Dweets awesomed by u/Jezza

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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Jezza

remix of d/13194 by u/username

function u(t) {

x.font=code.length/9+`em'`

x.fillText('Jezzzzzzzaa:)',99,999)

if([...code].reduce((a,c)=>a+c.charCodeAt(0),0)!=9999)code+='{'

Apr 13 2019 10:18 AM UTC

}// 127/140

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Following the rules this time :)

u/username

:)
u/username

I should make it harder :)

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Jezza

remix of d/13194 by u/username

function u(t) {

x.font=code.length/9+`em'`

x.fillText('jezza',99,999)

if([...code].reduce((a,c)=>a+c.charCodeAt(0),0)!=9209)code+='{'

Apr 13 2019 10:08 AM UTC

}// 119/140

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Solving @username's puzzle!

u/Jezza

See: https://www.dwitter.net/d/13194

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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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Jezza

function u(t) {

with(Math){M=960;N=540;r=random;for(i=M;i--;)A=r()*PI*2,B=acos(r()),X=C(A)*S(B),Y=S(A)*S(B),D=.2,x.fillRect(X*N+M,Y*N+N,D,D)}

Apr 12 2019 5:12 AM UTC

}// 125/140

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Simple shaded sphere

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Jezza

remix of d/13200 by u/Jezza

function u(t) {

c.width|=0;for(a=t%1-1;a<9;a++)for(d=0,b=2**a;d<7;d+=1.57)x.beginPath(),x.arc(960+b*S(d)*3,540+b*C(d)*3,b,0,7),x.stroke()

Apr 12 2019 1:16 AM UTC

}// 121/140

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Golfing

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Jezza

function u(t) {

c.width|=0;for(a=t%1-1;a<9;a++)b=2**a,[0,3,0,-3,0].map((h,i,j)=>{x.beginPath(),x.arc(960+b*h,540+b*j[i+1],b,0,7),x.stroke()})

Apr 12 2019 1:09 AM UTC

}// 125/140

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Simple infinite zoom

u/KilledByAPixel

i like infinite zooms

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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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Jezza

function u(t) {

c.width|=0;for(i=0;i<9;i++)x.fillRect(400+i*100+S(t)*300,400,50,200);x.globalAlpha=0.3;for(X=12;X--;)x.drawImage(c,T(X+t)*200,T(X-t)*200);

Apr 10 2019 7:55 AM UTC

}// 138/140

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#default

u/magna

Awesome! I'm a fan of defaults!

dwitter.net | Jezza (9978)