Dweets awesomed by u/tato

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.

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Current theme challenge: #ScaryMovies

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tato

remix of d/23865 by u/tato

function u(t) {

for(i=0;i<960*t;i++){Z=240
x.fillStyle=R(Z*S(t*7),Z*S(t*2),Z)
X=540*(1+C(t+i/Z*(1+C(t))))
W=32
x.fillRect(i,X,W,W)
x.fillRect(1920-i,X,W,W)}

Sep 16 2021 7:47 PM UTC

}// 140/140

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stripes 4

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tato

remix of d/22837 by u/tato

function u(t) {

for(i=0;i<960;i+=32){
x.fillStyle=R(255*S(S(t)*S(i/12)), 255*S(S(t)*S(i/6)),255*S(S(t)*S(i/3)))
x.fillRect(i*2,540+540*C(t+i/240), 64, 16)
}

Sep 16 2021 7:24 PM UTC

}// 140/140

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pavel

remix of d/23829 by u/pavel

function u(t) {

for(c.width=w=128,i=n=9088,t?a[n*t**3&127]=1:a=[],m=a.includes(0,-w);i--;a[i]=t?p&a[r=i+w]<1?a[r]++:r<n|m&&p:0)x.fillRect(i%w,i>>7,1,p=a[i])

Sep 16 2021 3:53 AM UTC

}// 140/140

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#tetris #snow

Show more comments…
u/KilledByAPixel

Genius.
u/Joachim

Wow. This is very clever
u/rodrigo.siqueira

Now I can't look at city buildings without thinking about this. See https://en.wikipedia.org/wiki/Tetris_effect The Tetris effect (also known as Tetris syndrome) occurs when people devote so much time and attention to an activity that it begins to pattern their thoughts, mental images, and dreams. E.g. People who have played Tetris for a prolonged amount of time can find themselves thinking about ways different shapes in the real world can fit together, such as buildings on a street.
u/Xen

love it!
u/magna

Fun to watch! :)
u/tomxor

@rodrigo I think I have The Dwitter Effect, or "Dwitter Syndrome" :D i'm not even joking
u/sigveseb

Nice idea! As an added bonus, if you leave it running for a while you get a graph of the prng bias for free :)

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pavel

remix of d/23719 by u/rep_movsd

function u(t) {

for(Y=t%4*50,r=Y<27?Y:27,i=99;a=i--/32;x.fillRect(X+2*r*C(a),5*Y+r*S(a),3,5))x.fillStyle=`hsl(${h=r<9|r-Y?X=t/4<<7:42},${h}%,${42+C(a)*20}%`

Sep 1 2021 9:24 PM UTC

}// 140/140

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16-Color Pencils

u/tomxor

haha, beat me to it, i had the same idea to golf using t but you made it even better with colour tips!!
u/Xen

nice!

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pavel

function u(t) {

with(x)for(i=w=t?0:2e3,h=540;y=h*S(i*i--);beginPath(fill(rect(690,491,h,98))))ellipse(i,h+y,2,20,Math.atan2(y-(i-720)*(i-1200)/y,2*i-w),0,7)

Aug 19 2021 6:31 PM UTC

}// 140/140

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#magnet

u/tomxor

Perfect
u/danny@hille.dk

very nice indeed
u/tomxor

And considerate t?0:2e3 :D

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smtsjhr

remix of d/20616 by u/smtsjhr

function u(t) {

t/=4;for(c.width|=n=2;n<8;n++)for(i=0|S(t*n)*30+30;k=(150+75*C(i/16)),i--;)x.lineTo(480*n-1200+k*S(j=i*6.28/n),540-k*C(j+t*n));;x.stroke()

May 21 2021 5:02 PM UTC

}// 138/140

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Webbed Polygons (**remixed for seamless loop)

u/rep_movsd

Looked familiar

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tato

remix of d/22836 by u/tato

function u(t) {

for(i=0;i<960;i++){
x.fillStyle=R(255*S(S(t)*S(i/12)), 255*S(S(t)*S(i/6)),255*S(S(t)*S(i/3)))
x.fillRect(i*2,540+540*C(t+i/240), 8, 16)
}

May 21 2021 4:19 PM UTC

}// 137/140

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stripes 2

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tato

function u(t) {

//c.width=1920
for(i=0;i<1920;i++){
x.fillStyle=R(255*S(t*i/960), 255*C(t*i/480),255*S(t*4))
x.fillRect(i,540+540*C(t+S(i*4)), 8, 8)
}

May 21 2021 3:46 PM UTC

}// 134/140

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stripes

u/Xen

nice!

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tato

function u(t) {

for(i=0;i<960;i++){
x.fillStyle=R(255*S(i+t), 255*C(t),255*S(t))
x.fillRect(2*i,540+540*S(S(t)+(t+i/2)/2), 8, 8)
}

May 21 2021 3:21 PM UTC

}// 114/140

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hidden images

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New_Core

function u(t) {

for(c.width|=i=a=540;i--;x.fillRect(960+a*S(v=i>>2)*Z,a+a*C(v)*Z,b=Z*50,b))Z=99/((i-t*99)%a+a),x.fillStyle=`hsl(${i},99%,${(a/Z/20)-i%4*9}%`

May 20 2021 6:26 PM UTC

}// 140/140

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u/miratcan

what is $ for?
u/magna

x.fillCube()
u/rep_movsd

${x} surrounded by backticks is ES6 javascript syntax - it puts the value of x in the string
u/Agnes

${} is usually more characters than string concatenation, but if you're doing mathematics in the expression (like "(a/Z/20)-i%4*9" here) you end up needing to surround it with so many parentheses if you're doing string concatenation that template strings are handier.
u/Agnes

${} is usually more characters than string concatenation, but if you're doing mathematics in the expression (like "(a/Z/20)-i%4*9" here) you end up needing to surround it with so many parentheses if you're doing string concatenation that template strings are handier.

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