Hot 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) {

x.fillRect(0,0,a=2e3,a)
for(i=a;i--;)x.clearRect(960+C(z=i/3-t/i*99)*i/2,540+S(z)*i/2,5,5)

Oct 11 2019 8:59 PM UTC

}// 90/140

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robbyg

remix of d/15802 by u/robbyg

function u(t) {

for(i=2304,Z=30;i--;x.fillRect(H*Z,V*Z,Z,Z))H=i%64,V=i/64|0,A=Math.atan2(V-18,H-32),x.fillStyle=S(Z*t+5*A)>0>0?'#1112':'#eed6'

Sep 27 2019 3:22 PM UTC

}// 126/140

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Staring at the ceiling fan.

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robbyg

remix of d/15800 by u/zooi

function u(t) {

for(i=3e3,c.width|=Z=30;i--;S(8*t+8*A)>0&&x.fillRect(H*Z,V*Z,Z,Z))H=i%65,V=i/65|0,A=Math.atan2(V-18,H-32),x.fillStyle=`hsl(${A*57},70%,60%)`

Sep 25 2019 9:48 PM UTC

}// 140/140

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Remixed for fullscreen goodness and color. 🌈⭐

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robbyg

remix of d/15743 by u/katkip

function u(t) {

c.width|=0
for(Y=13;Y--;)for(X=12;X--;)x.fill(new Path2D(`M${X*180-40} ${Y*90-30+S(X*C(t)+Y*S(t))*3}l90,45,l-90,45l-90-45z`))

Sep 20 2019 2:01 PM UTC

}// 125/140

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Unpacked and simplified (for better or worse)

u/robbyg

#path2d
u/katkip

good idea

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robbyg

remix of d/15750 by u/robbyg

function u(t) {

for(Y=13;Y--;)for(X=12;X--;)x.fillStyle=`hsl(${(X+Y*3)*66-t*33},70%,60%`,x.fill(new Path2D(`M${X*180-30} ${Y*90-45}l90,45,l-90,45l-90-45z`))

Sep 20 2019 6:56 PM UTC

}// 140/140

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Minus wiggles, plus colors

u/robbyg

#path2d

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robbyg

function u(t) {

for(i=2304,Z=30;i--;x.fillRect(H*Z,V*Z,Z,Z))H=i%64,V=i/64|0,x.fillStyle=R(a=T(C(H)-S(V)-t*2)>0&&Math.random()>.8?255:128,0,0,.05)

Sep 17 2019 8:01 PM UTC

}// 129/140

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Lava

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robbyg

remix of d/15668 by u/mildlybean

function u(t) {

for(c.width=X=20;X--;)for(Y=11;Y--;)x.fillRect(X,Y,a=S(X+t-Y),C(Y+t+a))

Sep 12 2019 8:51 PM UTC

}// 71/140

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Beats me. I just thought it looked pretty.

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robbyg

function u(t) {

for(c.width|=i=9;i--;)x.stroke(new Path2D(`M${560+i*100+S(t)*300} 440h50v200h-50z`))

Sep 6 2019 3:24 PM UTC

}// 84/140

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Stroked #default using Path2D. Lots of room for activities.

u/robbyg

#path2d

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robbyg

function u(t) {

t||(Z=150,V=Math.random()*5)
x.beginPath()
if(t<4.01)P=t*180|0,x.fillStyle=R(I=P/3%240,I,I),x.fill(x.ellipse(960,900-P,Z+=C(t*V),50,0,0,7))

Aug 26 2019 9:33 PM UTC

}// 139/140

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Vases, inspired by https://codepen.io/Gthibaud/pen/gOYwNPM

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robbyg

function u(t) {

a=t?a+=(Math.random()*2-1):400
x.fillStyle='#000a'
x.fillRect(960+C(t)*a,540+S(t)*a,9,9)

Aug 21 2019 3:30 PM UTC

}// 88/140

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Tracing a circle.

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