Top dweets by u/robbyg

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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robbyg

function u(t) {

s="3E71EAA0325D3E7C"
s.match(/.{2}/g).map((h,v)=>{z=parseInt(h,16);for(i=128,h=0;i>=1;i/=2,h++)z&i&&x.fillRect(h*99,v*99,99,99)})

Jul 23 2019 7:18 PM UTC

}// 129/140

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Converting a hexadecimal string into a sprite. Change the value of s to play!

u/robbyg

121: "3E71EAA0325D3E7C".match(/.{2}/g).map((s,v)=>{for(i=128,h=0;i>=1;i/=2,h++)parseInt(s,16)&i&&x.fillRect(h*99,v*99,99,99)})
u/robbyg

119 (okay I should do something else now): "3E71EAA0325D3E7C".match(/../g).map((s,v)=>{for(i=128,h=0;i>=1;i/=2,h++)parseInt(s,16)&i&&x.fillRect(h*99,v*99,99,99)})
u/robbyg

#pixelart

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robbyg

remix of d/12143 by u/katkip

function u(t) {

c.width^=0;for(i=192;i--;)for(j=9;j--;x.fillStyle=`hsl(${h},50%,50%)`)x.fillRect(i*10,h=540-(S(t*2+i*3.12)*C(t+i+j/9)*j/4)*100,10,10)

Feb 4 2019 8:20 PM UTC

}// 133/140

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u/23_Skidoo

x.fillStyle="#fff3";x.fillRect(0,0,c.width,c.height);for(i=192;i--;)for(j=9;j--;x.fillStyle=hsl(${h},50%,50%))x.fillRect(i*10,h=540-(S(t*2+i*3.12)*C(t+i+j/9)*j/4)*100,10,10)
u/23_Skidoo

Or, replace c.width^=0 with x.fillStyle="#fff3";x.fillRect(0,0,c.width,c.height);

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robbyg

function u(t) {

t||(X=[...Array(50).keys()],Y=[...X]);for(i=50;i--;)h=X[i],x.fillRect(X[i]=950+(S(1*Y[i])-C(2*h))*440,Y[i]=550+(S(3*h)-C(4*Y[i]))*230,5,5)

Jun 8 2018 5:53 PM UTC

}// 138/140

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Peter de Jong attractor. Changing the 1, 2, 3, 4 multipliers in the sine/cosine functions changes the shape.

u/robbyg

#attractor
u/rodrigo.siqueira

Robbyg, here is a smaller version with higher resolution. Same equation, no need to create array: t||(h=X=Y=0);for(i=950;i--;) X=950+(S(1*Y)-C(2*h))*440, Y=550+(S(3*h)-C(4*Y))*230, h=X,x.fillRect(X,Y,1,1)

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robbyg

function u(t) {

for(w=c.width=2e3,a=c.d=c.d||[...Array(w)].map((x,i)=>Math.random()*w),i=0;i<w;i++)x.fillRect(a[i]+C(a[i]+t)*15,(i+t*60)%1080,5,5)

Jan 3 2018 7:12 PM UTC

}// 130/140

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robbyg

function u(t) {

eval(unescape(escape`睩瑨⡸⥦楬汓瑹汥㴢⍥敥∬汩湥坩摴栽ㄶⱳ瑲潫敓瑹汥㵒⡺㵓⡴⤪㤶⬱㈸ⱺⱺ⤬獴牯步剥捴⠰ⰰⰱ㤲〬㄰㠰⤬稾㈱㤦♦楬汒散琨㤱ㄬ〬㤸ⰸ⤬摲慷䥭慧攨挬㠬㔬ㄹ〴ⰱ〷〩`.replace(/u(..)/g,"$1%")))

Oct 21 2020 1:47 PM UTC

}// 123/140

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I'm not sure I want to know where this hallway leads...

u/robbyg

with(x)fillStyle="#eee",lineWidth=8,strokeStyle=R(z=S(t)*96+128,z,z),strokeRect(4,4,1916,1076),z>219&&fillRect(911,0,98,8),drawImage(c,8,5,1904,1070)
u/katkip

i love the method you used to make ceiling light effect thing

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robbyg

function u(t) {

for(i=9,c.width=32;i--;)x.fillRect(8+C(t)*4+i*2,7,1,4)

Oct 30 2019 9:34 PM UTC

}// 54/140

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Low Res #default

u/katkip

It has already done but this is shorter
u/robbyg

I scrolled through like 8 pages of defaults first... there's only so much I can do. :)

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robbyg

remix of d/7367 by u/robbyg

function u(t) {

r=Math.random
t||(A=[...Array(99)].map(a=>[r()*2e3,r()*2e3,r()*7]))
A.map(a=>x.fillRect(a[0]+=C(z=a[2]+=r()-.5)*2,a[1]+=S(z)*2,3,3))

May 21 2019 2:15 AM UTC

}// 132/140

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I don't really know where I'm going with these #walkers yet.

u/donbright

love it
u/magna

Golfed a bit and added variable walker size: d/14069
u/joeytwiddle

I don't think they know where they are going either!

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robbyg

remix of d/13097 by u/KilledByAPixel

function u(t) {

Y=185
for(i=1e3;i--;x.fillStyle=R(i+90,0,Y))x.fillRect(10*Y*C(i-t),6*Y/(t+t)-187,86,86)

Apr 9 2019 6:30 PM UTC

}// 87/140

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87 pixel remix so there's room for future remixing. :)

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robbyg

remix of d/12540 by u/Ath0r

function u(t) {

c.width|=0
for(h=21;h--;)for(v=12;v--;){
x.beginPath()
for(i=8;i--;)x.lineTo(100*h+125*C(z=t+2.093*i),100*v+125*S(z))
x.stroke()
}

Feb 27 2019 3:03 PM UTC

}// 130/140

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Triangles for DAYS.

u/Ath0r

Cool! :)

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robbyg

function u(t) {

f=(X,Y,w)=>{var W=w/2,h=X-W,v=Y-W
x.rect(h,v,w,w)
if(W>9)f(h,v,W),f(h+w,v,W),f(h,v+w,W),f(h+w,v+w,W)}
t||f(960,540,540)
x.fill('evenodd')

Feb 11 2019 1:07 AM UTC

}// 137/140

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#recursive squares

u/robbyg

Thanks u/katkip for the recursive examples
u/katkip

Beautiful
u/robbyg

133: f=(X,Y,w,W,h,v)=>(W=w/2)>4&&(x.rect(h=X-W,v=Y-W,w,w),f(h,v,W),f(h+w,v,W),f(h,v+w,W),f(h+w,v+w,W)) t||f(960,z=540,z) x.fill('evenodd')

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