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boids: fix wrap-pos to wrap at row/col 511 instead of 510.

clean-macosx-x86-32
John Benediktsson 2019-07-26 18:38:08 -07:00
parent 9135c82eb6
commit 4201c2149b
2 changed files with 5 additions and 7 deletions
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2
extra/boids/boids.factor
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@ -26,7 +26,7 @@ CONSTANT: initial-dt 5
: <boids-gadget> ( -- gadget )
boids-gadget new
t >>clipped?
${ width height } >>pref-dim
${ WIDTH HEIGHT } >>pref-dim
initial-population random-boids >>boids
initial-behaviours >>behaviours
initial-dt >>dt ;

10
extra/boids/simulation/simulation.factor
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@ -5,8 +5,8 @@ USING: accessors arrays combinators.short-circuit kernel
locals math math.vectors random sequences ;
IN: boids.simulation
CONSTANT: width 512
CONSTANT: height 512
CONSTANT: WIDTH 512
CONSTANT: HEIGHT 512
TUPLE: behaviour
{ weight float }
@ -51,7 +51,6 @@ C: <boid> boid
:: neighbors ( boid boids behaviour -- neighbors )
boid boids [ behaviour within-neighborhood? ] with filter ;
GENERIC: force ( neighbors boid behaviour -- force )
:: (force) ( boid boids behaviour -- force )
@ -59,8 +58,7 @@ GENERIC: force ( neighbors boid behaviour -- force )
[ { 0.0 0.0 } ] [ boid behaviour force ] if-empty ;
: wrap-pos ( pos -- pos )
width height [ 1 - ] bi@ 2array
[ [ + ] keep mod ] 2map ;
WIDTH HEIGHT 2array [ [ + ] keep mod ] 2map ;
:: simulate ( boids behaviours dt -- boids )
boids [| boid |
@ -75,7 +73,7 @@ GENERIC: force ( neighbors boid behaviour -- force )
: random-boids ( count -- boids )
[
width height [ random ] bi@ 2array
WIDTH HEIGHT [ random ] bi@ 2array
2 [ 0 1 normal-random-float ] replicate
<boid>
] replicate ;