Dweets awesomed by u/vvarr

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

Please log in (or register) to post a dweet (copy-paste the code somewhere safe to save it meanwhile)


    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

show FPS hide FPS share 1 remix fullscreen

p01

function u(t) {

for(X=c.width=240;X--;x.fillRect(X,D*4,2/D,129-D*8))for(D=0;'.'<(u+1)[(t*4+D*C(T=X/240-.5+C(t)/3)&7)|(3.5+D*S(T))<<3]&&D<16;)D+=.1

Jul 28 2017 10:41 PM UTC

}// 130/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

ITSY-DWITTY-WOLFENSTEINY

u/sigveseb

Ace!
u/p01

THANKS. I optimized this down to 128 bytes and fixed the bug of the thin walls in the background - https://www.dwitter.net/d/2963
u/iverjo

#wolfenstein

show FPS hide FPS share 2 remixes fullscreen

cantelope

remix of d/2309 by u/cantelope

function u(t) {

x.fillRect(0,0,i=2e3,2e3);for(g=i/2;i--;x.clearRect(960+l*S(t)*g/Z,540+C(p)*i/Z*g,s=2e8/Z/Z,s))l=S(p=i*2.1+t*(i<1e3?-1:1))*i,Z=g*4.5-l*C(t)

Jul 27 2017 6:43 AM UTC

}// 139/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/sigveseb

kewl
u/iverjo

stylish

show FPS hide FPS share 1 remix fullscreen

cantelope

remix of d/2845 by u/cantelope

function u(t) {

A=960,B=540,x.fillRect(0,0,D=2e3,D)
for(i=D;i--;)x.clearRect(A+1/(Z=2.5+C(p=i*C(t/2)/40)*S(q=i/628))*(X=S(p)*S(q))*A,B+C(q)/Z*A,s=69/Z/Z,s)

Jul 10 2017 4:43 AM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Show more comments…
u/lionleaf

That's really neat!
u/Polyducks

This is amazing! What's the concept behind it? How are you getting the sphere?
u/cantelope

@Polyducks, it's a golfed version of the equation of a sphere [x=sin(p1)*sin(p2);z=cos(p2);z=cos(p1)*sin(p2);] combined with a tiny 3D projector, X=cx+1/z*x*cx; Y=cy+y/z*cx, where cx/cy is center screen, and x/y/z are the 3D coordinates. Hope that makes sense! :)
u/cantelope

*equation of a sphere: [x=sin(p1)*sin(p2);y=cos(p2);z=cos(p1)*sin(p2);]
u/alien

thanks for that, is projector a mathematical construct? does it have other names?
u/cantelope

@alien it's my own invention, the product of years of research into geometry. I wrote a tutorial with a (very ungolfed) version here https://cantelope.org/3D
u/alien

*__*
u/alien

All the lienar algebra and vectorial calculus in my bachelor finnally comes to life in my head... this is soooo cool @cantelope...
u/donbright

bravo... bravo

show FPS hide FPS share 1 remix fullscreen

hscells

function u(t) {

x.fillStyle=`hsl(${9*t},99%,70%)`
x.rotate(t/9*Math.PI)
x.fillRect(0,0,9,2e3)
x.setTransform(1,0,0,1,S(t)*2e2,C(t)*2e2)
x.translate(990,480)

May 16 2017 1:43 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/joeytwiddle

Reminds me of a certain browser

show FPS hide FPS share fullscreen

New_Core

function u(t) {

c.width|=0;for(i=40;i--;)a=i*50,x.translate(d=960,e=540),x.rotate(S(t)/50),x.lineWidth=10,x.translate(-d,-e/1.05),x.strokeRect(d-a/2,-e,a,a)

May 7 2017 1:25 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/MrM@_S

move the a=i*50 into the for loop to save a byte
u/dwitter

not sure if it's a twisting pyramid or a moving hole
u/includeRubiks

so cool!!!!!!!!!

show FPS hide FPS share fullscreen

MrM@_S

remix of d/2573 by u/MrM@_S

function u(t) {

c.width=200;t||(z=X=2,s=-1);onkeyup=a=>z*=a.keyCode&15||1;x.fillText(X+"="+z+"? Score:"+s,2,9);z==X&&(X*=s++%4*~~t%4+1,z=1);z>X&&(frame=0)

May 5 2017 12:51 PM UTC

}// 138/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

[The Math Game] Get the left side of the equation equal right side using the numbers 1-9. It is easier if you know how to multiply.

u/sigveseb

Cool game! Only problem is when the goal number's prime decomposition contains a prime number with more than one digit (e.g. 11 and up). Then it is impossible to enter the correct answer!
u/MrM@_S

"3+3+1=7" so X*=s++%4*~~t%4+1 would never have a prime composition of 11 etc. I am pretty sure that my algorithm prevents such causes.....
u/MrM@_S

wait it is "(0-3)*(0 to 3)+1"
u/MrM@_S

(0 to 3)
u/MrM@_S

that leaves a 1 through 10 possibility

show FPS hide FPS share 1 remix fullscreen

keithclark

function u(t) {

for(a=c.width|=0,G=36,J=S(t)/4;a--;'p}¶¼<¼¶}p'.charCodeAt(Y*C(t)+G-X*J&15)>>(X*C(t)+Y*J+t*G)%15&1&&x.fillRect(X*G,Y*G,G,G))X=a%53,Y=a>>6

May 3 2017 1:26 PM UTC

}// 138/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

fullscreen rotozoom

u/joeytwiddle

#spaceinvaders #rotozoom #alien
u/yonatan

3-char shorter transposed bitmap (just posting so I won't forget it): 'ĄǼͶ߿׽ԅØ'

show FPS hide FPS share 4 remixes fullscreen

yonatan

remix of d/2641 by u/yonatan

function u(t) {

for(X=c.width=256;X-=2;)for(Y=148;Y-=2;x.fillStyle=`hsl(${A=(X*C(t)-Y**S(t))&(Y*C(t)+X**S(t))},${A=A*t%50+25}%,${A}%`)x.fillRect(X,Y,2,2)

Apr 28 2017 10:44 PM UTC

}// 137/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/donbright

game changer
u/joeytwiddle

Wow! :D
u/yonatan

hmm, 15 FPS here and 30 on https://dweet.dwitter.net/id/2643?autoplay=1

show FPS hide FPS share fullscreen

keithclark

function u(t) {

for($=c.width|=0;$--;x.fillRect(b+960,F+520,h/=3,h))e=$/7-C(t/4),d=($>>6)+t*6%1,h=d**(d/20),b=S(e)*d*h+S(t/3)/h*4e3,F=C(e)*d*h+C(t/5)/h*1e3

Apr 26 2017 2:35 PM UTC

}// 139/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/magna

Wheeeeee!!!
u/iverjo

#tunnel
u/vain

nice dot tunnel.

show FPS hide FPS share 1 remix fullscreen

vvarr

function u(t) {

i=q=c.width=2e3
for(;i--;x.fillRect(o*C(a)*z+q/2,(r*S(b)+190)*z,z*=z/2,z))z=q/((o=2e2+(r=25+9*C(6*S(a=i/310-t)))*C(b=i%50/8))*S(a+=2*t)+710)

Apr 26 2017 12:06 AM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/donbright

wwooooahhh!!!
u/rileyjshaw

for(i=q=c.width|=0;i--;... can save a few bytes :)
u/Kalanchoe

oh wow! this is mind-blowing
u/sigveseb

Very cool stuff
u/vvarr

Thanks a lot guys, my first dweet! ^^

dwitter.net | vvarr (2006)