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Beyond the Basics Gradient spirals using Inkscape
  1. #1
    fewerjunk fewerjunk @fewerjunk
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    This tutorial got me started.  It uses Illustrator:

    https://www.youtube.com/watch?v=VNE4dq9_HeU

    That led me to this: (Inkscape):

    https://www.youtube.com/watch?v=EKxz9LRei08
     

    and this as a possible method involving booleans to remove the first seven of eight and using the Inkscape tut’s methods to rotate the sliver comparable to the Illustrator tut:

    https://www.youtube.com/watch?v=zULrMqzxZ1I

    My problem is it’s hand drawn and I’m guessing there’s a way to translate the process from hand drawn to digitally drawn.
     

    Or… something completely different?

    Any ideas?

  2. #2
    Tyler Durden Tyler Durden @TylerDurden

    The spiral gradients are a known technique...

    Lazur and others have shared examples.

    The Zen/compass is not so difficult:

    The duplicate button is just offscreen at the top. (oops)

  3. #3
    fewerjunk fewerjunk @fewerjunk
    *

    Tried searching for "Lazur", "gradient spirals" and "spiral gradients" coming up with nothing but my topic.  

    Searched on Youtube.  Found this:

    https://youtu.be/Kp-EwSsCSeA

    Close.

    Also this:

    https://www.youtube.com/watch?v=emStNzBqPIU

  4. #4
    Tyler Durden Tyler Durden @TylerDurden
    *

    Not sure if this is what you're looking for, but maybe this:

    (a bit crude)

    Make the circles:

    This illustration uses:

    • Snapping to guides, object centers, bounding box corners
    • Opacity controls
    • Duplicating objects
    • Scale transforms with proportional and center
    • Align on horizontal
    • Rotate transforms with Alt key for increments

     

    Inkscape doesn't have the shape builder (but soon), so here's how to extract the swirl:

    This illustration uses:

    • Technique to create separate objects from overlapping paths: 
      • Path>Combine
      • New object sent to back
      • Path>Division
      • Remove outside object
    • Alt-drag technique to "touch-select" objects
    • Path>Union

     

    Applying the gradient to the swirl and duplication:

    This illustration uses:

    • Relocate/ snap to rotation centers
    • Duplicate and rotate 90 degrees
    • Unlinked linear gradients

     

  5. #5
    fewerjunk fewerjunk @fewerjunk

    Haven’t tried this yet.  Looks promising.

  6. #6
    Lazur Lazur @Lazur

    Thank you for the mention @TylerDurden!

     

    @fewerjunk: always found spirals interesting.

    Contrary the fast and sloppy results in the videos above had revisited the concept time to time with giving days to each session. 

    My approach was shaped largely by the rendering gap issue from anti-aliasing. 

    Where objects share the exact same geometry at neighboring edges, there is always athin line in the rendering. 

    One of my main goals is to avoid that with overlapping the paths atop eachother. 

    So I wouldn't use the shapebuilder tool even if it was available. Another reason for not using it is that Boolean operations are sloppy. 

    Especially if you are constructing with circles. 

    I know those are nit picking details but I'm aiming for the most accurate solutions. 

     

    Here is an example image that took way too long to admit back in 2017:

    https://www.deviantart.com/lazururh/art/ring-planet-720756888

    Instead connecting the outer and inner circles with another circle I was playing with the idea of using a circle evolvent, changing the radii along the curve constantly.

    Then comes the visual approach, what kind of gradients and filters to use. 

    Generally, using tiles that are overlapping with only a thin part showing. Each tile has a linear gradient set. 

    This way, instead of dealing with a mesh gradient and constant node colour tweaking that custom shaped gradient (built from many individual pieces) can be changed by editing one gradient definition only.

     

    Having said that, the compass and pencil video can be recreated by using interpolation path effect in minutes.

     

     

    Can you elaborate on your design goals here?

     

  7. #7
    fewerjunk fewerjunk @fewerjunk
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    @Taylor

    Screws up on combine every time.  Keep getting the dimensions and the snapping wrong.

     

     

  8. #8
    fewerjunk fewerjunk @fewerjunk

    ex.

     

  9. #9
    Tyler Durden Tyler Durden @TylerDurden

    Care to share the svg?

  10. #10
    fewerjunk fewerjunk @fewerjunk

    SVG:

     

    Gradient Swirl Inkscape Durden2 Svg
  11. #11
    Tyler Durden Tyler Durden @TylerDurden
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    The white areas might not be an issue.

    But for combining and running the boolean, the misplacement of each pair will probably mess things up.

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