Dweets awesomed by u/Purplesock21

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: #Opposites

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Purplesock21

remix of d/20086 by u/anotherkitten

function u(t) {

for(i=40;--i;x.fill(p=new Path2D(),p.arc(960,540,V*30,0,7)))x.fillStyle=`hsla(3,100%,${200*S((V=i-t%1)-t)+100}%`

Sep 29 2020 2:52 AM UTC

}// 112/140

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Hypno Ring

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Purplesock21

function u(t) {

for(c.width|=i=0;i<66;)x.fillRect(960+S(t+(i*2))*100,i++*17,10,10)

Sep 29 2020 2:35 AM UTC

}// 66/140

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Purplesock21

remix of d/19816 by u/danny@hille.dk

function u(t) {

for(c.width|=i=0;i<6;i+=.01)x.lineWidth=1,r=(.2*S(t+C(t-i)))*(C(S(i*3)*C(t+S(i))))*1e3,a=i+S(r/88),x.lineTo(970+r*C(a),540+r*S(a))
x.fill()

Sep 29 2020 2:25 AM UTC

}// 139/140

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Purplesock21

function u(t) {

f=(X,Y,n=7)=>Y*Y>n?n:f(3*X*Y-.8,Y*Y-X*X,n+2);for(i=3e3;i--;x.fillRect(i,t*60,1,1))x.fillStyle=`hsl(${K=f(i/3e3,t/45)},99%,${S(K/9)*91}%)`

Sep 29 2020 2:16 AM UTC

}// 137/140

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pavel

remix of d/20106 by u/pavel

function u(t) {

with(x)for(c.width|=j=32,translate(960,r=540),a=t/=7;j--;scale(s=1/2**.5/S(t%1.571+.785),s))rect(-r,-r,2*r,2*r),rotate(a=-a);x.fill`evenodd`

Sep 26 2020 3:09 AM UTC

}// 140/140

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Squares all the way down #2

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anotherkitten

function u(t) {

for(i=15;--i;x.fill(p=new Path2D(),p.arc(960,540,V*100,0,8)))x.fillStyle=`hsla(270,40%,${25*S((V=i-t%1)-t)+50}%`

Sep 24 2020 3:15 PM UTC

}// 112/140

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if you stare at the center, the white rings move slowly; if you stare at the white rings, they move quickly #illusion

u/MAxSaL

I found it to be the opposite?
u/anotherkitten

huh, interesting

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nender

function u(t) {

c.width=2e3;x.lineWidth=6;v=1e3;b=187;n=864;for(i=0;i<9;i++){r=n-(n/=1.7);v+=S(i*t)*r;b+=C(i*t)*r;x.beginPath();x.arc(v,b,n,0,8);x.stroke()}

Mar 5 2019 3:48 PM UTC

}// 140/140

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saved a few more chars and upped the line width

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