Dweets awesomed by u/andrea270872

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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andrea270872

function u(t) {

I=t*3320%2e3;J=(t*94)%1e3
i=A=I/520-2;B=J/520-1
while((A*A+B*B<4)*(i++<40))[A,B]=[A*A-B*B+.3,2*A*B+.02]
x.globalAlpha=.6
x.fillRect(I,J,i,i)

Mar 7 2019 6:22 PM UTC

}// 140/140

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Ghost of Julia ver4 (with alpha!)

u/f8f82804

#dither #halftone #fractal

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andrea270872

remix of d/12677 by u/andrea270872

function u(t) {

I=(t*3350)%2e3;J=(t*94)%1e3
A=I/900-1;B=J/500-1
i=0;while(((A*A+B*B)<4)&&(i<25))[A,B]=[A*A-B*B-.8,2*A*B+.2,i++]
x.fillRect(I,J,i*=2,i)

Mar 7 2019 5:38 PM UTC

}// 134/140

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Ghost of Julia ver3

u/f8f82804

#dither #halftone #fractal

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andrea270872

function u(t) {

I=(t*3350)%2e3;J=(t*94)%1e3
A=I/1e3-1;B=J/600-1
i=0;while(((A*A+B*B)<4)&&(i<25))[A,B]=[A*A-B*B-.8,2*A*B+.2,i++]
x.fillRect(I,J,i,i)

Mar 7 2019 5:29 PM UTC

}// 131/140

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Ghost of Julia ver2

u/andrea270872

/* LOGIC The point (I,J) depends on t and scans the screen from top-left to bottom-right, then restarts. It also hops of circa 50 pixels in both directions. The point (A,B) is a scaled and translated version of (I,J); (A,B) is centered arund (0,0) and goes approximately from -1,5 to +1.5 in both directions. The loop is a simplified version of the Julia iterated fractal loop: - i starts from 0, and goes max to 25 iterations, and the point starts at z=A+i*B - the function being computed is: Z=Z^2+(-0.8,+0.2) separating real and imaginary part, the formula is: A = A*A-B*B-.8 AND B = 2*A*B+.2 and the notation [A,B] saves me from using a temp variable. The loop exits if: - i is 25 or - distance of (A,B) from (0,0) is more than 2 */
u/f8f82804

#dither #halftone #fractal

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aoneill01

remix of d/12660 by u/aoneill01

function u(t) {

c.width|=π=3.14;for(φ=0;φ<2*π;φ+=.01)z=f=>Math.abs(f(3*φ)/f(t))**f(t),r=99*(z(C)+z(S)),x.lineTo(962+r*C(φ+t),514-r*S(φ+t));x.fill()

Mar 7 2019 2:19 PM UTC

}// 131/140

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andrea270872

function u(t) {

K=55
T=t*60*K
I=T%2e3
J=(T/2e3*K)%1e3
A=I/1e3-1,B=J/600-1
for(i=0;i<15;i++)[A,B]=[A*A-B*B-.8,2*A*B+.2]
if((A*A+B*B)<99)x.fillRect(I,J,K,K)

Mar 7 2019 12:47 PM UTC

}// 138/140

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Ghost of Julia

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LimeLaser

remix of d/12626 by u/qm3ster

function u(t) {

r=Math.random
p=t?p.map(([u,v,i,j]=[99,99,1,1])=>[u+i,v+j,i+(960-u)/1e4+r()-0.5,j+(540-v)/1e4+r()-0.5,x.fillRect(u,v,4,4)]):[...Array(99)]

Mar 7 2019 7:30 AM UTC

}// 138/140

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99 Accelerating Particles (thank you qm3ster)

u/LimeLaser

I have been hoping to make a particle system that persists individual positions and velocities for a while now. With the code golfing qm3ster has done, I can finally do it!

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Porpr

function u(t) {

c.width^=0
k=t
w=960
h=600
for(i=0;i<99;i++){k+=5.5
l=5*i
i%2==0?x.closePath():0
x.lineTo(w+C(k)*l,h+S(k)*l)}x.arc(w,1e3,500,1,0)
x.stroke()

Mar 7 2019 2:56 AM UTC

}// 140/140

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Windmill

u/Porpr

How do I mark things as a remix?
u/pavel

You have to make your dweet by editing the one you want to remix and a submit button shows up.
u/Porpr

I see now, thanks.

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tomxor

function u(t) {

eval(unescape(escape`瑼簨挮潵瑥版呍䰽✾㱩湰畴⁩搽漾✬昽湥眠䙬潡琶㑁牲慹⠱⤬椽湥眠䉩杉湴㘴䅲牡礨昮扵晦敲⤬漮潮扬畲㵟㴾学嬰崽漮癡汵攬漮癡汵攽楛そ⹴潓瑲楮木㈩⹰慤却慲琨㘴ⰰ⤮牥灬慣攨⼨㼼㵞⹻ㄲ紩⽧Ⱗ‧⥝⤻`.replace(/u(..)/g,"$1%")))

Mar 7 2019 2:14 AM UTC

}// 138/140

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Float64 Encoder #application

u/tomxor

Enter a number and click away to get the underlying binary64 IEEE754 encoding with a space separating the exponent and significand.
u/tomxor

This uses the new proposed BigInt64Array typed array view to access the binary encoding, so it currently only works in latest chrome.

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Porpr

function u(t) {

c.width^=0
l=a=0
for(i=0;i<2e3;i++){
a+=2.0944+S(t*0.6)*.004
l+=0.2
x.strokeStyle="DARKRED"
x.lineTo(960+C(a)*l,600+S(a)*l)}x.stroke()

Mar 7 2019 1:36 AM UTC

}// 134/140

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TriangleVortex

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tomxor

remix of d/12666 by u/tomxor

function u(t) {

f=_=>S((X*X+Y*Y)**.5*3+t)
eval(unescape(escape`景爨爽ㄶⱣ⹷楤瑨㵩㵲⨳㈻椭㴲⽲㭸⹦楬汒散琨爪⡘⨲⭙⬱㘩Ⱳ⨨堯㈭夫娩ⰶⰹ⤩娽㄰ⵦ⡘㵩┸ⴴⱙ㵩⽲⼴ⴴ⤬砮晩汬却祬攽恈卌⠤筚⨶ぽⰹ㤥ⰵ〥总`.replace(/u(..)/g,"$1%")))

Mar 6 2019 11:49 PM UTC

}// 140/140

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Surface Plot 2 #application

u/tomxor

Mini surface plotter v2! With an actual useful range and colour map this time.
u/tomxor

f=_=>S((S(X)**2+S(Y)**3)*3.14+t)**2
u/magna

Great!
u/mildlybean

Cool!
u/tomxor

#app

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