43 lines
951 B
Scheme
43 lines
951 B
Scheme
(define particle-count 10000)
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; init one particle
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(define (init n)
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(pdata-set "p" n (vector 0 0 0))
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(pdata-set "vel" n (vmul (vsub (vector (flxrnd) (flxrnd) (flxrnd))
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(vector 0.5 0.5 0.5)) 0.1))
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(pdata-set "c" n (vector (flxrnd) (flxrnd) 1)))
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; init some random particles
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(define (initsome n)
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(cond ((not (zero? n))
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(init (random particle-count))
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(initsome (- n 1)))))
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(define (animate)
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(with-primitive particles
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(initsome 100)
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; pdata-ops are a bit like simple pfuncs -
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; they are both similar experiments, pfuncs
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; will be the way it works in the future
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(pdata-op "+" "vel" (vector 0 -0.002 0))
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(pdata-op "+" "p" "vel")))
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(clear)
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(show-fps 1)
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(hint-none)
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(hint-points)
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(point-width 4)
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(hint-anti-alias)
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(define particles (build-particles particle-count))
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(with-primitive particles (pdata-add "vel" "v"))
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(blur 0.1)
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(every-frame (animate))
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