Dweets awesomed by u/GandalfUFR

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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GandalfUFR

function u(t) {

a=99;b=7;d=a-b;f=93*t;e=f*b/a;g=f*d/a
z=d*C(e)-b*5*C(g);y=d*S(e)+b*5*S(g)
for(i=0;i++<9;)x.fillRect(191*i+z,540+y,5,5);x.translate(8*S(f),0)

Apr 27 2019 2:36 PM UTC

}// 140/140

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Let's pixel it together ...

u/joeytwiddle

Sauron gave the Nine rings to powerful men. All of them fell under the rings' dominance, and they became the Nazgûl (Ringwraiths), spirits of terror whom Sauron could command.

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GandalfUFR

function u(t) {

a=60;b=6;d=a-b;f=10*t;e=f*b/a;g=f*d/a
z=d*C(e)-b*4*C(g)
y=d*S(e)+b*4*S(g)
for(i=0;i++<10;)for(j=0;j++<5;)
x.fillRect(180*i+z,180*j+y,3,3)

Apr 27 2019 2:02 PM UTC

}// 137/140

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If you like flowers ...

u/katkip

#flowers

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GandalfUFR

function u(t) {

a=350;b=40;d=a-b;f=10*t;e=f*b/a;g=f*d/a
z=d*C(e)+b*4*C(g)
y=d*S(e)+b*4*S(g)
x.fillStyle=R(255*C(t),0,255*S(t))
x.fillRect(960+z,540+y,32,32)

Apr 27 2019 12:23 PM UTC

}// 140/140

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And so on ...

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GandalfUFR

function u(t) {

a=360;b=32;d=a-b;f=20*t;e=f*b/a;g=f*d/a
z=d*C(e)+b*5*C(g)
y=d*S(e)-b*5*S(g)
x.strokeStyle=R(256-12*t)
x.lineTo(960+z,540+y)
x.stroke()

Apr 27 2019 11:40 AM UTC

}// 134/140

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Hypocycloids can also burn out ...

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GandalfUFR

function u(t) {

a=357;b=43;d=a-b;f=20*t;e=f*b/a;g=f*d/a
z=d*C(e)+b*5*C(g)
y=d*S(e)-b*5*S(g)
x.strokeStyle=R(127+128*S(2*t))
x.lineTo(960+z,540+y)
x.stroke()

Apr 27 2019 11:32 AM UTC

}// 140/140

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A glowing hypocycloid ... don't call it a donut ...

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pavel

remix of d/13492 by u/KilledByAPixel

function u(t) {

for(c.width%=i=3600;i--;x.fillRect(535+S(t)*300+i%9*99+i/9%10*5/a,440+(i/90|0)*5-40/a,6,6))a=1/(1+7**(t-5-S(i*i)-i/500)),x.globalAlpha=a*a

Apr 27 2019 9:29 AM UTC

}// 138/140

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mr #default I don't feel so good #tribute

u/pavel

Awesome idea, I just had to #uncompress it.
u/pavel

#uncompressed
u/KilledByAPixel

Wow, better thenthe original and uncompressed. Damn you pavel.
u/katkip

#thanos is my daddy

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Jezza

remix of d/13497 by u/Jezza

function u(t) {

c.width|=0;for(Y=1188;Y-=27;){x.moveTo(0,Y);for(X=1;X<13;X++)x.lineTo(X*160+(X&1?C(2*t+Y/108)*120:0)*(X&2?1:-1),Y-(X&1?108:0));x.stroke()}

Apr 27 2019 9:20 AM UTC

}// 138/140

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Tweak. (via https://old.reddit.com/r/generative/comments…)

u/aleamb

fucking awesome!
u/Purpzie

Shaved 10 characters but it's super laggy: for(c.width|=0,i=572;Y=(0|i/13)*27,X=(572-i)%13,i--;x.stroke())x.lineTo(X*160+(X&1?C(2*t+Y/108)*120:0)*(X&2?1:-1),Y-(X&1?108:0))
u/Purpzie

Less laggy version that's 4 characters shorter instead of 10: for(c.width|=0,Y=1188;x.moveTo(0,Y),Y-=27;x.stroke())for(X=0;X++<13;)x.lineTo(X*160+(X&1?C(2*t+Y/108)*120:0)*(X&2?1:-1),Y-(X&1?108:0))

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GandalfUFR

function u(t) {

z=Math.random();for(i=0;i<6.3;i+=.03){
a=480*t*S(i);b=270*t*C(i);
x.fillStyle=`hsl(${360*z},99%,50%)`
x.fillText(t,960-a,540-b);x.rotate(t)}

Apr 27 2019 8:48 AM UTC

}// 140/140

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pavel

remix of d/13487 by u/KilledByAPixel

function u(t) {

for(i=t?c.width|=d=_=>u[j=q&-64|p>>6]=-!u[j]|1:(p=q=540,r=7,s=4);i--;)u[i]||x.fillRect(i?i%64*64:p+=r*=d(p+=r),i?i:q+=s*=d(q+=s),z=i?64:9,z)

Apr 27 2019 4:26 AM UTC

}// 140/140

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#breakout #tribute

Show more comments…
u/pavel

Had to make some visual sacrifices to get this #uncompressed
u/pavel

I discovered p+=r*=d(p+=r);q+=s*=d(q+=s) as part of messing around with this. Why does it work?
u/pavel

:)
u/KilledByAPixel

Oh wow, nice! That's the code that updates the position, velocity and applies collision for x and y. It needs to call the d function to check its colliding and also set the block to 1 if it does. It needs to check x and y separately so it knows which side to bounce off
u/pavel

Notice how d only takes one argument, and it ignores it.
u/KilledByAPixel

I see what you did there. So many great tricks in this one.
u/pavel

p+=r*=d(p+=r) the inner p+=r increments p and d ends runs with that value, however the outer p+= caches the old value of p so when d resolves the inner p+=r is silently ignored!
u/pavel

#physics

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Jezza

function u(t) {

for(c.width&=p=-4;p<4;p+=.075)for(q=-2;q<2;q+=.075)x.fillRect(960+p*270,540+q*270,C(p*p-q*q+p+t)*15,S(2*p*q+q+t)*15)

Apr 27 2019 1:43 AM UTC

}// 116/140

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Messing about with the mandelbrot z=z^2+c

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