Top dweets by u/andrea270872

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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andrea270872

function u(t) {

u.x=u.x+u.v||80
u.v=u.v||9
u.v*=(4<u.x&u.x<980)?1:-1
c.width=1e3
a=250+S(t)*250
b='fillRect'
x[b](2,a,9,50)
x[b](985,a,9,50)
x[b](u.x,a,9,9)

Mar 6 2019 8:54 AM UTC

}// 140/140

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PerfectPong for 2 (high res)

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andrea270872

function u(t) {

x.canvas.onmousemove=e=>{p=e.clientX*3}
c.width=1920
b='fillRect'
x[b]((~~(t/2)*97)%11*100+50,t%2*500,10,30)
x[b](p,990,90,30)

Mar 5 2019 7:21 PM UTC

}// 126/140

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Catch a Falling Star - a fake game (...move the mouse...)

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andrea270872

remix of d/21546 by u/andrea270872

function u(t) {

c.width|=t?(t%4<.01?u.a=[1,...u.a.map((n,i)=>n+u.a[i+1]||1)]:0):u.a=[]
u.a.map((n,i)=>{for(j=0;n;n>>=1)x.fillRect(i*99,j++*99,90,(n&1)*90)})

Feb 1 2021 5:54 PM UTC

}// 140/140

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Wait for it...

u/andrea270872

For some reasons I cannot do it with a single map operation... anybody can see why?

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andrea270872

remix of d/12954 by u/andrea270872

function u(t) {

c.width+=C(t)*2
for(j=1;j++<9;x.fillStyle='#03'+j)for(i=18;--i;){F=(S(i/9)*C(i/9+j+t/2))**.1;x.fillRect((i+j/8)*98,50*j-F*10,99,50*j+F*20)}

Apr 1 2019 7:16 PM UTC

}// 139/140

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A bit better maze

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andrea270872

remix of d/12953 by u/andrea270872

function u(t) {

c.width+=C(t)*2
for(j=1;j++<9;x.fillStyle='#02'+j)for(i=18;i--;){F=(S(i/2)*C(i/4+j+t))**.1;x.fillRect((i+j/8)*98,50*j-F*10,99,80*j+F*20)}

Apr 1 2019 6:57 PM UTC

}// 137/140

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Running in the maze (with more balanced "zoom")

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andrea270872

function u(t) {

r=Math.random
if(frame%19==1)K=[B=r()*2-1,A=S(t),-A,B,1e3,500,x.resetTransform()]
x.transform(...K)
x.strokeRect(0,0,40,40)

Mar 26 2019 6:07 PM UTC

}// 123/140

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random affine transforms

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andrea270872

function u(t) {

c.width|=K=1e3
A=[(t*97%11-5)*K,(t*89%13-6)*K,0]
P=t?P.map(([i,j,z,v])=>[i,j,(z+1)%99,x.fillRect(K+i/z,500+j/z,8,8)]):[A]
P[K]||P.push(A)

Mar 15 2019 7:43 PM UTC

}// 137/140

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Remove the drain stopper v2

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andrea270872

function u(t) {

c.width|=r=Math.random
x.canvas.onclick=e=>{P=[500,500,r()*5-2,-r()*10]}
[I,J,U,V]=P
P=t?[(I+U)%2e3,J+V,U,V+.1]:0
x.fillRect(I,J,8,8)

Mar 15 2019 5:58 PM UTC

}// 133/140

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Shoot a particle (click anywhere on the canvas)

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andrea270872

remix of d/12711 by u/andrea270872

function u(t) {

for(c.width|=j=99;j-=9;){
x.beginPath()
x.moveTo(2e3,Y=t*500%2e3-j*11)
for(i=21;i--;x.lineTo(i*99,Math.random()*(80-j)+Y))x.stroke()}

Mar 9 2019 5:45 PM UTC

}// 133/140

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beach

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andrea270872

function u(t) {

for(c.width|=j=99;j-=9;x.lineWidth=j/9){
x.beginPath()
x.moveTo(2e3,Y=t*500%2e3-j*11)
for(i=21;i--;x.lineTo(i*99,S(t*5+i)*40+Y))x.stroke()}

Mar 9 2019 5:38 PM UTC

}// 139/140

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Returning waves

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