sketchucation logo sketchucation
    • Login
    โ„น๏ธ Licensed Extensions | FredoBatch, ElevationProfile, FredoSketch, LayOps, MatSim and Pic2Shape will require license from Sept 1st More Info

    [Tutorial] SketchUp Ruby C Extension

    Scheduled Pinned Locked Moved Developers' Forum
    176 Posts 16 Posters 25.9k Views 16 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.
    • 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.

      1 Reply Last reply Reply Quote 0
      • 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

        1 Reply Last reply Reply Quote 0
        • Dan RathbunD Offline
          Dan Rathbun
          last edited by

          OK.. my bad.. N/M

          I'm not here much anymore.

          1 Reply Last reply Reply Quote 0
          • 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

            1 Reply Last reply Reply Quote 0
            • 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

              1 Reply Last reply Reply Quote 0
              • 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

                1 Reply Last reply Reply Quote 0
                • 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 โ€” SketchUp Monkey & Coding addict
                  List of my plugins and link to the CookieWare fund

                  1 Reply Last reply Reply Quote 0
                  • 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

                    1 Reply Last reply Reply Quote 0
                    • 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

                      1 Reply Last reply Reply Quote 0
                      • 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.

                        1 Reply Last reply Reply Quote 0
                        • 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 ๐Ÿ˜ž

                          1 Reply Last reply Reply Quote 0
                          • 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.

                            1 Reply Last reply Reply Quote 0
                            • 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!

                              1 Reply Last reply Reply Quote 0
                              • 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 โ€” SketchUp Monkey & Coding addict
                                List of my plugins and link to the CookieWare fund

                                1 Reply Last reply Reply Quote 0
                                • 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 โ€” SketchUp Monkey & Coding addict
                                  List of my plugins and link to the CookieWare fund

                                  1 Reply Last reply Reply Quote 0
                                  • 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.

                                    1 Reply Last reply Reply Quote 0
                                    • Dan RathbunD Offline
                                      Dan Rathbun
                                      last edited by

                                      .. and did you try: require('SX_HelloWorld.so')
                                      (ie, specifying the extension, which should skip the search for a "SX_HelloWorld.rb" file.)

                                      I'm not here much anymore.

                                      1 Reply Last reply Reply Quote 0
                                      • J Offline
                                        jefftrull
                                        last edited by

                                        thomthom, thanks for your help. I've suddenly found a formula that works. The key thing is to use the Ruby built from the one-click installer you reference in the README http://rubyforge.org/frs/download.php/47082/ruby186-27_rc2.exe
                                        I hope it doesn't go away anytime soon (it's no longer listed on their index page) - I'm glad you had the direct link, because using either of the two Ruby builds I made from source (one VS2008, one VS2010) fails.

                                        To answer your questions:

                                        1. yes, it works in irb for all three Ruby builds without problems
                                        2. I did the config.h hack for the one-click version, but for the VS2008 and VS2010 I was able to compile the extension with the same version of VC++ I used to build Ruby itself, so it wasn't necessary... I think?
                                        3. All Ruby versions were 1.8.6-p287, chosen to match SketchUp
                                        4. The apocryph report relates to the need to embed a manifest into the .so file. Following that advice allowed me to compile under VS2008 - under VS2010 no manifest was produced (and its integration was apparently unnecessary)
                                        1 Reply Last reply Reply Quote 0
                                        • J Offline
                                          jefftrull
                                          last edited by

                                          Thanks again for considering this problem of mine, Dan. As you can see from my previous message, it's now working, but I'm still not sure what was wrong.

                                          @unknownuser said:

                                          So (just to be clear:

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

                                          Looks like it. "system properties" says "32-bit operating system"

                                          @unknownuser said:

                                          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 ??

                                          That's an interesting question. I haven't changed anything in the Sketchup program dir, beyond copying the SX_HelloWorld.so into Plugins. What is the significance of those msvcrt* files?

                                          Thanks,
                                          Jeff

                                          1 Reply Last reply Reply Quote 0
                                          • thomthomT Offline
                                            thomthom
                                            last edited by

                                            Ah, so you initially used a Ruby version you built yourself?
                                            I don't really know what makes the difference there. I just tried to find a minimum work solution - so I started out with a pre-built Ruby.

                                            @jefftrull said:

                                            1. I did the config.h hack for the one-click version, but for the VS2008 and VS2010 I was able to compile the extension with the same version of VC++ I used to build Ruby itself, so it wasn't necessary... I think?

                                            Dunno - you might not need it if you built Ruby yourself. The version you had might not have that check in it. With the pre-built version I used I had to remove that check otherwise it would not compile.

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

                                            1 Reply Last reply Reply Quote 0
                                            • 1
                                            • 2
                                            • 3
                                            • 4
                                            • 5
                                            • 6
                                            • 7
                                            • 8
                                            • 9
                                            • 4 / 9
                                            • First post
                                              Last post
                                            Buy SketchPlus
                                            Buy SUbD
                                            Buy WrapR
                                            Buy eBook
                                            Buy Modelur
                                            Buy Vertex Tools
                                            Buy SketchCuisine
                                            Buy FormFonts

                                            Advertisement