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    Roof faces and materials problem

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    sketchup
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    • V Offline
      Voder Vocoder
      last edited by

      Steve6,

      Are you designing something like this?

      http://maps.pomocnik.com/img/photos/krzywy_dom_front_2.jpg

      ~Voder

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      • S Offline
        steve6
        last edited by

        No--it's from an architect's plans. It's a very complex series of roofs, all at different heights, with some pitch changes, etc. This is why SU sees it as non-planar, but I have to find a way to make faces without the hidden lines showing up when I add the materials.

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        • R Offline
          REGIS
          last edited by

          Is this one looks good for you steve6
          roofsketchucation.skp

          It appears that your face is not coplanar, you've got to project the roof(s lines on a coplanar face.

          cheers

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          • S Offline
            steve6
            last edited by

            It is non-planar, btu that's the way it is!

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            • R Offline
              REGIS
              last edited by

              So you've got to use projected texture to get the texture right.

              BTW I don't understand why your roof can't be coplanar. Perhaps it's a special curved roof ❓

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              • R Offline
                REGIS
                last edited by

                I would like to see the entire roof coming with the walls to be sure the roof can't be coplanar.

                I've superposed your roof (white) and the modification I made on and after measurements, the difference is very difficult to notice by eye at the real scale in the real life.
                captroof 1.jpg
                captroof 2.jpg

                Perhaps I'm wrong on the entire roof I wouldlike to be sure.

                regards

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                • S Offline
                  steve6
                  last edited by

                  I don't know how to use the projected texture--please explain.

                  The problem with the roof on this house is that it intersects various additions at differing heights. Maybe what I should have done was to construct the main roof first and then add the various intersecting roofs to it.

                  But this particular roof runs down into a chimney saddle (which has its own angle and corresponding pitch change, then changes pitch a bit as it runs down the side of the chimney itself. So SU doesn't see it as co-planar.

                  I just figured out the Projection Tool--it works very well! But on one of the stitched faces it slanted the material, so I could use a few tips if you have some.

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                  • R Offline
                    REGIS
                    last edited by

                    Perhaps there's some minor corrections to had to get it coplanar.

                    You can post some pics or the entire roof to see what it's possible to do, if you want.
                    different heights on the roof it's not a problem.

                    regards.

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                    • S Offline
                      steve6
                      last edited by

                      I will post my latest attempt. As you can see, there is a problem where the chimney saddle hits the two roof intersections--SU wants to make it a different plane.


                      roofproblem.skp

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                      • Jean LemireJ Offline
                        Jean Lemire
                        last edited by

                        Hi Steve6, hi folks.

                        The two main roof panels in your model are not coplanar. They are warped.

                        Also, their junction is not a junction since there are gaps all along. Zoom closely in and you will see.

                        One more problem, you are creating a pocket near the base of the chimney that will accumulate water or melted snow unless you provide a drain. This pocket will eventually get full of debris like fallen leaves and whatever.

                        Just ideas.

                        Jean (Johnny) Lemire from Repentigny, Quebec, Canada.

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                        • R Offline
                          REGIS
                          last edited by

                          Hi

                          I agree with Jean Lemire, There is ton of problems, there's a problem with inference axe too and perhaps it's due to the way you model it. (I don't want to hurt you saying that).

                          Steve6, share the plan and we could try with it and sure we share with you the "how to" get a nice result.

                          Here's just an idea with different pitch
                          idea roof.skp

                          regards

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                          • S Offline
                            steve6
                            last edited by

                            What I have drawn is the roof as the architect has it (this is a very common situation in roofs on large houses). The problem seems to be that SU is confused by the saddle. The two roof planes intersect and the saddle is between them, so SU sees this pitch change as a separate plane and wants to make it flat. There is a lot of hidden jumk geometry from all my attemps to overcome SU! I can't redraw what the architect has, so I need to find a way to make it work!

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                            • Jean LemireJ Offline
                              Jean Lemire
                              last edited by

                              Hi Steve6, hi folks.

                              Then tell your architect that is geometry is flawed and that nothing can be done with that. Show him the model and :

                              1 - Orbit the model that you sent to look at the two main roof panels as close as possible from their respective side. A coplanar panel will show as a line. The panels in your model wont show as lines since they are warped.

                              2 - Try to zoom very close to the junction between the two main panels, especially at its lowest part. You will see that it is open. The gap is very small but it is there. The fact that the junction is showned as profiles is a good indication that there is a problem there. Otherwise, it would show with a thin line.

                              I still stand on my opinion that creating a pocket at the base of the chimney is not a good idea.

                              Just ideas.

                              Jean (Johnny) Lemire from Repentigny, Quebec, Canada.

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                              • S Offline
                                steve6
                                last edited by

                                The architect's geometry is fine. The two roofs intersect at the bottom of the valley, and the saddle is, in effect, its own roof with a different slope. My drawing is at fault because it's the result of many tries to overcome SU not liking the pitch changes! Maybe what I should do is to draw the two main roofs, and then draw the saddle separately and add it on top.

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                                • R Offline
                                  REGIS
                                  last edited by

                                  @ steve6

                                  Like I said before, if you need help, I'll be pleased to help you.

                                  regards

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