Dweets by u/f8f82804

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: #Opposites

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f8f82804

remix of d/10304 by u/f8f82804

function u(t) {

c.width=480;with(x)for(translate(w=240,99),rotate(a=S(t)),i=17;i--||stroke();lineTo(w*S(p)/Z,.7*w/(i&4?-Z:Z)))Z=3+C(p=a*i/9+11*i-t+(i&~3)*2)

Oct 11 2018 4:20 PM UTC

}// 140/140

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small remix to fix variable-width lines due to multiple stroke() calls -- #glitch #cube #perspective #d3 #golf

u/f8f82804

#wireframe

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f8f82804

remix of d/9687 by u/f8f82804

function u(t) {

c.width=640;with(x)for(i=17;j=i^i-->>1;stroke())a=_=>j&_?-1:1,lineTo(320+320*S(b=t+Math.atan2(a(1),a(4)))/(Z=3+C(b)),180+224*a(2)/Z)

Oct 10 2018 9:58 PM UTC

}// 132/140

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using the double-arrow operator (-->>) to generate Gray code and visit vertices of a #cube in order -- #d3 #perspective

u/yonatan

you could use the straight-leg-kick operator (--/) and save a char
u/f8f82804

I figured that the community would appreciate seeing the counterpart of the more common single arrow -->
u/magna

When I'm not sure what I'm doing, I use the wiggly arrow operator <~~
u/f8f82804

#wireframe

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f8f82804

remix of d/9687 by u/f8f82804

function u(t) {

c.width=480;with(x)for(translate(w=240,99),rotate(a=S(t)),i=17;i--;stroke())lineTo(w*S(p=a*i/9+11*i-t+(i&~3)*2)/(Z=3+C(p)),w*(i&4?-.7:.7)/Z)

Oct 10 2018 7:16 PM UTC

}// 140/140

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#glitch #cube #perspective #d3

u/aleamb

great!
u/f8f82804

#wireframe

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f8f82804

remix of d/10293 by u/f8f82804

function u(t) {

with(x)for(i=c.width=320;i--;fillText('👹',155*(i?1+S(i^3*t):.4),90*(i?1+C(t-i):1.8)))i||(font='5cm a',globalCompositeOperation='xor')

Oct 10 2018 5:07 PM UTC

}// 133/140

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complex #emoji give interesting results with some #composite operations, at least in Firefox

u/f8f82804

It looks like each shape is drawn in a separate pass, which causes strange results! The only alternative would be to render the glyph to an off-screen canvas and then paint the image with appropriate compositing. This is hard to do in 140 chars!
u/f8f82804

update: on Firefox Android, the font rendering behavior is different

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f8f82804

remix of d/10293 by u/f8f82804

function u(t) {

for(i=768;i--;x.globalCompositeOperation=i?'source-over':'xor')x.fillRect(1920*Math.random(),1080*Math.random(),8,8);

Oct 10 2018 4:52 PM UTC

}// 117/140

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#twinkle #stars #waitforit

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f8f82804

function u(t) {

with(x)for(i=c.width=396;i--;fillText('👻',99*(i?2+S(i%47+t):1),72*(i?2+C(t-i):3)))i||(font='5cm a',globalCompositeOperation='source-atop')

Oct 9 2018 5:44 PM UTC

}// 138/140

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ᴇ ᴛ ʜ ᴇ ʀ ᴇ ᴀ ʟ

u/aleamb

cool!
u/joeytwiddle

What the? :-O #ghost #halloween
u/katkip

woow
u/f8f82804

#emoji #composite

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f8f82804

remix of d/10286 by u/f8f82804

function u(t) {

with(x)for(R=a=>Math.random()*a,X=R(1920),Y=R(1080),i=12;shadowBlur=i*i--;fillRect(X,Y,99,99))fillStyle=shadowColor=`hsl(${t}turn 85%45%`

Oct 9 2018 4:43 PM UTC

}// 137/140

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f8f82804

remix of d/10286 by u/f8f82804

function u(t) {

with(x)for(globalCompositeOperation='color',translate(C(t),S(t/5)),i=9;shadowBlur=i--;fillRect(912,i,96,96))shadowColor=`hsl(${t*48} 85%45%`

Oct 8 2018 10:43 PM UTC

}// 140/140

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more #composite #glow #color #fun

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f8f82804

function u(t) {

with(x)for(globalCompositeOperation='color',s=192,i=9;shadowBlur=i*i--;fillRect(864+s*S(t),444+s*C(t*3),s,s))shadowColor=`hsl(${t*s} 85%45%`

Oct 8 2018 7:54 PM UTC

}// 140/140

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#composite #glow #color

u/donbright

fascinating effect

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f8f82804

function u(t) {

if(t%.5<.01)c.width=480,x.font='96px a',s=[...'🦇🦉🕷🕸🎃🏚🌃🤡👹👺👻💀👽👾🧛🧞🧟🔮⚰☠'],x.fillText(s[Math.random()*(s.length)|0],196,180);

Sep 25 2018 6:48 PM UTC

}// 120/140

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just saving some #emoji for later

u/rep_movsd

#ScaryMovies ?

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