Dweets awesomed by u/tomxor

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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asteriskman

function u(t) {

c.width|=0
x.font='8em"'
i=t%6
u.t=i>u.t?6*S(t):u.t||0
a=450
x[f='fillText']('🐺',S(i)*a+a,C(i)*a+550)
x[f]('🦴',S(u.t)*a+a,C(u.t)*a+550)

Oct 6 2019 1:44 PM UTC

}// 135/140

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Inktober Day 6 - Husky

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tomxor

function u(t) {

for(c.width=63,i=3e3;i--;x.fillRect(R=i&63,T=i>>6,1,.5-Z/24))for(j=5,Z=12;j--;)Z-=((R-32)**2+(T-18)**2+Z*Z)**.5-8+S(R/2+t*4)*S(T/2)*S(Z/2)*3

Oct 6 2019 12:27 PM UTC

}// 140/140

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Ray Marching SDF Sphere+Bumps

u/tomxor

Specifically, sphere tracing, with axis aligned field, i.e no perspective, marching along Z only. The sphere is not rotating, the simple displacement map is just being pushed through it's x.
u/yonatan

orthogonal raymarching... nice idea
u/tomxor

You said it more succinctly :)
u/tomxor

#raymarching

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kooga

function u(t) {

a=5;b=1+parseInt(t*2,10);d=100;
c.width=a*d;
for(i=0;i<120;i+=1){
for(j=0;j<120;j+=1){
if(i*j%b)x.fillRect(i*a,j*a,a,a)
}
}

Oct 6 2019 3:19 AM UTC

}// 123/140

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divibility!

u/metamero

incidental #opticalillusion #ScintillatingGridIllusion

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yonatan

function u(t) {

with(x)if(!t){c.width=innerWidth
onmouseup=e=>fillStyle='#'+(q*1e6|0)
onmousemove=e=>fill(arc(e.x,e.y,1+q**44*99,0,7,beginPath()))}
q=t*t%1

Oct 5 2019 11:35 PM UTC

}// 139/140

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Paint (like Jackson Pollock). Click to change color.

u/yonatan

based on k3lab's OilPainting - http://wa.zozuar.org/code.php?c=92Ul
u/taupelink

excellent

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taupelink

remix of d/15661 by u/taupelink

function u(t) {

for(f=.5,i=d=e=1e3;i--;x.fillRect(960+d*z*C(e),540+d*z*S(e),f,f))r=20+Math.random(z=60)*z|0,[d,e,f]=[r/5+f*C(d),r+f*S(d)/r**.5,r%2+.5/f**.5]

Sep 29 2019 9:00 PM UTC

}// 140/140

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d/15854

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KilledByAPixel

remix of d/15724 by u/KilledByAPixel

function u(t) {

$="𖥀𒩨򐢚򸀦򪪁񺚔򚮦򻿽􊪀𓳼󐀃"
eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪀽𪐽𜠲𝀻𪐭𛐻𭠿𮀮𩡩𫁬𤡥𨱴𚀱𜰫𚀨𫐽𚀱𞐹𚡴𙑔𚐥𥁼𜀩🠱𞐷🱔𛑭𞡭𚐭𪐥𞀪𚁩🠱𜐲🰭𜠺𜠩𛀹𞀫𢐯𝁼𜀬𜠬𜠩𞡔🐳𞐴𚑉👩𙐱𜐲𛁸𛡦𪑬𫁓𭁹𫁥👒𚁶🐤𛡣𪁡𬡃𫱤𩑁𭀨𢐯𝐩🠾𢐥𝐪𜠦𜰬𭠪𞀵𚐻`.replace(/u../g,'')))

Sep 29 2019 5:03 PM UTC

}// 140/140

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Koopa Shell Bounce

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tomxor

remix of d/15822 by u/joe.m

function u(t) {

for(c.width=w=X=1920;X--;x.fillRect(X,w*Y/18,9,9))
for(Y=n=5;n--;k=n*2+1,Y+=S(38*X/w*k)/k**(2-S(5*X/w-3*t)))1

Sep 27 2019 8:03 PM UTC

}// 109/140

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Squine Wave

Show more comments…
u/Xen

i wanna hear it!
u/tomxor

Oh no the challenge has been set! i'd imagine it sounds a bit like wavetable synthesis, even though it's not.
u/KilledByAPixel

it sounds like tone morphing between a sine and square wave.
u/katkip

interesing
u/katkip

^ with t
u/iverjo

#waveform

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joe.m

function u(t) {

w=1920
f=12.57/w
t?0:y=[]
j=t*120+1
for(i=0;i<w;i++)
{
if(!t)y[i]=0
y[i]+=S(i*f*j)/j
x.fillRect(i, 520+400*y[i], 1, 1);
}

Sep 27 2019 2:59 PM UTC

}// 121/140

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ooh, you can keep state!

u/tomxor

#fourier
u/tomxor

Welcome to Dwitter! you can also use u instead of y to save the initialisation space, as you can use functions for their object properties.

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joe.m

function u(t) {

w=1920
c.width=w
f=6.28/w
for(i=0;i<w;i++)
{y=0
for(j=1;j<=Math.abs(((20*t)%40)-20);j+=2) y+=S(i*f*j)/j
x.fillRect(i, 520+520*y, 10, 10);}

Sep 27 2019 1:09 PM UTC

}// 138/140

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sum of even harmonics

u/tomxor

#fourier

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katkip

remix of d/15811 by u/Xen

function u(t) {

with(x)for(i=8;i--;fillStyle=`hsl(${a*57.3+t*t} 70%${50+t*4}%`)beginPath(fill(lineTo(960,540))),arc(960,540,2e3,a=i*.8-t*t,a+.8)

Sep 26 2019 5:39 PM UTC

}// 128/140

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This is how it would behave in real life

u/Xen

Thats how i behave in real life
u/tomxor

Woah, transcended 60FPS :P

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