Dweets awesomed by u/faudgie

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: #Opposites

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f8f82804

remix of d/11753 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;x.fillRect(X/d+960,Y/d,s=45-5e3*d,s))r=i%2+1,d=Math.hypot(X=r*S(ϕ=i/612)*S(θ=i*37-t/r),Y=r*C(ϕ)/.7+4,r*C(θ)*S(ϕ)+5)/1e3

Jan 14 2019 5:22 PM UTC

}// 140/140

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#perspective #sphere #pointcloud #hypot -- the distortion from this projection is clear here, because the two spheres should be concentric but it looks like they aren't

u/metamero

this dweet series is great
u/f8f82804

thanks! I'm having a lot of fun with it. Hopefully I'll be able to fix up the distortion a little and reivist some of these ideas
u/f8f82804

the distortion here is pretty bad because i'm applying the correction incorrectly! see d/11812

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f8f82804

remix of d/11749 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;x.fillRect(X/d+960,Y/d-960,s=48-2e4*d,s))d=Math.hypot(X=S(ϕ=i/612)*S(θ=i*37+i**C(i+t)/i-t),Y=C(ϕ)/.8+3,C(θ)*S(ϕ)+5)/3e3

Jan 12 2019 12:03 AM UTC

}// 140/140

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#perspective #sphere #pointcloud #swarm #traffic #hypot

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robbyg

function u(t) {

c.width|=0
x.shadowBlur=200
for(i=9;i--;x.fillRect(520+X,440,50,200))X=S(t)*400+i*100,x.shadowColor=x.fillStyle=`hsl(${X/4},70%,55%)`

Jan 11 2019 9:31 PM UTC

}// 133/140

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The rainbow behind #default

u/joeytwiddle

#rainbow

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f8f82804

remix of d/11689 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;x.fillRect(X/d+960,Y/d/.9-1150,s=47-d*2e4,s))a=S(ϕ=i/612),θ=i*37+C(i/99+t),d=Math.hypot(X=S(θ)*a,Y=C(ϕ)+3,C(θ)*a+5)/3e3

Jan 11 2019 8:11 PM UTC

}// 140/140

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#waves on a #perspectives #sphere -- #d3 #pointcloud

u/f8f82804

this dweet uses a better perspective transform based on Math.hypot -- #hypot
u/f8f82804

The projection still isn't perfect, because I'm rotating the sphere's axis towards the viewer by positioning it below the camera. The resulting distortion is approximately corrected by scaling the Y coordinate with /.9.
u/f8f82804

#perspective

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metamero

remix of d/11726 by u/metamero

function u(t) {

eval(unescape(escape`砮晩汬剥捴⡴㽭⬽瀫㵡⼽搽⡡⩡⽫⭢⩢⽫⤪⨱⸵㩱㵰㴲ⱴ㽮⬽焫㵢⽤㩭㵙㵘㵫㴹㘰ⱴ㼸㩮㴴㈬琿㠺測愽堭洬戽夭測派㈦洼㐴♮㹫♮㱫⬴㈿匽琺潮捬楣欽堿攽㹘㴨夽攮礪欪㈯楮湥牗楤瑨⤪攮砯攮示牥獥琩㭴桲潷⁓`.replace(/u(..)/g,"$1%")))

Jan 10 2019 9:55 PM UTC

}// 140/140

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now that is a #gravity #GAME !! click to set atractor : score=t is thrown when mover hits the 42px square : weird reset is click twice on left border aka X=0 (best on fullscren) : #orbit #physics #interactive

u/SockTaters

What a unique concept! I got 0.41666766666666666 after messing around for like 10 minutes

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WasifBoomz

function u(t) {

x.fillStyle=R(Math.random() * 255,Math.random() * 255,Math.random() * 255)
x.fillRect(Math.random() * 1920,Math.random() * 1080,90000000,50)

Jan 9 2019 6:15 PM UTC

}// 140/140

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SchuSlime64

remix of d/11680 by u/NullifiedWarp

function u(t) {

c.width=1920;x.fillStyle=R(255,S(t*8)*64+64,64-C(t*5)*128);for(i=0;i<2000;i++)x.fillRect(T(i+t)*700+900,600+S(t+i*4)*200,8,100*S(t-i*8)-200)

Jan 8 2019 6:00 PM UTC

}// 140/140

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wrapped the screen and added changing colors

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f8f82804

remix of d/11688 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;x.fillRect(960+800*S(θ)*S(ϕ)/Z,540+800*C(ϕ)/Z,s=18*(Z>2?.1:2.1-Z),s))ϕ=i/612,θ=i*37+(i/9)**C(i+t)/99-t/2,Z=C(θ)*S(ϕ)+2

Jan 7 2019 10:32 PM UTC

}// 139/140

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#perspective #sphere #pointcloud #swarm #traffic

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f8f82804

remix of d/11620 by u/f8f82804

function u(t) {

for(i=c.width^=0;i--;Z<1.6&&x.fillRect(960+800*S(θ)*S(ϕ)/Z,540+800*C(ϕ)/Z,s=32*(1.6-Z),s)){ϕ=i/600;θ=i*84+(i/9e3)**C(i+t)**2;Z=C(θ)*S(ϕ)+2;}

Jan 7 2019 6:37 PM UTC

}// 140/140

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patterns on a #perspective #sphere with #occlusion

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JWinslow23

function u(t) {

eval(unescape(escape`景爨昽搽㌰〻搭㴮㔻砮晩汬剥捴⠹㘰⭤⩃⡁⤬㔴〫搪匨䄩Ɽ⼹⬨⠱⵴⨲┱⤪⨸⬨ㄭ琯㠥ㄩ⨪ㄶ⨸⤪⨲Ɽ⼹⤩䄽䵡瑨⹲慮摯洨⤪㘮㌬砮晩汬却祬攽刨昪匨䄫琪㌫匨䄪是搫琩⤬昪匨䄪㔭琪㌩Ɽ⤻`.replace(/u(..)/g,"$1%")))

Jan 7 2019 4:37 PM UTC

}// 131/140

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A cool effect I found somewhere (slightly modified from https://js1k.com/2017-magic/demo/2894 )

u/metamero

nice port hehe
u/lionleaf

Original d/933 by u/p01 I believe :)
u/JWinslow23

Oh, it was? I didn't realize that, thanks for finding that!
u/p01

:)

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