Dweets awesomed by u/ArthurThuczsec

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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tactical_retard

remix of d/23621 by u/tactical_retard

function u(t) {

eval(unescape(escape`󡬽󫜽󟭭󙜲󟬱󟼨󫜥󜜭󛬵󚜪󜬺󚌱󚼭󫜥󜜭󛬵󚜪󜬊󬬽󚍍󟝍󨝴󪌩󛭲󨝮󩍯󫜊󩭯󬬨󪜽󨜽󜭥󜼻󪜭󛜻󣜮󨝢󬼨󦜭󝜰󜌫󡬨󦌯󦜩󚬵󜌰󚜾󝬰󚭴󙬦󚍸󛭦󪝬󫍒󩝣󭌨󦌬󦜬󜬰󛌲󜌩󚜩󦌽󬬨󚜪󨜬󦜽󬬨󮌮󩭩󫍬󤽴󮝬󩜽󨍨󬽬󚌤󮼶󜌪󭍽󛌹󞜥󛌳󝜥󨌩󚭡`.replace(/u../g,'')))

Sep 7 2021 3:41 PM UTC

}// 129/140

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better triangle wave function: F=m=>Math.abs(1-m%2)*2-1

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Joachim

function u(t) {

eval(unescape(escape`󮬽󨼮󭽩󩍴󪌽󜼰󜌊󘝴󟽰󟝛󧜺󬌮󭝮󬽨󪝦󭌨󮽹󞬱󛍲󞭺󙝓󚍴󚜪󞝽󚜊󩭯󬬨󪜠󫽦󘍰󚝷󪝴󪌨󪜩󮜾󜬰󜌿󬌮󬍯󬌨󚜺󮌮󩭩󫍬󤭥󨽴󚌰󛌰󛍺󛌱󜌰󚽹󚜬󮜯󟜮󞜵󛍸󛭦󪝬󫍓󭍹󫍥󟝒󚌰󛌰󛌰󛍲󛼹󞜩󒭸󛭦󪝬󫍓󭍹󫍥󟜧󘽢󨭢󙼬󮌮󩭩󫍬󚍸󛭡󬭣󚌲󜌬󜬰󛌹󛌰󛌷󚜩`.replace(/u../g,'')))

Sep 7 2021 2:25 PM UTC

}// 135/140

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fly by #night

u/Joachim

#moon

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taupelink

function u(t) {

k=120;for(i=k;i--;)
f=i*t,X=f*f%16,Y=X*f%9,
x.fillStyle=R(q=i*2,q*=1+S(X),q*=1-S(Y)),
x.fillRect(k*X,k*Y,k/5**t,i)

Sep 7 2021 2:03 PM UTC

}// 114/140

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d/23806 figure 1

Show more comments…
u/taupelink

this week i will give a line-by-line description here in comments and then maybe in a blog post
u/taupelink

definitely a blog post. the comments will come over time...don't feel obligated to come back and check this dweet for new comments
u/taupelink

k=120: for code golfing purposes, this variable plays multiple roles: loop iteration count per frame, scale factor for X&Y coordinates, width of each rectangle at the start of the animation
u/taupelink

for(i=k;i--;): establishes a loop where i counts down from 120 to 1. "i--" means, If i is 0, then stop here; otherwise, decrement i by 1
u/taupelink

f=i*t,X=f*f%16,Y=X*f%9: this code creates quasi-random decimals X (0.0-15.999) and Y(0.0-8.999). (Hat-tip to whoever suggested this technique... u/pavel ?) If you multiply the upper bounds by 120 each, you get the overall dimensions 1920x1080.
u/taupelink

x.fillStyle=R(red,green,blue): sets the RGB color value for fills. I will take each component one at a time...
u/taupelink

q=i*2: sets the red component to 2x the loop index, i.e. an even number from 2 to 240. This covers most of the possible range 0-255. The red value is tied to i but not to X or Y; rectangles everywhere have a random degree of red.
u/taupelink

q*=1+S(X): sets the green component, and updates the value of q, to q*(1+sin(X)). Where sin(X) is close to -1, around X=1.5*pi and X=3.5*pi, the value of q is close to being zeroed out by this code; that explains the vertical red bands.
u/taupelink

q*=1-S(Y): sets the blue component, and updates the value of q, to q*(1-sin(Y)). This is why you see the green bands (no blue) around Y=0.5*pi and Y=2.5*pi; that's where sin(Y) is close to 1.
u/taupelink

x.fillRect(top,left,width,height): standard Javascript for drawing a rectangle. Again I will take one component at a time...
u/taupelink

k*X,k*Y: the X- and Y-coordinates of the upper left-hand corner of the rectangle, scaled by a factor of k.
u/taupelink

k/5**t: the width of the rectangle, which decreases exponentially over time. This can provide texture at different scales, including fine-grained detail.
u/taupelink

i: the height of the rectangle, equal to the index variable. The height of each rectangle is proportional to the red component, indeed to every component; so, for the 120 rectangles that are drawn in any given frame, some are tall and bright, some short and dark.
u/taupelink

A blog post on this dweet is up: https://medium.com/@taupelink/elements-of-a-…

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ArthurThuczsec

remix of d/22683 by u/Xor

function u(t) {

x.fillRect(t*99,0,t/9,9e9)

Sep 6 2021 8:40 PM UTC

}// 26/140

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Tekmap

remix of d/7814 by u/SpecterPainter

function u(t) {

x.fillStyle="#3061"
x.fillRect(0,0,2e3,2e3)
for(i=-9;i<1900;x.fillStyle=`hsl(${i/9%214},99%,60%)`)
x.fillRect(i+=3,540*(1+T(t*i)/3),3,9)

Sep 6 2021 8:10 PM UTC

}// 136/140

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ArthurThuczsec

remix of d/7818 by u/Cistoran

function u(t) {

x.fillStyle="#1061"
for(x.fillRect(i=0,0,I=2e3,I);i<I;x.fillStyle=`hsl(${i/9} 99%60%`)x.fillRect(i+=4,540*S(t+i*(t/2|0))*3,20,30)

Sep 6 2021 7:56 PM UTC

}// 129/140

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ArthurThuczsec

function u(t) {

for(i=99;i--;x.fillStyle=`hsl(${t*i} 90%20%)`)x.fillRect(1e3+C(t)*1e3,500+S(t^i*t)*500,i,1);x.drawImage(c,C(t*13e9)*9,1)

Sep 5 2021 2:41 PM UTC

}// 120/140

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"Smile and wave boys, smile and wave."

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rep_movsd

function u(t) {

eval(unescape(escape`𤀽𣰽🡸𛡦𪑬𫁒𩑣𭀨𣰬𮐽𦐭𤰨𨐽𦀯𦠭𛠵𚐪𦀯𝀬𜰬𥀿𜰺𦀽👚𯁼𦀽👗𛐱🰱𝠺𝀪𚁃𚁆𚡏𚡹𚐾𛠸𙠦𦐥𜐶𙠦𨐾𛠷𙠦𨐼𜠮𝰦𙡙🡚𚰶𞐦𙡙🀹𜀰𚐩𒡙🐨𡠽𩡲𨑭𩐩𙐹𞐪𞀫𚁚🐲𞀰𚐬𥀽𦐼👚𯁼𦐾𚁗🐹𝠰𚐊𩡯𬠨𦀽𦠻𡠼𜐰𜀦𙡘🁗𞱘𚰫𚑐𚁘𚐬𤀨𜐹𜠰𛑘𚐻`.replace(/u../g,'')))

Sep 4 2021 9:16 PM UTC

}// 139/140

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The book of dweet

u/neimad

very nice
u/tomxor

Great idea
u/KilledByAPixel

now that's what i call a good book!

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New_Core

function u(t) {

with(x)for(c.width|=i=20,font="4in '";i--;fillText("Dwitter",-600,99))setTransform(a=S(r=t+i/20),b=C(r),-a,b,960,540),fillStyle="#f90"+i/2

Sep 4 2021 5:04 PM UTC

}// 138/140

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u/danny@hille.dk

love it
u/danny@hille.dk

clever use of shorthand hex color overflow 👍

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tactical_retard

function u(t) {

c.width|=0
x.font="6em'"
x.fillText("🐟",900,500)
for(i=8;i--;)x.drawImage(c,C(t)*50,S(i)*100)
x.drawImage(c,470+C(t)*420,300,960,540)

Sep 4 2021 1:21 AM UTC

}// 133/140

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#fish

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