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    [Plugin] GreyscaleMode

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    • D Offline
      drewpoeppel
      last edited by

      Thanks a ton this is VERY helpful.

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      • G Offline
        gaucho
        last edited by

        Good stuff Jim, thanks!

        "eat well, stay fit, die anyway..."

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        • S Offline
          sepo
          last edited by

          Nice ...It renders black and white in Podium but keeps the colour of the sky ( i presume ground as well)
          It would be nice to be able to choose say one colour which could stay as colour ...
          Thanks Jim ....

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          • Dave RD Offline
            Dave R
            last edited by

            Sepo, after making the model all grey, right click on a face containing the color you wish to show. Choose Revert color from the menu. 😉

            Etaoin Shrdlu

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            • S Offline
              sepo
              last edited by

              Aha...cheers Dave did not pick that up...Cool. Any chance to actually have more than 10 shades of grey. That would make renders nicer.

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              • Dave RD Offline
                Dave R
                last edited by

                As I understand it, Jim's method of creating the gray values is to average the RGB values and apply that number to all of the RGB settings. I don't think we're limited to 10 steps as was discussed in the other thread.

                Etaoin Shrdlu

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                • S Offline
                  sepo
                  last edited by

                  Actually I think you are correct ... discard the last bit 😉

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                  • utilerU Offline
                    utiler
                    last edited by

                    @unknownuser said:

                    I like it and thanks, but can't this be done using a Style?

                    I agree, Coen. A face style. That way we could save it to styles and scenes.....

                    It wound allow us to 'revert color' in a style / scene though I wouldn't think..... Jim?

                    purpose/expression/purpose/....

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                    • Z Offline
                      zed252000
                      last edited by

                      TY " You're Good !!"

                      Whatever we IMAGINE....

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                      • J Offline
                        Jim
                        last edited by

                        @utiler said:

                        @unknownuser said:

                        I like it and thanks, but can't this be done using a Style?

                        I agree, Coen. A face style. That way we could save it to styles and scenes.....

                        It wound allow us to 'revert color' in a style / scene though I wouldn't think..... Jim?

                        Thanks and you're welcome, everyone.

                        Having it work as a Face Style would be nice. Face Styles can be selected in Ruby by setting an option called the RenderMode. There is just not a way to create a new Face Style that I can see.

                        Like Dave said, I don't think a Style is an option either. There is no control over individual colors in a Style.

                        The idea of saving material changes between Scenes is a completely separate plugin...

                        Hi

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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

                            👊
                            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 😉 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 😄 )

                                  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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