Dweets awesomed by u/richev

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: #Opposites

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pavel

remix of d/12115 by u/pavel

function u(t) {

for(i=c.width|=h=1065/226;q=--i%3-1,a=q?i:i*h+h/2;x.fillRect(960+S(a+t)*800/r/z,540+(q||T(i))*800/z,s=70/z/z,s))r=S(a%h),z=4+C(a+t)/r,z*=z>1

Apr 16 2019 5:01 PM UTC

}// 140/140

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#d3 #cube #perspective #wireframe

u/pavel

#uncompressed
u/KilledByAPixel

rad

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rodrigo.siqueira

remix of d/13206 by u/pavel

function u(t) {

for(i=c.width|=h=1.6+(t<<1);Y=i--%3-1||S(i);x.fillRect(960+S(a+t)*800/r/z,540+Y*800/z,s=18/z,s))a=i%3?i:i*h,r=T(a%h+h/3),z=3+S(t)+C(a+t)/r

Apr 16 2019 2:27 PM UTC

}// 138/140

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Spin particles #d3

u/f8f82804

#perspective

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robbyg

function u(t) {

c.width|=0
for(y=20;x.fillStyle=['blue','gold','red'][--y%3];)for(i=500;i--;)x.fillRect(z=680+i+y+C(t+y/3)*200,200+y*40+S(i/60+z/9)*18,4,4)

Apr 15 2019 9:24 PM UTC

}// 139/140

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First draft of a #beesandbombs wave https://twitter.com/beesandbombs/status/1113…

u/pavel

You want something like for(c.width|=y=20;x.fillStyle=['blue','gold','red'][--y%3];)for(i=500;i--;)x.fillRect(z=680+i+y+C(y/3-2*t)*200,200+y*40+S(z/9-3*t)*18,4,4)
u/joeytwiddle

Tweaked colours and numbers a little: for(c.width|=y=27;x.fillStyle=['#47a','#ec2','#d66'][--y%3];)for(i=450;i--;)x.fillRect(z=680+i+y+C(y/4-4*t)*200,100+y*33+S(z/12-6*t)*18,6,7)
u/robbyg

You folks are awesome. :)
u/katkip

#romania

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katkip

remix of d/13245 by u/katkip

function u(t) {

c.width+=0;x.translate(960,540);x.globalAlpha=.02;for(r=4;r<1000;r+=5)x.fillRect(-r/2,-390+r/2,10+r,r/4),x.rotate(C(t*4+r/199)/199)

Apr 15 2019 11:56 AM UTC

}// 131/140

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u/Jezza

Nice!

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katkip

function u(t) {

c.width+=0;x.translate(960,540);for(r=4;r<1000;r+=5)x.strokeRect(-r/2,-390+r/2,10+r,r/4),x.rotate(C(t*4+r/199)/199);

Apr 15 2019 11:52 AM UTC

}// 116/140

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#jelly pyramid #d3

u/katkip

not golfed

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jakiki6

function u(t) {

for(a=b=u=c.width|=i=0;i++<99*t;x.fillRect(960+800*C(a+t)*S(b)/z,540+800*C(b)/z,s=20/z/z,s))a+=C(u+=i**.9%1-.5)/69,z=2+S(a+t)*S(b+=S(u)/69)

Apr 14 2019 7:15 AM UTC

}// 139/140

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u/13thptr

looks like copy&paste
u/jellyedwards

https://www.dwitter.net/d/13148

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KilledByAPixel

function u(t) {

for(i=0;i<3e3;)x.fillStyle=R(i%1e3,i%250,i%150,.3+i),j=t*i/9,x.fillRect((S(i)*2e5-j)%2e3-9,(S(i*i)*2e5+j/2)%1080-9,Z=i++?3+9*S(i)**30:1e5,Z)

Apr 13 2019 2:56 AM UTC

}// 140/140

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2D #Starfield I squeezed in more colors and motion blur.

u/13thptr

stylish
u/iverjo

Meteor rain!

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pavel

function u(t) {

for(i=c.width|=h=1.5708;Y=i--%3-1||S(i);x.fillRect(960+S(a+t)*800/r/z,540+Y*800/z,s=60/z/z,s))a=i%3?i:i*h,r=(a%2?S:T)(a%h+h/2),z=3+C(a+t)/r

Apr 12 2019 7:45 AM UTC

}// 139/140

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Butterfly box #d3 #cube #perspective

u/Jezza

Woah!
u/KilledByAPixel

Well done.
u/lionleaf

That's wild! Love it #butterfly

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pavel

function u(t) {

for(c.width=i=1944,w=960;i--;x.fillRect(w+w*S(a)*S(b)/z,540+w*C(b)/z,s=13/z/z,s))j=i%72,z=2+C(a=2.7+S(t)+(j&4?0:j)/72)*S(b=1.5+(i/72|0)/120)

Apr 11 2019 6:03 AM UTC

}// 140/140

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#default on a sphere

u/f8f82804

#d3 #sphere #perspective
u/katkip

how lol
u/pavel

I draw #default one pixel at a time and treat (x,y) of the pixels as angles (a,b) in spherical coordinates. Spherical to 3d cartesian is x=r*sin(a)*sin(b), y=r*cos(a)*sin(b), z=r*cos(b). Projecting 3d to 2d cartesian is x'=x/(2+y/r), y'=z/(2+y/r), and scaling pixel size by 1/(2+y/r)**2 so stuff in the back is smaller.

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pavel

function u(t) {

for(c.width=i=960;--i;x.ellipse(480,270-56*(j%2-.5)*y,r=32*(64-y*y)**.5,r/2,0,a=(j+t%1)/7,a+!j*7))j=i>>4,y=i%16-8;x.stroke()

Apr 10 2019 8:35 AM UTC

}// 124/140

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#wireframe #sphere

u/f8f82804

#d3
u/Xen

Nice!
u/lionleaf

Nice one! #globe
u/pavel

I use 44 longitude lines so the arc angle between adjacent two is 2*pi/44 which is approximated by 1/7 to 4 decimal places.
u/pavel

Using the famous pi ~ 22/7 approximation.

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