Dweets awesomed by u/yokljo

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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nender

function u(t) {

c.width=2e3;x.lineWidth=6;v=1e3;b=187;n=864;for(i=0;i<9;i++){r=n-(n/=1.7);v+=S(i*t)*r;b+=C(i*t)*r;x.beginPath();x.arc(v,b,n,0,8);x.stroke()}

Mar 5 2019 3:48 PM UTC

}// 140/140

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saved a few more chars and upped the line width

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tomxor

function u(t) {

c.width=w=96
for(i=5e3;X=i%w,Y=i/w,i--;x.fillRect(X+2*Z,Y+4*Z,.6,1))Z=(.5+S(i/15+t*2)/2)*S(S(Y/8+t)+S(X/24+t)+t),Z=C(2*Z+S((X&Y)/(1+Z*Z))/8)

Mar 2 2019 7:46 PM UTC

}// 140/140

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Fractal Lake

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pavel

function u(t) {

for(k=2e3;i=S(t+k),j=S(i*k--);f&&x.fillRect(960+540*i,540*++j,9,4))d=1-i*i-j*j,f=d**.5*2-i-j,x.fillStyle=R(g=8*f**3,g,g+28*f,1-.05/d)

Feb 28 2019 7:26 PM UTC

}// 133/140

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ds0

remix of d/12186 by u/ds0

function u(t) {

c.width|=r=540
for(i=r;i--;){Y=r-(2*i)
W=(2*(r**2-Y**2)**.45)
x.fillStyle=R(255*S(t+111*i))
x.fillRect(960-(W/2)+.8*r*S(t+111*i),540-Y,W,3)}

Feb 6 2019 3:00 AM UTC

}// 140/140

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Red Visitor

u/katkip

??
u/Galaxtone

He keeps swapping

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Xen

remix of d/12172 by u/robbyg

function u(t) {

for(Z=99,i=9;i--;)for(v=200;v--;x.fillRect(520+S(t+v/Z)*400+i*Z,v*5,Z*v/Z,5))x.fillStyle=`hsla(${i*Z+v+t*Z},50%,50%,.1`

Feb 5 2019 4:45 PM UTC

}// 119/140

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u/katkip

#color

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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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joeytwiddle

function u(t) {

for(c.width|=i=999;i--;)a=i-t,h=i/580-.25,r=(h<1.2)*150+(h>0&&h<1)*400*S(h*3),x.fillStyle='#e'+i,x.fillRect(960+r*S(a),50+i+r*C(a)/5,70,30)

Feb 4 2019 3:17 PM UTC

}// 139/140

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Gong xi fa chai!

u/katkip

#cute
u/joeytwiddle

Happy Chinese New Year of the Pig!

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rodrigo.siqueira

function u(t) {

X=Y=0
for(c.width|=i=1e3;i--;){
X=X*C(2*t+Y*2)+Y/4
Y=C(X+Y+X+t/3)-S(i+X+t)/3
x.fillRect(960+X*820,540+Y*400,5,5)
}

Feb 4 2019 2:16 AM UTC

}// 114/140

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Interaction of live attractors

u/katkip

WOWWW #attractor AWESOME
u/donbright

WOAH

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yokljo

remix of d/12000 by u/yokljo

function u(t) {

for(j=22;j--;)for(g=j*90,i=99;i-->-120;)x.fillStyle=`hsl(${j*2e3+t*j},30%,${i<0?50:j+i/7}%)`,x.fillRect(i<0?g:g+S(i/3+t*9)*i/2,i*5+600,90,5)

Feb 1 2019 11:36 PM UTC

}// 140/140

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u/katkip

#waves

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katkip

remix of d/12067 by u/Kyoushu

function u(t) {

x.clearRect(0,0,1920,1080);for(i=0;i<=1800;i+=0.9){b=t*C(t+i);x.fillRect(S(b)*(960-i)+960,C(b*2)*(540-i/2)+540,10,10);}

Feb 1 2019 2:03 PM UTC

}// 119/140

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u/SMON

whoaaaaa...that is glorious
u/Kyoushu

I love it, it's like some interdimensional squid breaking through
u/katkip

yep <3

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