force ( neighbors boid behavior -- force )

Vocabulary

boids.simulation

Inputs

neighbors	an object
boid	an object
behavior	an object

Outputs

force

an object

Definition

IN: boids.simulation

GENERIC: force ( neighbors boid behavior -- force )

Methods

USING: accessors boids.simulation kernel math.vectors sequences
;

M: alignment force 2drop [ vel>> ] map vsum normalize ;


USING: accessors boids.simulation kernel math.vectors sequences
;

M: cohesion force
    drop [ [ pos>> ] map vavg ] [ pos>> ] bi* v- normalize ;


USING: accessors boids.simulation kernel math.vectors sequences
;

M:: separation force ( neighbors boid behavior -- force )
    behavior radius>> :> r boid pos>> neighbors
    [ pos>> v- [ normalize ] [ r v/n ] bi v- ] with map vsum ;