Dweets awesomed by u/aleamb

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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tomxor

function u(t) {

c.width=w=96
for(i=5e3;X=i%w,Y=i/w,i--;x.fillRect(X+2*Z,Y+4*Z,.6,1))Z=(.5+S(i/15+t*2)/2)*S(S(Y/8+t)+S(X/24+t)+t),Z=C(2*Z+S((X&Y)/(1+Z*Z))/8)

Mar 2 2019 7:46 PM UTC

}// 140/140

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Fractal Lake

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sdavey

function u(t) {

c.width=1920;x.font='200px x';
for(i=0;i<190;i++)
x.fillText(String.fromCharCode(129),i*Math.sqrt(i*t),S(t)*i+S(i*2+i)*200+500);

Mar 1 2019 10:52 PM UTC

}// 128/140

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pavel

function u(t) {

for(k=2e3;i=S(t+k),j=S(i*k--);f&&x.fillRect(960+540*i,540*++j,9,4))d=1-i*i-j*j,f=d**.5*2-i-j,x.fillStyle=R(g=8*f**3,g,g+28*f,1-.05/d)

Feb 28 2019 7:26 PM UTC

}// 133/140

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pavel

function u(t) {

for(c.width|=p=300;e=p--**.9%1;x.fillRect(960+r(0)/z,200+99/z,s=9*e/z,s))r=d=>p/(1+e*C(a=t/4+p))*C(a+p+d)+2*p/(1/e-e)*C(p+d),z=.5+r(1.6)/800

Feb 28 2019 6:54 AM UTC

}// 140/140

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Galaxy

u/pavel

300 bodies which individually only interact with an infinite mass at the center
u/pavel

Each body moves around an ellipse, the orbits are accurate. However, the movement speed is a very rough approximation.
u/pavel

Naively drawing an ellipse centers it around one of the focal points, however moving a body on this path slows the body down near this focal point and speeds it up near the other one.
u/pavel

The opposite effect is needed. So this code still moves a body around an ellipse but it re-centers the ellipse on the 'other' focal point.
u/pavel

In polar coordinates the difference between the x and y coordinates is a phase shift of pi/2 ~ 1.6

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Ath0r

function u(t) {

c.width=1920
p=[a=960,a/3]
w=i=>[a+300*C(z=t+2.09*i),800+100*S(z)]
f=i=>x.lineTo(...i)
for(i=6;i--;){b=f(w(i));f(p);f(w(i))}
x.stroke()

Feb 26 2019 9:07 PM UTC

}// 135/140

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My first dweet (simple pyramid)

Show more comments…
u/katkip

Nicee
u/Ath0r

Thanks! It's the first time I've tried, so probably I missed a lot of tricks to reduce characters... Any feedback or tips are welcome! :D
u/13thptr

b is unused so you can remove it :)
u/13thptr

nice dweet btw
u/13thptr

127:c.width=1920 w=i=>[960+300*C(z=t+2.09*i),800+100*S(z)] f=i=>x.lineTo(...i) for(i=6;i--;)f(w(i)),f([960,320]),f(w(i)) x.stroke()
u/13thptr

ugh sorry here it is with semicolons instead of newlines
u/13thptr

c.width=1920;w=i=>[960+300*C(z=t+2.09*i),800+100*S(z)];f=i=>x.lineTo(...i);for(i=6;i--;)f(w(i)),f([960,320]),f(w(i));x.stroke()
u/Ath0r

Thanks a lot for the suggestions, @13thptr! Indeed, I forgot to remove the unused b and the characters you remove by avoiding the definition of p is also very nice :)
u/tomxor

It's a spinning simplex!! :D great 1st dweet
u/Ath0r

Thanks @tomxor :D
u/f8f82804

#d3 #wireframe

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21medals

function u(t) {

for(c.width|=i=18,x.lineWidth=9;i--;)x.lineTo(960+S(q=t+(i+(i>8?-1:1)>>1)*1.57)*460*(d=1+C(q)/4),540+((i%4&2)-1)*(320+C(q)*99*d))
x.stroke()

Feb 24 2019 7:11 PM UTC

}// 140/140

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Just for practice

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katkip

remix of d/12510 by u/katkip

function u(t) {

c.width*=1;x.lineWidth=4;for(j=79;j--;)for(i=5;i--;)x.lineTo(960+C(i*1.57+j/(20+C(t+j/29)*5)+t)*200,900+S(i*1.57+j/99+t)*60-j*9);x.stroke();

Feb 24 2019 12:30 PM UTC

}// 140/140

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Twist

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magna

remix of d/12417 by u/DataMeta

function u(t) {

for(i=1e3;i--;)x.fillRect(i*2,t*99,r=t+S(i*333)*C(i*777)<8&&6*Math.random(),r)

Feb 20 2019 6:39 AM UTC

}// 78/140

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Starlit sky on alien planet

u/DataMeta

Ooh, nice
u/katkip

Haha, nice idea
u/rep_movsd

#underrated

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spaceman_blanc

remix of d/12383 by u/DataMeta

function u(t) {

c.style.background=R();for(i=325;i--;)x.fillStyle=`hsla(${i},99%,50%,.02)`,k=912*S(t/i),x.fillRect(960+k*1.8*T(i^t),524+k/C(i),i/9+9,i/9+9)

Feb 19 2019 8:49 AM UTC

}// 139/140

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2001

u/geb

#background
u/spaceman_blanc

To any remixers, you can drop the "c.style.background=R();" from the start and you will have 24 chars to play with.
u/katkip

Nice
u/katkip

Not really u/spaceman, on upload, the canvas will be reseted to white
u/spaceman_blanc

yeah youre right, didnt realise that. I mean you could still do something cool with 24 chars and white back ground i guess

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DataMeta

remix of d/12413 by u/Xen

function u(t) {

for(i=1e3;i--;)x.fillRect(i*2,t*99,r=6*Math.random(),r)

Feb 18 2019 6:24 PM UTC

}// 55/140

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Starlit sky

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