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Flocking Simulation with Phoenix Channels

Christian Bäuerlein
April 19, 2018
Programming
1
200

Flocking Simulation with Phoenix Channels

Code can be found here: https://github.com/fabrik42/flocking_elixir

Christian Bäuerlein

April 19, 2018
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Transcript

  1. Flocking Simulation
    with Phoenix Channels

    View Slide

  2. Flocking Theory

    View Slide

  3. View Slide

  4. Use case: Cinematic effects

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  5. Boid: One member of a flock

    View Slide

  6. * Location

    View Slide

  7. * Location
    * Perception Radius

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  8. * Location
    * Perception Radius
    * Velocity
    * Heading

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  9. You Need Three Behaviours

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  10. 1. Cohesion

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  11. 1. Cohesion

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  12. 1. Cohesion

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  13. 2. Alignment

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  14. 2. Alignment

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  15. 2. Alignment

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  16. 3. Separation

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  17. 3. Separation

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  18. 3. Separation
    !
    !

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  19. 3. Separation
    !
    !

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  20. * Cohesion
    * Alignment
    * Separation
    = Next move

    View Slide

  21. Architecture

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  22. Phoenix
    BoidsChannel
    Receives Updates
    Changes Settings
    GenServer
    WorldStateUpdater
    Calling itself 

    30 times per second
    Simulation
    Calculates new
    positions
    per boid based
    on world state
    Renderer
    Renders updated
    world state
    Socket Connection
    Receives Updates
    Changes Settings

    View Slide

  23. Demo Time!

    View Slide

  24. Read on!
    http://harry.me/blog/2011/02/17/neat-algorithms-flocking/
    http://www.red3d.com/cwr/boids/

    View Slide