Dwitter - javascript demos in 140 characters

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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GeorgesAbitbol

function u(t) {

for(j=0;j<5;j++)
for(i=0;i<9;i++)x.fillRect(958+80*S((j+i)*t)+170*(4-i),170*(2-j)+538+80*S((i+1)*t+1),4,4)

May 16 2018 6:11 PM UTC

}// 106/140

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u/magna

Nice! Similar work: d/6494
u/GeorgesAbitbol

indeed ! I'll check your work !

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robbyg

remix of d/8103 by u/robbyg

function u(t) {

x.font='2em arial';for(i=63;i--;)x.fillText('◢◣◤◥'[~~(Math.random()*4)],i*32,t*1920)

May 17 2018 9:08 PM UTC

}// 84/140

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#truchet tiles

u/firegodjr

#charmatrix

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loernz

remix of d/8094 by u/yonatan

function u(t) {

c.width|=0
for(i=6e3;i--;x.fillRect(960+(h=S(i/10-t)*i/4),1200-i/2-C(t+i/1023+h*h/1e8)*h*i/5e3,s=99/i**.1,s))x.globalAlpha=.07

May 16 2018 10:27 AM UTC

}// 126/140

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prplz

remix of d/8125 by u/prplz

function u(t) {

z=Math.random;x.font='7em x';for(i=22;i--;x.fillText('◢◣◤◥'[z()*4|0],z()*2e3,z()*1e3))x.fillStyle=R(S(t/2)*55+133,0,199)

May 18 2018 8:36 AM UTC

}// 120/140

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#purple

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GeorgesAbitbol

function u(t) {

for(i=1;i<10;i++)x.fillRect(958+80*S(i*t)+170*(i-5),+538+80*S((i+1)*t),4,4)

May 16 2018 6:22 PM UTC

}// 75/140

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nishmatt

function u(t) {

c.width|=0;v=S(t)*S(t);x.translate(800*v,99);n=370;x.arc(n,n,130,v,v*C(t));x.lineTo(n,n);x.fill();x.fillStyle="red";x.fillRect(410,300,9,9);

May 15 2018 2:37 PM UTC

}// 140/140

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#piemonster

u/iverjo

#pacman

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ToxicCaves64

function u(t) {

t?0:(g=m=s=r=0,a=[]);c.width=400;x.fillText(m,2,8);c.onclick=()=>(a.push(m-r),r=m);a.map((i,j)=>x.fillText(i,2,20+8*j));g+=1;g%60==0?m=s++:0

May 17 2018 4:38 AM UTC

}// 140/140

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A Stopwatch In 140

u/ToxicCaves64

Click to make a lap
u/Friend

Pushed it to 135 - c.width=400;x.fillText(m,2,8);c.onclick=()=>(a.push(m-r),r=m);a.map((i,j)=>x.fillText(i,2,20+8*j));g+=1;g%60==0?m=s++:0}{g=m=s=r=0;a=[]
u/Friend

#interactive
u/BuRRak

Down to 64 without line breaks: c.width=400 onclick=Q=>V+=" "+~~t x.fillText(~~t+V,0,9); }{V=""
u/BuRRak

Sorry, 62 if you remove the semicolon & space/newline after it

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robbyg

remix of d/6369 by u/tmcw

function u(t) {

for(i=200;i--;)x.fillText('╲╱'[~~(Math.random()*2)],i*10,t*600)

May 15 2018 2:00 PM UTC

}// 63/140

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Micro #maze

u/magna

57: for(r=i=200;i--;r+=r*t|4)x.fillText('╲╱'[r&1],i*10,t*600)
u/magna

56: for(r=i=2e3;i-=10;r+=r*t|4)x.fillText('╲╱'[r&1],i,t*600)

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GeorgesAbitbol

function u(t) {

x.fillRect(958+S(3*t)*300,590+S(3.14159*t)*300,4,4)

May 16 2018 6:16 PM UTC

}// 51/140

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magna

remix of d/8103 by u/robbyg

function u(t) {

for(r=i=2e3;i-=10;r+=r*t|4)x.fillText('╲╱'[r&1],i,t*600)

May 15 2018 4:53 PM UTC

}// 56/140

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Shaved a few characters #maze

u/magna

Also see: http://www.p01.org/64b_thread_js/