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Example

Flying Free Comments on Craig W. Reynolds’ Flocks, Herds, and Schools: A Distributed Behavioral Model Cailin K. Andruss Virginia Commonwealth University NSF BBSI Program 2005 - 2006. Example. Example. 100. Example. 100. Example. 100. Example. 100. Example. 100. Example. 100. 200.

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  1. Flying FreeComments on Craig W. Reynolds’Flocks, Herds, and Schools: A Distributed Behavioral ModelCailin K. AndrussVirginia Commonwealth UniversityNSF BBSI Program 2005 - 2006

  2. Example

  3. Example 100

  4. Example 100

  5. Example 100

  6. Example 100

  7. Example 100

  8. Example 100 200

  9. Example 100 200

  10. Can a flock of birds be modeled without individually programming each bird’s path?

  11. Natural Flocking • Millions of herring can travel in schools spanning 17 miles just as easily as a dozen birds can form a flock for a brief flight. • If flocking ability is independent of flock size, how do the flocks coordinate?

  12. The Secret: The Neighborhood Based on a Diagram by Craig Reynolds

  13. Acceleration Requests • Collision Avoidance: Stay clear

  14. Acceleration Requests • Collision Avoidance: Stay clear • Velocity Matching: Stay on track

  15. Acceleration Requests • Collision Avoidance: Stay clear • Velocity Matching: Stay on track • Flock Centering: Stay close Diagrams by Craig Reynolds

  16. The Brick Wall

  17. The Brick Wall

  18. The Brick Wall • Prioritize the acceleration requests. • Set a maximum acceleration. • Allow acceleration up to the maximum with the highest priority request getting first dibs.

  19. The Brick Wall • Prioritize the acceleration requests. • Set a maximum acceleration. • Allow acceleration up to the maximum with the highest priority request getting first dibs.

  20. The Brick Wall • Prioritize the acceleration requests. • Set a maximum acceleration. • Allow acceleration up to the maximum with the highest priority request getting first dibs.

  21. The Result (click here for movie)

  22. Take Home Message • The secret: Limit vision of boid to neighborhood • Boids follow three rules: 1. Collision avoidance 2. Velocity matching 3. Flock centering • More urgent rules receive priority

  23. Application to VPP • The Virtual Parasite Project uses swarming to model parasite activity. • The accuracy of theories about their activity can be tested. • Experiments can be performed more quickly in silico than in vitro.

  24. References Reynolds, C. W. (1987) Flocks, Herds, and Schools: A Distributed Behavioral Model, in Computer Graphics, 21(4) (SIGGRAPH '87 Conference Proceedings) p. 25-34. Acceleration Request diagrams from Craig Reynold’s Boid’s Page: http://www.red3d.com/cwr/boids/ Thanks to Jeff Elhai for help with dewordification

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