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    Circular motion of a still image

    How To... ?
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    • raha
      raha last edited by

      Hi

      I am using Picture Player and Projector, along with Envelope Generator++ to change the values of horizontal position, vertical position, zoom, etc....
      i can only accomplish this in straight lines....
      my current mission is to pan/tilt/zoom around an image in a 'circular motion'. as if a camera were starting, pointed in one position, and panning in a circle around the image while zooming out at the same time...
      i've tried breaking it down into smaller sections and adding segments to the Envelope Generators, but obviously to have a smooth motion would be impossible to map frame by frame...
      i probably need to be using the Curvature Actor but i'm not quite sure how...
      any advice most appreciated. thanks

      iMac 2.66 GHz Intel Core i5, 8 GB RAM, OS X 10.7.4, Isadora Core 1.3.25

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      • vanakaru
        vanakaru last edited by

        Just add Curvature between Envelope Out and Projector parameters. You can play with its behavior by grabbing and moving the Bezier handles.

        MBP 4.1 & MBP (Retina, Mid 2012) MBP Retina 2017

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        • Skulpture
          Skulpture Izzy Guru last edited by

          Or maybe the wave generator actor... never had to make a circular movement but it will be possible somehow using either vanakaru's suggestion, or mine, or both....

          Graham Thorne | www.grahamthorne.co.uk
          RIG 1: Custom-built PC: Windows 11. Ryzen 7 7700X, RTX3080, 32G DDR5 RAM. 2 x m.2.
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          RIG 3: Apple Laptop: rMBP i7, 8gig RAM 256 SSD, HD, OS X 10.12.12

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          • raha
            raha last edited by

            thanks you guys

            i thought of both those actors -- sometimes it's so time-consuming playing trial and error, that it's just good to be reassured that i'm not wasting my time with the wrong tools! now back at it... : )
            many thanks

            iMac 2.66 GHz Intel Core i5, 8 GB RAM, OS X 10.7.4, Isadora Core 1.3.25

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            • vanakaru
              vanakaru last edited by

              Try feed wave generator or envelope into curvature XY to make track change real time.

              MBP 4.1 & MBP (Retina, Mid 2012) MBP Retina 2017

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              • DusX
                DusX Tech Staff last edited by

                Another possible option, depending on what sort of composition you are creating is to use the 3d rect projector. You can control loads of params, and could easily create the circular motion you are looking for, it would also put the processing onto the gpu leaving you more cpu for other things.

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                • vanakaru
                  vanakaru last edited by

                  @DuscX

                  Are you sure about this: ” it would also put the processing onto the gpu leaving you more cpu for other things.”
                  And I do not see any easy way to create a circular motion in Isadora.
                  Now if I try this in After Effects then nothing could be more easy indeed. I am not sure what @raha project will need in terms of control but I would make a movie in AE with circular motion and manipulate speed and zoom(scale) with Isadora. Then video playback would be on GPU as well and everything may work smoother.

                  MBP 4.1 & MBP (Retina, Mid 2012) MBP Retina 2017

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                  • dbini
                    dbini last edited by

                    2 sine wave generators, identical, apart from one with a phase of 75, and triggered simultaneously will give a circular motion when one is fed to one plane, and the other to a perpendicular plane. i discovered this yesterday when i needed to draw a 2d circle with a point of light.

                    John Collingswood
                    taikabox.com
                    2019 MBPT 2.6GHZ i7 OSX15.3.2 16GB
                    plus an old iMac and assorted Mac Minis for installations

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                    • DusX
                      DusX Tech Staff last edited by

                      @Vanakaru, dbini read my mind. Playing with 2 sine waves can create a number of circular fxs. As far as the GPU that has been my experience, although I have no test data to show.. I can see that my GPU usage meter increases when I use the 3d projectors, while it remains inactive when I use regular projectors.

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                      • DusX
                        DusX Tech Staff last edited by

                        Here's a quick sample of a couple round movements.
                        The first using the regular projector is near a circle, needs a little more tweaking in the curvature actor, but you get the idea.

                        6f0541-circmoves.izz

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                        • Armando
                          Armando Beta Gold last edited by

                          Or you can record mouse x and y position with data array with the mouse and feed movement with position played by data array.

                          Armando Menicacci
                          www.studiosit.ca
                          MacBook Pro 16-inch, 2021 Apple M1 Max, RAM 64 GB, 4TB SSD, Mac OS Sonoma 14.4.1 (23E224)

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                          • vanakaru
                            vanakaru last edited by

                            @Armado

                            I like that. I was thinking of using Data Array Actor and getting data from AE. But this is just great for complex movement.
                            @DusX It works if I change the phase to 75(instead of 50) just like dbini suggested.
                            Geat exercise BTW!

                            MBP 4.1 & MBP (Retina, Mid 2012) MBP Retina 2017

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                            • DusX
                              DusX Tech Staff last edited by

                              Thats funny.. I could have sworn that I saved the file with phases set correctly.. weird.
                              In any case I updated the file just for kicks.

                              6a5f77-circmoves.izz

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                              • raha
                                raha last edited by

                                @vanakaru

                                i ended up getting After Effects and as you said -- so easy! 
                                however, i'm still having trouble smoothly adjusting speed and intensity when i bring the files into Izzy. but i'll start that conversation elsewhere.

                                iMac 2.66 GHz Intel Core i5, 8 GB RAM, OS X 10.7.4, Isadora Core 1.3.25

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