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    [Plugin] GreyscaleMode

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    • utilerU Offline
      utiler
      last edited by

      You're right Jim, that's the only thing that restricts it from being a 'face style' option. It would be nice to be able to "update scene" individually rather than a ruby that effects the model period....but that takes away from the "reverse color" option....

      I guess if this was a face style and we wanted to 'spot color' an element, we could set up diferent components and scenes then import into Layout and overlay scenes.....a round about way of doing things though and getting into another topic, 'more than one style in a drawing / file'.

      Five Star, Jim.

      purpose/expression/purpose/....

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      • Z Offline
        zed252000
        last edited by

        πŸ‘Š
        this is just Awesomely Good.
        Thanks!

        Whatever we IMAGINE....

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        • J Offline
          Jim
          last edited by

          Hi Guys,

          A word of caution; utiler has reported he was not able to get the right-click "revert" color option using this plugin. I'm not sure why, but it may mean that the script could "forget" your original material colors. I'm looking into it.

          EDIT: There is no danger of loosing the original colors. The error was caused because the default color returns nil when asked for its material.

          Hi

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          • Dave RD Offline
            Dave R
            last edited by

            Jim,

            Thanks for the warning. I haven't seen that problem but I'll keep my eyes open and let you know.

            Dave

            Etaoin Shrdlu

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            • Didier BurD Offline
              Didier Bur
              last edited by

              Hi,
              This happens when the face has default material, here is the error message:
              Error: #<NoMethodError: undefined method `get_attribute' for nil:NilClass>

              because in the code, line 16:
              material = sel.material -> equals nil when no material on face
              then line 18:
              rgb = material.get_attribute("GreyScaleColors", 'rgb')
              get_attribute method can be used on nil πŸ˜‰ and then no context menu.
              This would be better:

              
              if sel.typename == "Face" and sel.material
                  material = sel.material
                  ...
              

              @unknownuser said:

              it may mean that the script could "forget" your original material colors

              This is impossible IMHO... Attributes on non-geometric objects such as layers and materials, once set, cannot be accessed by the user, lost, erased, or forgotten, unless the script itself does erase them.

              Last note: I've been told that (red+green+blue)/3 does not give an exact gray value. What Gimp or PS do to desaturate an image for instance is:

              gray_value=([red,green,blue].max + [red,green,blue].min)/2.0

              Sketchup::Color.new( gray_value, gray_value, gray_value )

              My 2 cts (of Euros πŸ˜„ )

              DB

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              • J Offline
                Jim
                last edited by

                The plugin goes through all in-model materials and changes them to a grey value. The default face color is completely ignored as it does not appear in the in-model materials list, and this is when the material is nil.

                So the question is, should the plugin also change the default face color to a grey value?

                Does anyone have a preference for how the greyscale value is calculated? If not, I will try the method suggested by Didier.

                Thanks, Didier for taking the time to help.

                Hi

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                • utilerU Offline
                  utiler
                  last edited by

                  I never export images, etc from SU with the default face color. In fact if we did this in grey scale without adding additional color to the scene then grey scale would be a constant....

                  Here is another nice example of grey scale output. [not mine]


                  2045982887_section-aa.jpg

                  purpose/expression/purpose/....

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                  • Dave RD Offline
                    Dave R
                    last edited by

                    I guess I'm not too picky about how the grays are determined. At this point the average of the RGB values seems to work fine but if there's another option, I'm willing to go that way. As far as the default material being turned to a gray, perhaps it could be left alone? THis would make it easier to identify faces that haven't been given a material.

                    Etaoin Shrdlu

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                    • utilerU Offline
                      utiler
                      last edited by

                      True Dave, the default color can go it alone....

                      As for grey scale variation, If we didn't have variation i think it would shade quite bland IMHO...

                      purpose/expression/purpose/....

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                      • Dave RD Offline
                        Dave R
                        last edited by

                        Andrew, you have a point about the potential for blandness. (I think I just made up a word.)

                        I'm sure it would add to the complexity of the plugin but suppose one could choose some sort of filter factor. Suppose that you want to simulate a 25 Red filter. You might choose Red from a list of filters which would give green colors lower values (make them darker) while reds would tend to be higher values. This would give you the ability to tune the grays to prevent some colors from being too close together on the gray scale.

                        Etaoin Shrdlu

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                        • Dave RD Offline
                          Dave R
                          last edited by

                          Here's another example of using the Grayscale Plugin. This is raw SU output.

                          http://img.photobucket.com/albums/v506/weekender410/RBT.jpg

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                          • utilerU Offline
                            utiler
                            last edited by

                            Awesome Dave!!!

                            purpose/expression/purpose/....

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                            • Dave RD Offline
                              Dave R
                              last edited by

                              Thank you Andrew. There's not much color in this model anyway but I like the effect with the grey scale option. I like that the wood grain still shows this way, too.

                              Etaoin Shrdlu

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                              • plot-parisP Offline
                                plot-paris
                                last edited by

                                @dave r said:

                                ...but suppose one could choose some sort of filter factor. Suppose that you want to simulate a 25 Red filter. You might choose Red from a list of filters which would give green colors lower values (make them darker) while reds would tend to be higher values.

                                do I understand it correctly that with this method you could even create a sepia effect (with some colours standing out of course πŸ˜‰ ). that would be such a cool thing!

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                                • Dave RD Offline
                                  Dave R
                                  last edited by

                                  I hadn't thought of it that way but I suppose since we're asking for the moon...

                                  I was really thinking more of "filters" for controlling values of gray to preventtwo adjacent colors from looking like the same value of gray. I'm sure you've seen the example from the old photography texts of the red, green and yellow apples shot through different colored filters on black and white film. I tried to find that photo in a quick Google search but came up empty.

                                  Etaoin Shrdlu

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                                  • J Offline
                                    Jim
                                    last edited by

                                    @dave r said:

                                    I hadn't thought of it that way but I suppose since we're asking for the moon...

                                    I was really thinking more of "filters" for controlling values of gray to preventtwo adjacent colors from looking like the same value of gray. I'm sure you've seen the example from the old photography texts of the red, green and yellow apples shot through different colored filters on black and white film. I tried to find that photo in a quick Google search but came up empty.

                                    I'm sure it can be be done, although I don't know the math involved in filtering/masking colors. To combine the ideas, a set of filter settings could be saved as a preset - named Sepia, or Black & White, as examples.

                                    off to day job... later.

                                    Hi

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                                    • M Offline
                                      Matt666
                                      last edited by

                                      @unknownuser said:

                                      or Black & White,
                                      Hey !! That is exactly what I wanted to ask !! πŸ˜„ β˜€
                                      The same render that "Hidden lines" tool of the "Face Style" Toolbar... But we can color some entities !!!
                                      Great 😍 😍
                                      Thank you Jim !

                                      Frenglish at its best !
                                      My scripts

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                                      • utilerU Offline
                                        utiler
                                        last edited by

                                        wow, this is becoming bigger than i thought....

                                        purpose/expression/purpose/....

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                                        • D Offline
                                          DonVid
                                          last edited by

                                          Greetings Jim:

                                          This plugin is a great addition. We can now insert
                                          a pdf from Lay Out and import it into cad programs
                                          like Vector and make a BW presentation on the actual
                                          Construction Documents.

                                          Thanks,

                                          DonVid


                                          Constr. Docs.1.pdf

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                                          • utilerU Offline
                                            utiler
                                            last edited by

                                            too right Jim, and nice work.
                                            this little script portrays a nice soft presentation to both schematic and final design....

                                            purpose/expression/purpose/....

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