Top dweets of all time

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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cagr30

function u(t) {

tt=500*t;s=100;a=tt%1920;q=t;y=tt%1080;r=s*S(t);x.fillStyle=R(S(q*t)*255,S(2*q*t)*255,S(3*q*t)*255);x.fillRect(0+a,0+y,s-r,s-r)

May 8 2017 1:21 PM UTC

}// 127/140

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MrM@_S

remix of d/2573 by u/MrM@_S

function u(t) {

c.width=200;t||(z=X=2,s=-1);onkeyup=a=>z*=a.keyCode&15||1;x.fillText(X+"="+z+"? Score:"+s,2,9);z==X&&(X*=s++%4*~~t%4+1,z=1);z>X&&(frame=0)

May 5 2017 12:51 PM UTC

}// 138/140

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[The Math Game] Get the left side of the equation equal right side using the numbers 1-9. It is easier if you know how to multiply.

u/sigveseb

Cool game! Only problem is when the goal number's prime decomposition contains a prime number with more than one digit (e.g. 11 and up). Then it is impossible to enter the correct answer!
u/MrM@_S

"3+3+1=7" so X*=s++%4*~~t%4+1 would never have a prime composition of 11 etc. I am pretty sure that my algorithm prevents such causes.....
u/MrM@_S

wait it is "(0-3)*(0 to 3)+1"
u/MrM@_S

(0 to 3)
u/MrM@_S

that leaves a 1 through 10 possibility

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magna

remix of d/2622 by u/magna

function u(t) {

for(i=c.width=w=192;i--;)for(j=w;j--;b=i%8^(X+Y&1^f)*7,'ĒőäƈÓäŉĊ'.charCodeAt(j&7)-w&1<<b&&x.fillRect(i,j,1,1))X=i>>3,Y=j>>3,f=t*X/Y&1

Apr 28 2017 1:39 PM UTC

}// 133/140

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MrM@_S

function u(t) {

onkeyup=e=>frame=0
t||(c.width=600)
onmousemove=e=>{E=e.pageX,X=e.pageY}
onmousedown=e=>T=!T
T||x.lineTo(E,X)
x.drawImage(c,200,!x.stroke())

Apr 27 2017 5:21 PM UTC

}// 140/140

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[drawing tool] Click to turn off draw. Click again to draw a straight line to your mouse. Press any key to clear. It draws in 3 screens

u/iverjo

#interactive

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eruonna

function u(t) {

if(t%1<.01){c.width|=0;x.font="48px monospace"
for(i=127;--i;)for(j=33;--j;)x.fillText(Math.random()>.5?"\\":"/",i*15,j*35)}

Apr 26 2017 8:48 PM UTC

}// 124/140

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u/donbright

ingenious
u/sigveseb

classic old-school effect :)
u/rep_movsd

#10print
u/rep_movsd

#tenprint

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rileyjshaw

remix of d/2601 by u/rileyjshaw

function u(t) {

t*=s=60
x.beginPath()
for(x[g='globalAlpha']=1;t&&o<t;x.lineTo(m+q,S(o)*o+q))m=C(o+=.04)*o,q=S(2*m/s)*s
x.stroke();x[g]=.1;x.fill()
o=t

Apr 26 2017 6:10 PM UTC

}// 135/140

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u/magna

Neat!
u/donbright

fullscreen highly recommended, very cool texture

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hscells

remix of d/2557 by u/hscells

function u(t) {

w=c.width=1920
for(s=32,i=s;i<w-s;i+=s)for(j=s;j<w/2;j+=s)x.fillStyle=`hsla(${S(j/5)*s+196},90%,60%,1`,x.fillRect(i+s*C(j),j+s*C(j+i+t),s,s)

Apr 23 2017 3:44 AM UTC

}// 140/140

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u/joeytwiddle

#waves #water #sea #ocean

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Jenky

function u(t) {

t||(n=c.cloneNode(0),c.parentNode.replaceChild(n,c),g=n.getContext("webgl"))
g.clearColor(.7+.3*S(t*4),0,0,1)
g.clear(16384)

Apr 19 2017 9:49 AM UTC

}// 124/140

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WebGL, anyone? :D

u/Jenky

Kinda sucks it takes so many bytes to set up, anyone have ideas to shorten?
u/magna

Just keep drawing the new, off-screen canvas onto the existing 2D context seems to work (though, is probably inefficient): https://www.dwitter.net/d/2535

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Polyducks

function u(t) {

L=(X,Y,X1,X2)=>{x.beginPath();x.moveTo(X,Y);x.lineTo(X1,X2);x.stroke()}
if(t<16){L(S(t)*1000,S(t)*1000,T(t)*1000/S(t),t*100)}

Apr 18 2017 6:04 PM UTC

}// 125/140

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_A stone wall by the sea_

u/Polyducks

I'll work out how to do bold text soon, I swear...
u/tapgiles

The first comment is automatically made bold ;P
u/tapgiles

Looks cool. Wish the line wouldn't disappear for so long, though...

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eruonna

remix of d/2509 by u/eruonna

function u(t) {

a=[0,-9,0,9,0]
if(t){if(i>=0){d=(p[i--]+1)%4;p.push(d);j++;b+=a[d];c-=a[d+1];x.lineTo(b,c);x.stroke()}else i=j}else{p=[0];i=j=0;b=380;c=830}

Apr 17 2017 9:29 PM UTC

}// 140/140

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adjusted position to get more on the screen

u/donbright

:)