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<!doctype html>
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<title>instructions</title>
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<pre id="pre"><u>function parameters</u>
w, h, x, y
t = current time (ms)
d[] = imageData array
r, g, b, a = color values
mousex, mousey
<u>Math aliases</u>
floor, ceil, round
abs, sign, mod(n,m)
pow, exp, sqrt
cos, sin, tan
acos, asin, atan, atan2
random()
E, PI, PHI
<u>convenience functions</u>
clamp(n,min,max)
mix(n,a,b) (lerp)
step(a,b)
smoothstep(n,a,b)
avg(m,n,a)
cosp, sinp (mapped to [0,1])
pixel(x,y) == 4*(y*w+h)
dist(x,y,a,b)
angle(x,y,a,b)
rand(n), randint(n)
choice(array)
deg(radians), rad(degrees)
<u>set pixel color</u>
rgb(r,g,b)
rgbref([rgb])
black() white() red()
gray(n)
<u>color spaces</u>
rgb2xyz(rgb)
xyz2rgb(xyz)
xyz2hunterlab(xyz)
hunterlab2xyz(Lab)
xyz2cielab(xyz)
cielab2xyz(Lab)
rgb2hsl(rgb)
hsl2rgb(hsl)
rgb2cmy(r,g,b)
cmy2rgb(cmy)
cmy2cmyk(cmy)
cmyk2cmy(cmyk)
(not all have been tested)
</pre>
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