replace the "msvcrt-ruby18.DLL" library file in the Sketchup program dir, with the one that you built ??

                                            I'm not here much anymore.

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