Top #circlechallenge dweets

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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ersagun

remix of d/18372 by u/KilledByAPixel

function u(t) {

x.fillRect(960-t*200,540-(w=(t*(2-t))**.5*200),4,w*2)

Apr 21 2020 6:59 PM UTC

}// 53/140

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Is this ok?

u/BriSeven

#circlechallenge

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New_Core

function u(t) {

c.style.filter=`blur(${30-30*S(t)}px)contrast(99)`
x.fillRect(620,240,680,600)

Apr 21 2020 1:33 PM UTC

}// 78/140

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with cutting edge technology #circlechallenge

u/New_Core

${5-5*S(t)}vw for the blur works better for fullscreen also..
u/lionleaf

Haha, love the pun

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sigveseb

remix of d/18368 by u/veubeke

function u(t) {

t||x.translate(960,540);x.rotate(0.005);x.fillRect(-1,-300,2,600);

Apr 21 2020 12:24 PM UTC

}// 66/140

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#circlechallenge

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BriSeven

remix of d/18368 by u/veubeke

function u(t) {

x.fillStyle="#0001"
x.fillRect(960,540,C(100*t|0)*300,S(100*t|0)*300)

Apr 21 2020 7:17 AM UTC

}// 69/140

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u/sigveseb

#circlechallenge

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magna

remix of d/24304 by u/cantelope

function u(t) {

x.fillText(x.font='20in ●',-4e3,1e3)

Nov 11 2021 6:10 AM UTC

}// 36/140

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#circlechallenge

u/rep_movsd

5e3

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donbright

function u(t) {

限=199
for(m=-限;m<限;m+=(2+t))for(n=-限;n<限;n+=(3+t)){
g=2*m*n
b=m*m+n*n
r=m*m-n*n
x.fillRect(1920/2+frame*g/b,1080/2+frame*r/b,1,1)}

Nov 2 2021 3:12 PM UTC

}// 130/140

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As part of #circlechallenge I go back to the old rational parametrization of the circle from Wildberger's "chromogeometry", which has elements of Euclid. Each frame draws rational points on a circle, and each frame the radius gets bigger. All of the patterns are a kind of optical illusion.

u/donbright

changing '2' and '3' to different numbers will give different patterns

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cantelope

function u(t) {

x.fillRect(960+((b=t?b:[0,h=520,h/22.7,0])[0]+=b[2]),h+(b[1]+=b[3]),9,9,b[2]-=b[0]/h,b[3]-=b[1]/h)

Nov 2 2021 12:30 PM UTC

}// 98/140

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#circlechallenge (no sine/cosine)

u/donbright

does fillrect have 6 parameters here?
u/cantelope

heh. it only looks at the first 4. i'm not actually saving any space by including 6 parameters, but why not? :)
u/cantelope

can you see how this circle method works? there is an array with 4 elements, the first 2 being positions (x,y), and the last 2 being analogous to a vector (in physics) with magnitude and direction, or simply (velocity-x, velocity-y). The velocity vector is added to the position coordinates once per frame and is itself adjusted in a way to create a perfectly circular "orbit" about the origin. Interestingly, this approach can be extended into 3 or more dimensions, and involve, obviously, more than 2 bodies. 3-body orbital chaos can be very interesting and beautiful, e.g. https://code.dweet.net/full/2w8z

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rep_movsd

function u(t) {

t||(M=O=.018,N=P=.9998,r=540)
if(t&&t<3.1)with(x){for(i=200,K=t*r,beginPath();--i;lineTo(K*B+r,K*A+r))A=O*N+P*M,B=P*N-O*M,O=A,P=B;stroke()}

May 15 2021 10:22 AM UTC

}// 139/140

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Look Ma - no trig!

u/rep_movsd

#Circlechallenge

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Xen

remix of d/18454 by u/ersagun

function u(t) {

t?x.rotate(!x.fillRect(0,0,5,399)):x.translate(960,540)

Apr 23 2020 2:37 PM UTC

}// 55/140

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#circlechallenge more Minimal

u/ersagun

just another way to exploit irrational numbers
u/Xen

Reality is chaos, Chaos is a fractal, All mostly infinite if you ask me

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KilledByAPixel

remix of d/18368 by u/veubeke

function u(t) {

x.strokeRect(960-(W=C(t)*300),540-(H=S(t)*300),2*W,2*H)

Apr 21 2020 7:54 AM UTC

}// 55/140

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u/sigveseb

#circlechallenge

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