Top dweets by u/robbyg

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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    u(t) is called 60 times per second.
    t: Elapsed time in seconds.
    S: Shorthand for Math.sin.
    C: Shorthand for Math.cos.
    T: Shorthand for Math.tan.
    R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5)
    c: A 1920x1080 canvas.
    x: A 2D context for that canvas.

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Current theme challenge: #ScaryMovies

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robbyg

function u(t) {

i=255,t||(X=Array(i).fill(960),Y=Array(i).fill(540));while(i--)x.fillStyle=R(i),x.fillRect(X[i]+=C(z=Math.random()*6.28)*9,Y[i]+=S(z)*9,9,9)

Mar 17 2018 7:59 PM UTC

}// 140/140

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u/joeytwiddle

#virus #outbreak

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robbyg

remix of d/8582 by u/robbyg

function u(t) {

t&&x.drawImage(c,0,3)
for(Z=i=360;i--;x.fillRect(i*18-C(t+t-S(i/9))*Z-Z,0,Z,3))x.fillStyle=`hsl(${(S(i/3+t)+9)*4},${z=25+i%55}%,${z*.8}%)`

Jun 13 2018 1:29 PM UTC

}// 138/140

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Dunes.

u/magna

I bet p01 will come and add a camel to this.
u/lionleaf

Wow, that's really nice! #dunes #sand #desert
u/zanella

But the function names are already in camel case. #rimshot
u/joeytwiddle

#landscape

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robbyg

function u(t) {

c=t?c+4:1;throw p=(t?p:0)+4/c-4/(c+2)

May 29 2019 5:22 PM UTC

}// 37/140

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Calculating #pi based on a formula I found in a Commodore 64 manual. Googling says it's the Gregory-Leibniz series.

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robbyg

remix of d/13250 by u/robbyg

function u(t) {

for(c.width|=y=27;x.fillStyle=['#47a','#ec2','#d66'][--y%3];)for(i=450;i--;)x.fillRect(z=680+i+y+C(y/4-4*t)*200,100+y*33+S(z/12-6*t)*18,6,7)

Apr 16 2019 9:03 PM UTC

}// 140/140

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Publishing the version with help from u/pavel and u/joeytwiddle because it's pretty great.

u/robbyg

#beesandbombs

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robbyg

function u(t) {

for(j=20,h=96;h--;)for(v=54;v--;)x.fillStyle=R(z=(T(t-h*v)+1)*j,z/2,z*4),x.fillRect(h*j,v*j,j,j)

Jul 16 2018 6:34 PM UTC

}// 96/140

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u/DataMeta

I love it!
u/aleamb

awesome!

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robbyg

function u(t) {

for(s=24,H=80;H--;)for(V=45;V--;x.fillRect(H*s,V*s,s,s))x.fillStyle=C(V-t*9)>C(V*H)?'#7be':'#36c'

Jun 24 2020 6:33 PM UTC

}// 97/140

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Reminds me of an 8-bit waterfall.

u/Xen

love it!
u/aleamb

#waterfall

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robbyg

function u(t) {

c.width=192
x.arc(76,28,3,0,7)
x.arc(116,28,3,0,7)
x.fill()
x.fill(new Path2D(`M86 44 Q96 ${34-C(t)*10},106 44T106 64T86 64T86 44`))

Jun 27 2019 6:41 PM UTC

}// 133/140

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Comedy/Tragedy

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robbyg

remix of d/12870 by u/vinca

function u(t) {

c.width|=0,Z=16
for(Y=V=34,A=.2;V>-Y;V--)for(H=X=60;H>-X;H--)T(A*H)*T(A*V)>S(A*H*A*V*S(t))&&x.fillRect(H*Z+X*Z,V*Z+Y*Z,Z,Z)

Mar 28 2019 3:00 AM UTC

}// 123/140

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u/katkip

Wow

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robbyg

remix of d/16500 by u/DataMeta

function u(t) {

r=Math.random
for(j=576;j--;x.fillStyle=R(a=r()*255,a,a,.5))d=54*r(),z=30-d/2,x.fillRect(j%32*60+z,(j/32|0)*60+z,d,d)

Nov 6 2019 10:33 PM UTC

}// 117/140

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u/DataMeta

Nice one. To take it full circle (or square) to d/15628: r=Math.random,a=r(b=r(c=r(l=255))) for(j=576;j--;x.fillStyle=R(a*l,b*l,c*l,r()/5))d=64*r(),z=30-d/2,x.fillRect(j%32*60+z,(j/32|0)*60+z,d,d)
u/joeytwiddle

Mellow: r=()=>(1+S(j**5-t++*3))/2 Darker: r=()=>S(j*j-t++*3)%1

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robbyg

remix of d/8556 by u/Xen

function u(t) {

t&&x.drawImage(c,0,3)
for(Z=i=360;i--;x.fillRect(i*9-C(t+t-S(i/19))*Z-Z,0,Z,3))x.fillStyle=`hsl(${S(i)*Z},${z=25+i%55}%,${z*.8}%)`

Jun 12 2018 9:12 PM UTC

}// 130/140

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u/Xen

looks tasty, makes me hungry!
u/joeytwiddle

Yes, yummy. #rainbow

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