Dweets awesomed by u/iverjo

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: #Food

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iverjo

remix of d/387 by u/iverjo

function u(t) {

for(w=i=955;i--;)x.fillStyle=R(a=w*!i,a,a,.1+i),x.fillRect(!a*(w+w*S(d=i/42)*S(b=42*i+t)),!a*w*(C(d)+T(t/9+d)),s=18/(S(d)*S(b+4.7)+2)+8*a,s)

Aug 1 2016 12:54 AM UTC

}// 140/140

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iverjo

remix of d/387 by u/iverjo

function u(t) {

for(i=1e3;i--;)x.fillStyle=R(a=255*!i,a,a,.05+i),x.fillRect(!a*(960+800*S(b=i/42)*S(i%T(t+b)+t)),!a*(540+460*C(b)),s=19/(S(b)*S(t)+2)+8*a,s)

Jul 31 2016 11:50 PM UTC

}// 140/140

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A combination of http://dweet.dwitter.net/id/387?autoplay=1 and http://dweet.dwitter.net/id/385?autoplay=1

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iverjo

remix of d/312 by u/iverjo

function u(t) {

c.width=960;x.lineWidth=500;x.fillRect(2e3-t*955%2e3,W=230,80,80);x.strokeStyle=R(W,W);x.arc(100,270,250,G=.3-.5*S(t*6+2),6.3-G);x.stroke()

Jul 30 2016 3:25 AM UTC

}// 139/140

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#pacman

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iverjo

remix of d/183 by u/chunnoo

function u(t) {

t++;x.beginPath();r=128*t;w=960;h=540;p=24*Math.PI*t+t;q=p/60%t;x.moveTo(r*C(p-q)+w,r*S(p-q)+h);x.lineTo(r*C(p)+w,r*S(p)+h);x.stroke()

Jul 29 2016 5:14 PM UTC

}// 134/140

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iverjo

function u(t) {

for(i=7;i--;)x.fillStyle=R(a=255*!i,a,a,.02+i),r=S(t/7),x.fillRect(!a*(960+900*S(t+i)*r),!a*(515+500*C(t+i)*r),c=20+8*a,c)

Jul 29 2016 5:10 PM UTC

}// 122/140

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This might be a good starting point for creating dweets with rectangles that leave trails. For i = 0 a large, white, semi-transparent rectangle is applied to the entire canvas. For i = 1,2,3,4,5,6 small, black, opaque rectangles are drawn.

u/iverjo

#spiral

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iverjo

remix of d/379 by u/iverjo

function u(t) {

c.width=960;for(i=1e3;i--;)b=T(t+i/42),s=7/(S(i/42)*S(t)+2),x.fillRect(480+400*S(i/42)*S(i%b+t),270+230*(C(i/42)),s,s)

Jul 29 2016 4:59 PM UTC

}// 118/140

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iverjo

function u(t) {

for(i=2e3;i--;)x.fillStyle=R(a=255*!i,a,a,i/3e5),x.fillRect(!a*(956+968*S(i+t)),!a*(535+540*C(i/42)),c=9+8*a,c)

Jul 29 2016 4:19 PM UTC

}// 111/140

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Let's call this one "60s CRT TV". Wait around 20 seconds to let the effect converge.

u/iverjo

Featuring vignette and scanlines/pixelated grid
u/iverjo

#texture
u/iverjo

#waitforit

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mathmania

function u(t) {

c.width=1920;for(i=0;i<9;i++)
{x.fillRect(400+i*100,400+100*T(t+(Math.PI-i)),50,200)}

Jul 29 2016 3:46 PM UTC

}// 85/140

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u/iverjo

Simple yet pleasing
u/taupelink

#default

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3bl3gamer

function u(t) {

c.width=256;for(i=256;i--;)for(j=142;j--;x.fillRect(i,j,1,k/14))for(a=b=0,k=18;k--&&b*b<4;)q=a*a-b*b+i/96-2+C(t*2),b=2*a*b+j/96-1+S(t*2),a=q

Jul 29 2016 7:32 AM UTC

}// 140/140

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u/iverjo

Cool!
u/iverjo

135 characters: for(c.width=i=256;i--;)for(j=142;j--;x.fillRect(i,j,1,k/14))for(a=b=0,k=18;k--&&b*b<4;a=q)q=a*a-b*b+i/96-2+C(t*2),b=2*a*b+j/96-1+S(t*2)

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iverjo

remix of d/79 by u/iverjo

function u(t) {

c.width=960;for(i=2e3;i--;)s=7/(S(i/42)*S(2.79*i+t-1.57)+2),x.fillRect(480+460*S(i/42)*S(2.79*i+t),270+160*(C(i/42)+T(t/9+i/42)),s,s)

Jul 29 2016 12:55 AM UTC

}// 133/140

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Golfed version (120 characters): c.width=960;for(i=2e3;i--;)b=2.79*i+t,x.fillRect(480+460*S(a=i/42)*S(b),270+160*(C(a)+T(t/9+a)),s=7/(S(a)*S(b+4.7)+2),s)

u/iverjo

118 characters: c.width=960;for(i=2e3;i--;)x.fillRect(480+460*S(d=i/42)*S(b=2.79*i+t),270+160*(C(d)+T(t/9+d)),s=7/(S(d)*S(b+4.7)+2),s)
u/iverjo

115 characters: c.width=960;for(i=2e3;i--;)x.fillRect(480+460*S(d=i/42)*S(b=2.79*i+t),270+160*(C(d)+T(t/9+d)),s=7/(-S(d)*C(b)+2),s)
u/iverjo

114 characters: c.width=960;for(i=2e3;i--;)x.fillRect(480+460*S(d=i/42)*S(b=2.79*i+t),270+160*(C(d)+T(t/9+d)),s=7/(S(d)*C(b)+2),s)

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