Top dweets by u/anthonylewis

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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anthonylewis

function u(t) {

c.width=1920;x.fillStyle=R(0,0,0,0.3)
for(i=64;i--;)x.beginPath(x.fill()),
x.arc(S(t+i/5)*400+960,C(t+i/50)*400+540,64,0,6.28)

Apr 19 2018 2:09 AM UTC

}// 126/140

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u/BalintCsala

c.width|=0, x.globalAlpha=.3

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anthonylewis

function u(t) {

Z=Math.random;rg=Z()*127+128;x.fillStyle=R(rg,rg,255);
x.beginPath();x.arc(Z()*1920,Z()*1080,Z()*128,0,2*Math.PI);x.fill();

Apr 5 2018 4:15 AM UTC

}// 123/140

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anthonylewis

function u(t) {

r=t**2;x.beginPath();x.arc(960+C(t)*r,540+S(t)*r,r,0,2*Math.PI);x.stroke();

Apr 3 2018 3:11 PM UTC

}// 76/140

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My first post, just a silly spiral

u/BuRRak

Cool
u/zanella

Nothing silly about it. :) And welcome! Have fun!!

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anthonylewis

remix of d/7608 by u/anthonylewis

function u(t) {

for(c.width|=i=19;i--;)for(j=10;j--;)
Math.random()>.99?
x.fillRect(i*100,j*100,75,75):
x.strokeRect(i*100,j*100,75,75)

May 4 2018 4:54 AM UTC

}// 119/140

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Blinking Lights

u/iverjo

Look in full screen, and you might start seeing circles near the square corners! #opticalillusion

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anthonylewis

function u(t) {

c.width^=0;x.translate(960,540)
x.fillStyle=R(0,0,0,.1);for(i=20;i--;)
x.beginPath(),x.arc(0,0,i*50*(S(t)+1),0,7),x.fill()

Apr 16 2018 12:38 AM UTC

}// 123/140

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u/joeytwiddle

Now I have the Looney Tunes music in my head!

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anthonylewis

remix of d/7634 by u/anthonylewis

function u(t) {

r=Math.random;c.width=500;s=.3
for(i=64;i--;)
x.fillStyle=R(r()*255,r()*255,r()*255),
a=r()*-270,b=r()*a*(s*=-1),x.fillRect(b+250,a+270,9,9)

Apr 12 2018 12:40 AM UTC

}// 140/140

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anthonylewis

function u(t) {

for(i=37;I=i*50,i--;)for(j=20;J=j*50,j--;){Z=(C(i+j+t)+1)*128
x.fillStyle=R(Z,Z,Z);x.fillRect(I,J,48,48)}

Apr 8 2018 12:04 AM UTC

}// 105/140

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anthonylewis

function u(t) {

t?0:a=[];c.width^=0;a.unshift(Math.random()*1080)
a.forEach((e,i)=>{for(j=i;j--;)x.fillRect(j*18,e,18,9)})
if(a.length>110)a.pop()

May 10 2018 9:38 PM UTC

}// 130/140

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Streaks

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anthonylewis

remix of d/7659 by u/New_Core

function u(t) {

w=c.width^=0
for(i=30;i--;)
Z=w/(i-t%2+1),x.rect(-Z/2+960,-Z/2+540,Z,Z),x.stroke()

Apr 20 2018 12:16 AM UTC

}// 82/140

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A simple tunnel to use a base for future effects (hopefully)

u/jylikangas

You can use strokeRect here. Golfed to 71b... for(w=c.width|=i=30;i--;x.strokeRect(960-Z/2,540-Z/2,Z,Z))Z=w/(i-t%2+1)
u/magna

#tunnel

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anthonylewis

function u(t) {

c.width=1920;with(x){translate(960,540);rotate(t)
beginPath();fill(arc(0,0,200,3.1,6.3))
fillRect(-150,90,90,90);fillRect(60,90,90,90)}

Apr 6 2018 3:50 AM UTC

}// 135/140

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Happy Spinning

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