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    Geometry size not consistent in SU 2015

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    • K Offline
      kaas
      last edited by

      If I'm not mistaken, SketchUp uses inches as internal units. You (and me) use mm's. I think because of the conversion of mm's to inches to mm's, you will most likely see the ~.

      My question though is: do you really need the decimal accuracy when using mm's for your line of work? As an architect I'm happy if the contractor is that accurate. No need for me to worry about decimals when using mm's accuracy.

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      • dereiD Offline
        derei
        last edited by

        @kaas said:

        My question though is: do you really need the decimal accuracy when using mm's for your line of work? As an architect I'm happy if the contractor is that accurate. No need for me to worry about decimals when using mm's accuracy.

        I only REALLY need to get rid of the (~) mark when SU decides to wrongfully approximate my dimensions. The reason why I used so high accuracy was to show the imprecision that I am talking about.
        I don't mind if I have several 1/100mm error, as long as for a 0.0mm accuracy I don't get the (~) symbol in front of my dimension.

        EDIT - and there is not only architecture drawings that SU is used for... other kind of drawings and design use much smaller geometry than a wall.

        DESIGNER AND ARTIST [DEREI.UK](http://derei.uk/l)

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        • cottyC Offline
          cotty
          last edited by

          You draw the wall 12655 mm long and it is dimensioned that way?
          I can't reproduce this... if I create it with that length or scale it to that length, the dimension will reads as "1655,000000mm" in your file (and without the ~ with less accuracy).

          my SketchUp gallery

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          • dereiD Offline
            derei
            last edited by

            @cotty said:

            You draw the wall 12655 mm long and it is dimensioned that way?
            I can't reproduce this... if I create it with that length or scale it to that length, the dimension will reads as "1655,000000mm" in your file (and without the ~ with less accuracy).

            As you can see in my file, there is one 300mm dimension. That remained unchanged. But others change randomly. This is why I submitted this in SketchUp Bug Reporting. And the funny thing, this happened all over my model, not only on this walls. Could be the axis orientation?

            I attached the original file - with the original axis orientation. Is part of a house that has a specific orientation, based on some topographic measurements and terrain.


            the original file, preserving the axis orientation

            DESIGNER AND ARTIST [DEREI.UK](http://derei.uk/l)

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            • Dave RD Offline
              Dave R
              last edited by

              I work at much higher precision than needed for architectural applications and I've never seen SketchUp "randomly" change dimensions. It doesn't matter whether I'm working in imperial or metric units.

              Etaoin Shrdlu

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              • dereiD Offline
                derei
                last edited by

                @dave r said:

                I work at much higher precision than needed for architectural applications and I've never seen SketchUp "randomly" change dimensions. It doesn't matter whether I'm working in imperial or metric units.

                your answer is making the things even stranger... so, I am the only one who encountered this? Again - could be because of axis orientation? is there something wrong with that and I can't figure out?

                DESIGNER AND ARTIST [DEREI.UK](http://derei.uk/l)

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                • Dave RD Offline
                  Dave R
                  last edited by

                  I don't know why axis orientation should affect it. Perhaps it has to do with having length snapping enabled? Try working with it disabled for awhile and see if that has any impact.

                  Etaoin Shrdlu

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                  • dereiD Offline
                    derei
                    last edited by

                    @dave r said:

                    I don't know why axis orientation should affect it. Perhaps it has to do with having length snapping enabled? Try working with it disabled for awhile and see if that has any impact.

                    I actually used numeric input for all dimensions and axis inference. So, length snapping has nothing to do with his. Once I input a size and hit enter, it should go for that size, shouldn't ? The same with push-pull.

                    DESIGNER AND ARTIST [DEREI.UK](http://derei.uk/l)

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                    • Dave RD Offline
                      Dave R
                      last edited by

                      It's the only thing different I see in your Units setup from mine so I thought it worth a try. I never use or want Length Snapping.

                      I should have done this before. Note the x and z coordinates of the end points of the line. The line is a little off axis. I don't know why that is. There are several things that could account for it.
                      Screenshot - 6_13_2015 , 7_52_47 AM.png

                      Etaoin Shrdlu

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                      • dereiD Offline
                        derei
                        last edited by

                        I see that off-axis... can't figure it why either. And is incredibly small displacement too. How can I check is my XYZ axis are perfectly perpendicular? As I said, the model's axis might be modified to align to the topo file.

                        DESIGNER AND ARTIST [DEREI.UK](http://derei.uk/l)

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                        • cottyC Offline
                          cotty
                          last edited by

                          I would follow Daves suggestion and try without the length snapping...

                          my SketchUp gallery

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                          • dereiD Offline
                            derei
                            last edited by

                            @cotty said:

                            I would follow Daves suggestion and try without the length snapping...

                            I'll try that

                            DESIGNER AND ARTIST [DEREI.UK](http://derei.uk/l)

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                            • Dave RD Offline
                              Dave R
                              last edited by

                              I moved the model away from the origin a little to have clear access to the origin and then right clicked on it. If the axes had been changed, Reset would have been black instead of grayed out. There is some tolerance as in any drawing program. Sort of a close enough thing. Maybe you're running into that.

                              Etaoin Shrdlu

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                              • dereiD Offline
                                derei
                                last edited by

                                @dave r said:

                                There is some tolerance as in any drawing program. Sort of a close enough thing. Maybe you're running into that.

                                Maybe. But if that's the case, SU should be fixed by Trimble to properly handle this tolerance. Like not showing the ~ symbol when that's the case. Somehow is reassuring to see that is not so common issue, that means is something that i shouldn't be so concerned for other drawings. But still annoying that i can't figure out why it's happening here.

                                thanks all for the effort. 👍

                                DESIGNER AND ARTIST [DEREI.UK](http://derei.uk/l)

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                                • Dave RD Offline
                                  Dave R
                                  last edited by

                                  Every drawing program has to have some sort of tolerance setting.

                                  It may not help but I don't see the ~ when I reduce the precision.
                                  Screenshot - 6_13_2015 , 8_52_26 AM.png

                                  Etaoin Shrdlu

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                                  • dereiD Offline
                                    derei
                                    last edited by

                                    @dave r said:

                                    Every drawing program has to have some sort of tolerance setting.

                                    It may not help but I don't see the ~ when I reduce the precision.
                                    [attachment=0:1r3zxqoz]<!-- ia0 -->Screenshot - 6_13_2015 , 8_52_26 AM.png<!-- ia0 -->[/attachment:1r3zxqoz]

                                    That's what i was talking about...reducing precision places that strange symbol "~"

                                    DESIGNER AND ARTIST [DEREI.UK](http://derei.uk/l)

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                                    • Dave RD Offline
                                      Dave R
                                      last edited by

                                      Do you see ~ in my screen shot anywhere? I don't see it.

                                      Etaoin Shrdlu

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                                      • Wo3DanW Offline
                                        Wo3Dan
                                        last edited by

                                        There shouldn't be any issue with creating your geometry without ~ and to accurate dimensions.
                                        Dave already mentioned that (some) faces aren't on axes planes.
                                        At some stage you may have inadvertently moved some geometry slightly off axis.

                                        Use the 'Tape Measure' tool > disable the +sign by hitting [Ctrl] once > click on a large face with the tool to fix its starting point > orbit to get the axis color perpendicular to that face > now also hold down [Shift] and see how the values change when measuring locations on that face where they all should read 0.000000

                                        I recreated your geometry next to yours, only relying on SketchUp's inferencing engine and estimated (your model) lengths to input. See attached model.


                                        Component_134_duplicated.skp

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                                        • Dave RD Offline
                                          Dave R
                                          last edited by

                                          Thinking about this reminds me that another member had a similar issue a few years ago. Turned out he had managed to get things off axis somehow. It was only slightly but enough to show in the dimensions.

                                          Etaoin Shrdlu

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                                          • pbacotP Offline
                                            pbacot
                                            last edited by

                                            So if your object is not orthogonal it cannot have accurate dimensions? Really?

                                            MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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