Dweets awesomed by u/lionleaf

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: #Food

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lionleaf

remix of d/587 by u/BriSeven

function u(t) {

N=80;c.width=2e3;for(j=N;j;j--)for(i=N;i;)x.fillRect(980+S(j/N*8)*150+T(i/N*4)*99,
540+C(j/N*8)*150+C(t+i--/N*4)*300,5,5)

Jan 12 2017 9:07 PM UTC

}// 121/140

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A golfed remix which should leave some more room to play around with :)

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BriSeven

function u(t) {

N=50;P=44/7;c.width=1920;for(j=0;j<N;j++)for(i=0;i<N;i++)
x.fillRect(980+S(j/N*P*2)*150+S(i/N*P)*300,
540+C(j/N*P*2)*150+C(t+i/N*P)*300,5,5)

Jan 6 2017 7:37 AM UTC

}// 140/140

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u/iverjo

Cool, a torus!
u/donbright

NICE
u/Purpzie

Shortened by 5 characters: for(c.width|=a=0,N=50,P=44/7;a<N*N;)x.fillRect(980+S((j=0|a++/50)/N*P*2)*150+S((i=a%50)/N*P)*300,540+C(j/N*P*2)*150+C(t+i/N*P)*300,5,5)
u/Cloud

#tor

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BriSeven

remix of d/579 by u/BriSeven

function u(t) {

m=160;x.fillStyle=R(C(h=t/2)*m+m,S(h-.5)*m+m,S(-h-.5)*m+m,.01);x.fillRect(t%13*m,0,4,2e3);x.drawImage(c,5*C(t),0,1920,1060)

Jan 5 2017 1:09 AM UTC

}// 123/140

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taste the rainbow maximum amperage edition

u/iverjo

Ooh, the red/orange/yellow thing top left almost looks like a flame. A flame variant with only flame colors would be nice, I think
u/donbright

wild

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iverjo

remix of d/257 by u/iverjo

function u(t) {

x.fillStyle=R(249,183,227,.01);X=S(t);x.lineTo(960+512*X*X*X,480-32*(13*C(t)-5*C(2*t)-2*C(3*t)-C(4*t)));x.fill()

Dec 31 2016 3:17 PM UTC

}// 112/140

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u/BriSeven

nice maths
u/iverjo

Found the mathematic formula online somewhere ^^
u/joeytwiddle

Wait, there's a mathematical formula for love? :-O
u/iverjo

#heart
u/katkip

<3 #math

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New_Core

function u(t) {

b=a=c.width=500;for(i=a*5;i--;)g=i%(h=b+9*S(t))>h/2?0:b,x.fillRect(g+i%13*b*2-1*i*.6+(b*8*S(t*.5))%b*2,150+i*.05,b=20+i*.05,1)

Dec 31 2016 12:13 PM UTC

}// 126/140

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u/iverjo

Awesome :D
u/iverjo

This dweet reminds me of the Windows 3.1 chess background image: http://i.imgur.com/Zv5eBRk.png
u/New_Core

#checkerboard

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BriSeven

remix of d/562 by u/BriSeven

function u(t) {

if(!t)a=1;for(i=0;i<1920;i+=1){x.fillStyle=(t|0)%2?"#FFF":"#000",x.fillRect(i*4,C(a)*t*100&1023,8,8),a+=C(t*i*a)}

Dec 30 2016 10:01 PM UTC

}// 113/140

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u/iverjo

Smooth

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BriSeven

remix of d/564 by u/BriSeven

function u(t) {

if(!t)d=X=Y=a=255.88;for(i=d|0;--i;)x.fillStyle=R(S(a)*d,C(a+t)*d,S(-a)*d,.1),x.fillRect(X=9*S(a)+X&(d*8),Y=9*C(a)+Y&(d*4),8,8),a+=C(t*i*a)

Dec 30 2016 9:51 PM UTC

}// 139/140

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it looks like if you keep an accumulator variable in a feedback loop, you can get C to produce more random looking results. (except for at the very start.)

u/BriSeven

a+=C(t*i*a)
u/iverjo

Nice. Related dweet: https://www.dwitter.net/d/291

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BriSeven

remix of d/559 by u/BriSeven

function u(t) {

for(i=0;i<1920;i+=1){x.fillStyle=(t|0)%2?"#FFF":"#000",x.fillRect(i*4,S(i*t*7919)*1080,8,8)}

Dec 26 2016 9:46 AM UTC

}// 92/140

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spot the pattern

u/iverjo

S(i*t*2246795327919) is kinda nice and smooth, with less patterns
u/iverjo

S(i*(t+9)*2246795327919) is even smoother (in the beginning)
u/donbright

these ones where you erase and re-draw are really interesting.

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New_Core

function u(t) {

if(!t)I=new Image(),I.src="http://is.gd/kjG7hF";c.width=1e3;x.drawImage(I,Math.floor(5*t%8)*184,0,184,325,-300+80*t%2e3,99,256,325)

Dec 25 2016 7:25 PM UTC

}// 131/140

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I was first thinking of doing alot of 3d rotating boxes but didnt find any good,,, ;) then I thought of reading pixels as letters and do all code I need on the picture but code got to long,, so a simple animation will do.

u/13thptr

#external
u/13thptr

#broken

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BriSeven

function u(t) {

for(i=0;i<1920;i+=1){x.fillStyle=i%2?"#FFF":"#000",x.fillRect(i*4+S(t)*20,(t*t*t%(i*i))%997.997,8,8)}

Dec 25 2016 2:10 AM UTC

}// 102/140

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u/iverjo

Moiré
u/BriSeven

i actually posted this on accident looking for a cheaper way to get randomish looking numberss than Math.random()
u/iverjo

Good quest
u/iverjo

In some cases T(veryLargeConstant*x) or S(veryLargeConstant*x) can look random enough

dwitter.net | lionleaf (43039)