Dweets awesomed by u/smtsjhr

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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Qwitter

function u(t) {

x.fillStyle="#9351";x.fillRect(0,0,m=2e3,m);T=5.495;f=1+(t%(2*T)>T)^0;D=640;A=D/(1+(t%T)**3);x.clearRect(f*D+A*C(4*t),540+A*S(4*t),25,25);

Jan 26 2021 3:06 PM UTC

}// 138/140

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Exchanging Centers

u/smtsjhr

FILL then CLEAR instead of CLEAR then FILL! thats so neat! i never thought that and find it kinda *ZEN* in philosophy idk
u/Qwitter

Agreed @smtsjhr, I picked this technique up from post d/6548 by u/41407 and employ it frequently.

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Qwitter

function u(t) {

x.globalCompositeOperation="xor";f=x=>Math.random()*1520;d=400;x.fillRect(f(),f(),d,d);for(i=9;i--;)x.clearRect(d+i*100+S(t/5)*300,d,50,200)

Jan 26 2021 2:08 PM UTC

}// 140/140

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KilledByAPixel

remix of d/14752 by u/KilledByAPixel

function u(t) {

t%=1
c.width|=X=Y=Z=1
for(i=3e3;i--;x.fillRect(880+(a+t*X)*73,1200-(b+t*Z)*23,9,9))a=X-X*t,b=Z-Z*t,Z+=(X*Y-Z)/39,X+=(Y-X)/9,Y+=X*(27-Z)/90

Jan 25 2021 11:26 PM UTC

}// 138/140

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Animated #Lorenz Attractor Loop

u/KilledByAPixel

could be c.width|=t%=X=Y=Z=1

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Xen

remix of d/21448 by u/Xen

function u(t) {

onmousemove=e=>x.lineTo(e.x/.3,e.y/.3,x.stroke())

Jan 25 2021 7:10 PM UTC

}// 49/140

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49 another slight golf

u/Xen

*3 save 2 more bytes but not too exact sorry

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rodrigo.siqueira

remix of d/21434 by u/rodrigo.siqueira

function u(t) {

for(i=1080;i--;x.fillRect(a=t*120,i,2,.2-f(a/1000-1.3,i/990)))f=(X,Y,n=90)=>T(t*X)*S(Y)*2<2?f(X*X-Y*Y,2*X*Y+.7,n-=2):n/70

Jan 25 2021 2:54 PM UTC

}// 121/140

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Thorn forest #mandelbrot #fractal

u/Xen

Love it!
u/aaaaaz

#forest

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erin

remix of d/21439 by u/erin

function u(t) {

c.width=w=70;for(i=2800;i--;)x.fillRect(X=i%w,Y=i/w,X/15+1*C(Y/6.5)+C(X/7-5*t),1),x.fillStyle=`hsla(${U=i/9+S(t+i)*9},5%,50%,${C(U+i)+1})`

Jan 25 2021 2:15 AM UTC

}// 138/140

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Pulsar v2

u/andrea270872

very cool. It makes me thing of some retro tv intro, like from Dr Who! Great

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Qwitter

remix of d/21382 by u/Qwitter

function u(t) {

eval(unescape(escape`𭴽𨴮𭵩𩅴𪄽𝤴𞵣𛥳𭅹𫅥𛥦𪕬𭅥𬤽𘥣𫵮𭅲𨕳𭄨𞔹𚕩𫥶𩕲𭄨𘤻𮄮𩥩𫅬𤵴𮕬𩔽𘤣𝥢𝔢𞵦𫵲𚅩🔲𜴰𝄻𪔭𛔻𮄮𩥩𫅬𤥥𨵴𚅘🕩𙕷𛅙🕩𛵷𛄱𛄱𛤲𚥃𚄵𚥴𚴮𜔪𚅘𛔳𜤩𚤪𜤭𛤳𚤨𦔭𜔸𚔪𚤲𚔩𚔻`.replace(/u../g,'')))

Jan 25 2021 12:30 AM UTC

}// 118/140

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Ginger Bakers Dozen

u/Xen

nice

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Qwitter

remix of d/21395 by u/Qwitter

function u(t) {

w=c.width=64;for(i=2304;i--;x.fillRect(X=i%w,Y=i/w^0,1,.7*C((X**2+Y**2)**.5-15*t)+.7*C(((X-32+S(t)*32)**2+(Y-18+C(t)*9)**2)**.5-15*t)));

Jan 24 2021 11:06 PM UTC

}// 137/140

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Interference

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Qwitter

function u(t) {

w=c.width=32;P=t^0;x.fillRect(0,0,w,w);x.fillStyle="#2c5";for(k=w;k--;)(f=2**k,P&f&&x.fillRect(k,1,1,1),1e3*(t-P)&f&&x.fillRect(3*k,3,3,1))

Jan 24 2021 5:20 PM UTC

}// 139/140

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Binary Clock: good till t (sec) hits the 32nd bit. ms below

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Xaviaro

remix of d/21312 by u/Xaviaro

function u(t) {

x.globalCompositeOperation='xor'
a=1
b=frame*a
e=1536
x.fillRect(f=b%e,e-f-456,a,a)
for(i=0;i<2;i++){x.drawImage(c,a,0);x.drawImage(c,0,-a)}

Jan 24 2021 12:35 PM UTC

}// 140/140

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u/Xen

love it!

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