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Animated growing cylinders :How to do ?

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  • M Offline
    MALAISE
    last edited by MALAISE 17 Jul 2008, 16:03

    Hello Guys,

    Have you seen basic.woodworks' last tuto?

    http://www.sketchucation.com/forums/scf/download/file.php?id=11873

    There is an amazing animation in scene "Push-Pull intersecting cylinders "
    Does someone know how he realized this "growing cylinder" effect ?

    At this moment, as we say in France, my teeth are broken attempting to understand
    the making of.
    Thanks for help...
    MALAISE

    La Connaissance n'a de valeur que partagée

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    • R Offline
      remus
      last edited by 17 Jul 2008, 16:11

      I havent watched it, but im guessing he did it with section planes.

      If you make one scene with an active section plane at the bottom of the cylinder, then another scene with an active section plane above the cylinder you should get the growing effect when you switch between the scenes.

      http://remusrendering.wordpress.com/

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      • M Offline
        MALAISE
        last edited by 17 Jul 2008, 16:25

        Hi Remus ! 😉

        You're right with the section story. But the fact is, the whole animation is located in lonely scene... then ??

        MALAISE

        La Connaissance n'a de valeur que partagée

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        • R Offline
          remus
          last edited by 17 Jul 2008, 16:32

          So he does.

          I still reckon you could do it pretty easily with section planes, but in this case it looks like it was done by playing around with camera angles and switching between parallel projection and perspective modes. I could well be wrong though, i'll be intrested to hear how the man himself did it...

          http://remusrendering.wordpress.com/

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          • M Offline
            MALAISE
            last edited by 17 Jul 2008, 17:53

            Hello Remus

            I guess I've discovered the trick. I 've followed yours advices. Secret is lying
            in the animation's settings (scenes transition and scene delay are around 5 s) quite enough low to be seen in progress inside the selected scene

            • in the way you manage scenes properties.
            • the third remark concerns the activation of the toggle section off and on sub tool in section tool.

            Here is an example ( very basic one ! , according to your hints )
            I don't care about top and/or bottom whereas groups have been defined...

            Thanks you for yours friendly posts 👍 👍

            MALAISE 😄
            sorry for that strange written English (Anyway it's always a good exercice !) 😉


            basic animated growing cylinder

            La Connaissance n'a de valeur que partagée

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            • E Offline
              ely862me
              last edited by 17 Jul 2008, 18:26

              hold on a sec. how u make the sections to move?¿

              this is amazing 😄

              i found something here: active cut 😛

              Elisei (sketchupper)


              Before no life was done on Earth it was THE LIFE ITSELF...GOD
              Come and See EliseiDesign

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              • D Offline
                DavidBoulder
                last edited by 17 Jul 2008, 19:06

                Here is link to more complex example of mine from another post. Building columns and skin grow separately.
                http://www.sketchucation.com/forums/scf/download/file.php?id=10591
                http://www.sketchucation.com/forums/scf/viewtopic.php?f=15&t=10423

                --

                David Goldwasser
                OpenStudio Developer
                National Renewable Energy Laboratory

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                • A Offline
                  Alan Fraser
                  last edited by 17 Jul 2008, 19:37

                  This is a very well-known technique. You need two section planes...one at each end of the object you want to "grow"...only one of which can be active at any given time. By using two scenes and having a different section plane active in each scene, you will get the effect that you see. You can limit individual section animations by confining them inside a group. Then you can choreograph which section animations plays at any one time (or simultaneously) by arranging a more complex series of scenes.

                  The model posted with the cylinders is a very nice example of multiple section animations.

                  3D Figures
                  Were you required to walk 500 miles? Were you advised to walk 500 more?
                  You could be entitled to compensation. Call the Pro Claimers now!

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                  • P Offline
                    pilou
                    last edited by 17 Jul 2008, 19:50

                    You have a cool video about that here 😉

                    Frenchy Pilou
                    Is beautiful that please without concept!
                    My Little site :)

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                    • M Offline
                      MALAISE
                      last edited by 18 Jul 2008, 05:14

                      Thanks Friends for all theses infos.. 👍 👍
                      MALAISE

                      La Connaissance n'a de valeur que partagée

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                      • A Offline
                        Alan Fraser
                        last edited by 18 Jul 2008, 06:24

                        It's also worth remembering that section animations do not need to travel in straight lines.


                        section.skp


                        section.jpg

                        3D Figures
                        Were you required to walk 500 miles? Were you advised to walk 500 more?
                        You could be entitled to compensation. Call the Pro Claimers now!

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                        • G Offline
                          Gaieus
                          last edited by 21 Jul 2008, 08:53

                          Here is a tut on section plane animations:
                          By Martin: http://www.sketchucation.com/forums/scf/viewtopic.php?f=19&t=633
                          and a "joke" by him in the same thread: http://www.sketchucation.com/forums/scf/viewtopic.php?p=29295#p29295

                          Gai...

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                          • D Offline
                            DavidBoulder
                            last edited by 21 Jul 2008, 17:56

                            Another interesting section animation I did showed 2nd floor of my house in perspective. Then I started moving the camera down and at the same rate moved the section plane down (from scene to scene). The end result looks like the section plane is stationary and someone is pushing the model up into the section plane where it dissolves.

                            Ends up being pretty cool effect.

                            --

                            David Goldwasser
                            OpenStudio Developer
                            National Renewable Energy Laboratory

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