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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bsodtime100

function u(t) {

x.fillRect((t*500)%1000,t*100,10,10);x.fillRect((t*500)%1000,-t*100+1000,10,10)

Sep 28 2019 12:02 AM UTC

}// 79/140

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corruptio

remix of d/15807 by u/corruptio

function u(t) {

t?eval(O+=(`;()*+,-=RSdehlrwx|`+7/32+R)["􎐮򯏏󺨬􁻇􀃆𠉰􆖭񪎼󐙒􁋃𵠩𧚃󅬅򤬅𼩔𤠀".charCodeAt(I/2)>>I++%2*5&31]):I=O=""

Sep 26 2019 8:18 AM UTC

}// 95/140

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saving more space if you only use the numbers: ".012578"

u/corruptio

instead of 7/32, 7
u/corruptio

/6.4 and 9/6.4 give interesting digits too
u/KilledByAPixel

awesome ideas!

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robbyg

remix of d/15800 by u/zooi

function u(t) {

for(i=3e3,c.width|=Z=30;i--;S(8*t+8*A)>0&&x.fillRect(H*Z,V*Z,Z,Z))H=i%65,V=i/65|0,A=Math.atan2(V-18,H-32),x.fillStyle=`hsl(${A*57},70%,60%)`

Sep 25 2019 9:48 PM UTC

}// 140/140

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Remixed for fullscreen goodness and color. 🌈⭐

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katkip

remix of d/2224 by u/rpearl

function u(t) {

for(r=1.17,c.width|=s=0,x.lineWidth=9;s<29;st=s*r/3,ds=S(t*2+r*s*127)*500,x.arc(960+S(st)*ds,540+C(st)*ds,0,0,6),x.stroke(),s++);

Sep 26 2019 5:24 PM UTC

}// 129/140

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nikoloffgeorgi

remix of d/15829 by u/nikoloffgeorgi

function u(t) {

c.width|=a=20
o=200+S(t*2)*90
while(a--){
w=540+S(a+t*5)*o
e=(a-1)*o
x.quadraticCurveTo(a*o,w,(a*o+e)/2,(w+540+S(a-1+t*5)*o)/2)
}
x.stroke()

Sep 27 2019 3:43 PM UTC

}// 140/140

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Blacklink

function u(t) {

c.width|=0
s=.00045*C(t)+.00055
a=-29.5*C(t)+30.5
for(var r=-3.14;r<3.14;r+=s){x.fillRect(500*S(r+C(a*r))+980,500*C(r+S(a*r))+540,9,9)}

Sep 24 2019 7:43 AM UTC

}// 135/140

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Pretty cool parametric equation

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smtsjhr

function u(t) {

c.width=1920
for(i=0;i<2000;i+=20){for(j=0;j<1200; j+=20){x.fillStyle=R(0,0,0,.5+.5*S(.0002*t*(i-960)*(j-540)))
x.fillRect(i,j,20,20)}}

Sep 25 2019 4:01 AM UTC

}// 135/140

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KilledByAPixel

remix of d/15786 by u/KilledByAPixel

function u(t) {

t?O+=" thisrngwoudeafyc!mpbl.qk"["𠒃𰂡񀰇𰰠񚁀񂢫񫆠񩧀𺗡򐆢񹐰𻈤𘁢𑂃򠅭𓄳𱊃񵔀𘰂𓖆𒄮𺠠𒓉𓄰򬦅𱂩𕡁𻀌𻐌񙆒򸉃𘰭񘲆𕣉򍐠𨠥𓴁𒓊󈶊򐆢񹐰𻀄񼀆񵅀񱀋򻔤񀀉񚺊񵛠񚦁󁁠𐖡񶀄𓖎𒆄񜅦𑄡񠈆򢒳𳈤".charCodeAt(I/2)>>I++%2*5&31]:I=O="";throw O

Sep 23 2019 9:05 PM UTC

}// 139/140

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240 character message and uncompressor!

u/katkip

wow nice

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corruptio

remix of d/15786 by u/KilledByAPixel

function u(t) {

t?eval(O+=`;r(.wdh|=9-)xlRe40+*S3,52${R}`["􎑁𯏄󹓦􂄨􀅊񨁬􆖭򋮼򐨱􄤳򢑔񯚳򜘖򜛶󄘸񬐀".charCodeAt(I/2)>>I++%2*5&31]):I=O=""

Sep 26 2019 7:24 AM UTC

}// 97/140

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save some space if your dictionary happens to contains "functio"

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taupelink

remix of d/15772 by u/taupelink

function u(t) {

for(i=d=e=f=1e3;i--;x.fillRect(d*z,e*z,h=f/(1+f),h))[d,e,f]=[(r=1+Math.random(z=92)*z|0)/4+(r%9/8+f)*C(q=d^f),r%11+(f+4/r)*S(q+r),r%.7+.2/f]

Sep 27 2019 3:22 AM UTC

}// 140/140

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d/15820