Dweets awesomed by u/donbright

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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New_Core

function u(t) {

with(Math)p=.2*t%PI*2,g=6*p/4,r=pow(abs(cos(g)/2)**8+abs(sin(g)/3)**4,-1/1),X=r*cos(p),Y=r*sin(p),x.fillRect(X+960,Y+540,9,9)

Mar 24 2017 11:02 AM UTC

}// 125/140

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based on the superformula https://en.wikipedia.org/wiki/Superformula, so playing around with the numbers some other shapes may apear.

u/donbright

excellent
u/New_Core

s=140;with(Math)p=.2*t%PI*2,g=6*p/4,r=pow(abs(cos(g)/1)**2+abs(sin(g)/5)**4,-1/6),X=r*cos(p),Y=r*sin(p),x.fillRect(X*s+960,Y*s+540,9,9)
u/New_Core

s=300;with(Math)p=.2*t%PI*2,g=8*p/4,r=pow(abs(cos(g)/1)**2+abs(sin(g)/5)**4,-1/15),X=r*cos(p),Y=r*sin(p),x.fillRect(X*s+960,Y*s+540,9,9)
u/13thptr

#plot

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mxfh

remix of d/2285 by u/mxfh

function u(t) {

c.width|=f=120
for(X=16;X--;)for(Y=8;Y--;d=f/(1.21+S(t*4-1.57)/4.8),x.fillRect(e=-d/2,e,d,d))
x.setTransform(a=S(t),b=C(t),-b,a,X*f+f,Y*f+f)

Mar 23 2017 11:59 PM UTC

}// 140/140

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scottglz

function u(t) {

with(Math)for(X=43;X--;)for(Q=Y=31;Y--;x.fillRect(X*Q,(Y+2+S(X/6))*Q,Q,Q))D=min(abs(X-15),abs(Y-15)),x.fillStyle=D<2?'#026':D<4?'#fff':'red'

Mar 23 2017 7:49 PM UTC

}// 140/140

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Everybody loves Norwegian flags.

u/mxfh

nice, https://www.dwitter.net/d/2113 check the ratios link in the dweets comments
u/scottglz

Right, I'm using the 6,1,2,12 ratios?
u/scottglz

Oh, her, I thought I was, but I see now they got messed up somewhere. Thanks.
u/scottglz

Grr not her

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thespite

remix of d/2280 by u/thespite

function u(t) {

w=1920,h=1080,c.width=w,d=.5;for(a=-d;a<d;a+=.02)for(b=-d;b<d;b+=.02){x.fillRect((d+a)*w,(d+b+.15*C(10*Math.sqrt(a*a+b*b)-2*t))*h,40,10)}

Mar 23 2017 6:43 PM UTC

}// 137/140

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thespite

function u(t) {

w=1920,h=1080,c.width=w,d=.5;for(a=-d;a<d;a+=.01)for(b=-d;b<d;b+=.01){x.fillRect((d+a)*w,(d+b+.15*C(10*Math.sqrt(a*a+b*b)-2*t))*h,20,10)}

Mar 23 2017 6:35 PM UTC

}// 137/140

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Hey! I made something!

u/recursive

Nice. Reminds me of https://www.dwitter.net/d/1957
u/donbright

love the shading

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scottglz

remix of d/2265 by u/tapgiles

function u(t) {

with(x)lineWidth=3,fillStyle=`hsl(${t*99%360},100%,50%)`,beginPath(),arc(t*1e4%1920,0,100,0,7),fill(),stroke(),drawImage(c,0,0,1920,1123.2)

Mar 23 2017 5:51 PM UTC

}// 139/140

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keithclark

function u(t) {

for(a=c.width|=0;l=C(t),m=S(t),d=C(a)*S(b=a*1.2502),e=S(a--)*S(b);x.fillRect((d*l+e*m)*h+960,C(b)*h+540,i=h/40-5,i))h=900/(2+(e*l-d*m))

Mar 23 2017 5:49 PM UTC

}// 135/140

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u/recursive

Superbly golfed
u/keithclark

Even smaller: https://www.dwitter.net/d/2298
u/donbright

bravo

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joseprio

remix of d/2257 by u/joseprio

function u(t) {

C=98;for(i=1e3;i--;)x.fillStyle="#"+(i%2?6:3)*C,x.setTransform(1,.5-i%2,0,1,i%C*C-i,1.5*i),x.fillRect(0,i%2*49,C,C)

Mar 23 2017 1:22 PM UTC

}// 116/140

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Golfed a bit.

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Jenky

function u(t) {

c.width=c.clientWidth;m=!t?[0,0]:m;c.onmousemove=e=>m=[e.layerX,e.layerY];x.font="1em A";x.fillText(m,...m)

Mar 23 2017 2:33 AM UTC

}// 107/140

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Compact-ish MousePos retrieval, fixed compatibility, golfed

u/recursive

ooh nice, no more 3.3

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Jenky

function u(t) {

c.onmousemove=e=>m=[e.x*3.4,e.y*3.4];x.drawImage(c,C(t)*.2-2,S(t)*.2-2,1924,1084);x.fillStyle=`hsl(${t*600},99%,50%)`;x.fillRect(...m,8,8);

Mar 22 2017 11:37 AM UTC

}// 139/140

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Move the mouse around over the canvas for rainbows~

u/donbright

finally looked at this one in Chrome... breahtaking
u/donbright

breath even

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