Top dweets by u/andrea270872

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: #Opposites

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andrea270872

remix of d/12771 by u/andrea270872

function u(t) {

c.width|=K=1e3
A=[(t*97%11-5)*K,(t*89%13-6)*K,0]
P=t?P.map(([i,j,z,v])=>[i,j,(z+1)%99,x.fillRect(K+i/z,500+j/z,z,z)]):[A]
P[K]||P.push(A)

Mar 15 2019 7:44 PM UTC

}// 137/140

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Build-up!

Show more comments…
u/Xen

love it
u/pavel

103 for(c.width|=K=k=1e3;k--;z>0&&x.fillRect(K+(k*97/60%11-5)*K/z,500+(k*89/60%13-6)*K/z,z,z))z=(60*t-k)%99
u/pavel

Looks like the code you started with used Math.random at each step which made the ultimate position of each square at time 't' impossible to determine directly. Switching to instead use any function of just t makes it quite simple so there is no need to initialize stuff at time 0 and keep it updated.
u/pavel

I learned that in d/11421 to save chars and make d/11424
u/andrea270872

great. thanks very much
u/andrea270872

In my head I was thinking also that t*97%11 is a pseudo-random generator...
u/katkip

Satisfying

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andrea270872

function u(t) {

c.width=1920
for(n=~~(t*39)%250;n--;)for(k=n+1;k--;~n&k?x.fillRect(n*7,k*7,7,7):0);

Jan 5 2023 11:23 AM UTC

}// 83/140

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pascal triangle mod 2 = sierpinski

u/andrea270872

according to Wolfram "The binomial coefficient (n over k) mod 2 can be computed using bitwise operations AND(NOT(n), k)"
u/andrea270872

https://mathworld.wolfram.com/SierpinskiSiev…
u/andrea270872

which is what I did here :)

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andrea270872

function u(t) {

c.width|=j=1
for(;j++<15;)for(i=19;i--;x.font=C(t)+6+"em'")x.fillText([...'🏡🌊🌳 '][~~((S((i-~(S(t)*6))*(j+~(C(t)*9))*97)+1)*2)],i*99,j*69)

Mar 20 2019 5:32 PM UTC

}// 137/140

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A map with panning and "zoom"

u/tomxor

oh wow neat! i keep missing these ones cos on chromium linux i get a bunch of tofu - FF is ok though.
u/joeytwiddle

I had a lot of tofu on Ubuntu but then I installed a new Manjaro ;-)
u/tomxor

I'm running minimal a debian, I think it's just missing font packages but can't be bothered to hunt for them. I will try Arch one day when I'm braver :P

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andrea270872

remix of d/24763 by u/KilledByAPixel

function u(t) {

t*=60
for(j=h=135;--j;)for(i=w=240;--i;)
x.fillRect(i+t%8*w,j+(t>>3)*h,1,S((99*i*j)/t%3))

Jan 14 2022 4:40 PM UTC

}// 89/140

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fiddling with the textures

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andrea270872

function u(t) {

r=_=>Math.random()
x.font=2+r()*3+"em'"
x.fillStyle='white'
for(i=7;i--;)x.fillText([...'🌱🌾🍁❄'][(t>>2)%4],r()*2e3,75+r()*1e3)

Mar 19 2019 4:57 PM UTC

}// 125/140

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Year

u/lionleaf

#seasons I'm enjoying this one!
u/DataMeta

Heh. Nice.

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andrea270872

function u(t) {

c.onclick=e=>{Y=K}
c.width|=K=1e3
Y=t?Y:0
x.fillRect(X=t*500%2e3,9,B=50+(10<Y&Y<99)*(950<X&X<K)*99,B)
x.fillRect(K,Y?Y-=20:K,9,50)

Mar 17 2019 2:46 PM UTC

}// 130/140

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William Tell (remake of my first game on C=64) - click to shoot the black "apple"

u/katkip

#game
u/katkip

#interactive

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andrea270872

remix of d/22757 by u/andrea270872

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪁼👁🐮𝀊𡠽𫠽🡮𙠦𮀮𭁲𨑮𬱦𫱲𫐨𠰨𠐩𚰮𜐬𤰨𠐩𛀭𤰨𠐩𛁃𚁁𚐬𜀬𜀩𯁸𛡦𪑬𫁒𩑣𭀨𭀥𞐬𝀬𞐬𞐩𯁆𚁮𛐱𚐊𩡯𬠨𪐽𜰷𞱩𛐭𞱸𛡳𩑴𥁲𨑮𬱦𫱲𫐨𝀬𜀬𜀬𝀬𜑥𜰫𠰨𭀯𞐫𪐪𠐩𚠹𜀰𛀶𜀰𚱓𚁴𛰹𛑩𚐪𝠰𜀩𚑸𛡦𪑬𫁓𭁹𫁥🐢𘱁𞑄𘠫𪐥𞐬𡠨𪐩`.replace(/u../g,'')))

May 12 2021 3:35 PM UTC

}// 139/140

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#seashell plankton... but a bit more prehistoric looking... (perhaps :D )

u/rodrigo.siqueira

Those are living ammonites. I have a fossil of it.

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andrea270872

function u(t) {

f=(X,Y,a)=>{for(i=1;i<10;i+=.2){K=5*(10-i);x.fillRect(X+(250-a.x)/i-K,Y+(180-a.y)/i-K,2*K,2*K)}}
onmousemove=e=>f(800,450,e,c.width|=0)

Jan 30 2021 6:46 PM UTC

}// 135/140

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mouse-controlled tower with parallax #interactive #parallax

u/katkip

nice
u/tomxor

nice
u/andrea270872

Thanks :) I wanted to have 2 towers but I ran out of characters :D
u/danny@hille.dk

cool

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andrea270872

function u(t) {

c.width|=0
x.fillStyle=`hsl(${S(t)*60%60},99%,50%,.7`
for(j=9;j--;)for(i=24;i-=2;)x.fillRect(99+(j*3+C((j+i+t)*9))*60,1e3-i*40,288-i*12,80)

Mar 29 2019 1:22 PM UTC

}// 139/140

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fire tentacles

u/joeytwiddle

#fire simple idea nice effect
u/rodrigo.siqueira

#tentacle

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andrea270872

remix of d/28200 by u/KilledByAPixel

function u(t) {

for(i=850;t<3&&i--;x.fillRect(960+r*S(a=(i%2-.5)*t-9.5),960-i-99*C(a),9,3))r=350+99*S(i/139),x.fillStyle=R(i,i%99,i)

Aug 4 2023 12:59 PM UTC

}// 116/140

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rotate and draw only the front...

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