Hot dweets by u/Exca

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: #ScaryMovies

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Exca

function u(t) {

for(i=0;i<5184;i++){q=i%96,w=i/96|0
y=S(q*C(t)/5+w*S(t)/6)*t*9
o=S(q/7+w/4)*t*9
x.fillStyle=R(y^o,y|o,y+o+199)
x.fillRect(q*20,w*20,20,20)}

Aug 31 2018 12:12 PM UTC

}// 139/140

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Fixed previous one. Wait for a few seconds for effect to start.

u/magna

#waitforit

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Exca

remix of d/6153 by u/BackendForth

function u(t) {

c.width|=0
for(i=77;i--;){q=i%7
if(('¾i989i¾'.charCodeAt(e=i/7|0)>>q)%2)x.fillRect(e*90*S(t)+900+S(t)*280,-q*90+840+C(t)*180,90,90)}

Jan 17 2018 9:15 PM UTC

}// 136/140

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u/joeytwiddle

#alien #spaceinvaders #sprite

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Exca

remix of d/6122 by u/tillsc

function u(t) {

o=240
b=S(t)
x.drawImage(c,-9,-5,1937+b,1090+b)
for(i=400;i--;)x.fillRect(S(i+t)*o+o*4,C(i-t)*o+o*2,3,3)
x.fillStyle=R(b*o,C(t)*o,S(t/4)*o)

Jan 17 2018 3:54 PM UTC

}// 140/140

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u/Qwitter

Wow the color sequence!

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Exca

function u(t) {

with(x){drawImage(c,0,6)
fillStyle="#fff"
fillRect(0,0,1920,6)
fillStyle=R()
w=S(t)*C(t^7)*400+480
fillRect(0,0,w,9)
fillRect(1920-w,0,w,9)}

Jan 16 2018 5:02 PM UTC

}// 140/140

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u/sigveseb

cool
u/joeytwiddle

#pattern #shape #face #vase #illusion

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Exca

function u(t) {

x.drawImage(c,6,0)
x.fillStyle="#fff"
x.fillRect(0,0,6,999)
x.fillStyle=R()
q=w=>x.fillRect(0,S(t+w)*399*S(w)+540,9,w)
for(i=9;i--;)q(i*4)

Jan 14 2018 12:53 AM UTC

}// 138/140

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u/dogspace

very nice

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Exca

remix of d/5768 by u/ellisk1

function u(t) {

q=w=>{x.fillStyle=R(280-w,150-w);x.fillRect(S(n=k+t/2)*w*4+960,C(n)*w*4+540,w+5,w+5)}
for(k=29;k--;)
for(i=0;i<59;i++)
q(i+(t+k/3)*200%300)

Jan 9 2018 6:42 PM UTC

}// 139/140

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u/magna

Love this!
u/joeytwiddle

#glow

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Exca

function u(t) {

c.width|=e=y=>x.fillRect(k,720-y,50,y<0?3:8)
for(i=32;i--;){w=S(i*C(t+i/7))*(32-i)
w*=w/2
while(w>0){x.fillStyle=R(w-=8)
k=i*60
e(w)
e(-w)}}

Jan 5 2018 2:05 PM UTC

}// 140/140

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Thanks for helping with the last few bytes go to poro

u/sigveseb

the reflections really make this one!
u/joeytwiddle

Very cool. Here is a retro-spect-rum: d/2411

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Exca

function u(t) {

c.width|=0,o=980,p=540
w=s=>x.lineTo(C(q=i+s+t)*s*o+o,C(i+q)*s*p+p)
for(i=20;i--;){x.moveTo(o,p)
for(j=18;j--;) w((j-9)/9*S(t+i))}x.fill()

Jan 6 2018 7:38 PM UTC

}// 138/140

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Exca

function u(t) {

c.width|=l=Math.hypot
for(i=3e3;i--;){q=i%99,w=i/99,a=S(t)*29+70,s=C(t)*55,b=l(q-a,w-s)+l(q-a/3,w-s/5),n=S(b)*19,x.fillRect(q*20,w*36,n,n)}

Jan 4 2018 7:15 AM UTC

}// 139/140

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Exca

remix of d/5392 by u/Exca

function u(t) {

c.width|=q=(w,o)=>{b=S(w/10+t)*7+960+o,v=180+w*15
x.fillStyle=R(0,0,0,w/52)
x.fillRect(b,v,50,1080-v);}
for(j=54;j--;)q(j,S(t+j*.05)*900)

Jan 3 2018 6:12 PM UTC

}// 139/140

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u/CliffJonesJr

Mesmerizing.

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