Dweets by u/mxfh

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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mxfh

remix of d/23558 by u/mxfh

function u(t) {

I=new ImageData(w=2048,w)
b=new Int32Array(I.data.buffer)
for(i=4e6;i--;X=i%w-960,b[i]=X*X+Y*Y+S(t)/Y*i<<14)Y=i/w-540
x.putImageData(I,0,0)

Aug 17 2021 3:33 PM UTC

}// 139/140

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Event Horizon Camera

u/mxfh

#time

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mxfh

remix of d/23558 by u/mxfh

function u(t) {

I=new ImageData(w=2048,w)
b=new Float32Array(I.data.buffer)
for(i=3e6;i--;X=i%w-960,b[i]=X*X+Y*Y*(t+w/Y)|-Y)Y=i/w-700
x.putImageData(I,0,0)

Aug 17 2021 12:34 PM UTC

}// 139/140

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Sunset over Float sea

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mxfh

remix of d/23551 by u/mxfh

function u(t) {

I=new ImageData(w=2048,w)
b=new Int32Array(I.data.buffer)
for(i=3e6;i--;b[i]=(i-Y&Y+i)*-t/i%i<<22)Y=i*w
x.putImageData(I,0,0)

Aug 15 2021 2:06 AM UTC

}// 125/140

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https://www.dwitter.net/d/23557 so with some space for setting up other buffer view, it speeds things up when treating rgba Uint8Clamped Array as single 32bit value

u/mxfh

wondering if we could store that buffer somwhere to do truly iterative fractal stuff
u/taupelink

trippy!

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mxfh

remix of d/23417 by u/mxfh

function u(t) {

for(d=new ImageData(w=2048,w),m=3e6;m--;d.data[m*4-1]=(m-Y&Y+m)*t/w&w)Y=m*w
x.putImageData(d,0,0)

Aug 13 2021 11:51 AM UTC

}// 97/140

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u/mxfh

for(d=new ImageData(w=2048,w),m=1e7;m--;d.data[m|3]=(m-Y&Y+m)*t/w&w)Y=m*w x.putImageData(d,0,0)
u/mxfh

for(d=new ImageData(w=2048,w),m=1e7;m--;d.data[m|3]=(m-Y&Y+m)*t/w&w)Y=m*w x.putImageData(d,0,0)
u/mxfh

-2 but considerably slower

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mxfh

remix of d/23536 by u/mxfh

function u(t) {

r=70;c.width|=w=440;for(λ=φ=a=w/r;λ+=a,φ>-a;φ-=.1)x.arc(C(φ)*S(d=λ-t)*r+w,(S(φ+a/4)*C(φ)*C(d))*r+w,φ**4,0,a)
x.fill("evenodd")

Aug 11 2021 7:42 PM UTC

}// 126/140

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44/7 vs 710/113

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mxfh

remix of d/855 by u/mxfh

function u(t) {

r=113;c.width|=w=710;for(λ=φ=a=w/r;λ+=a,φ>-a;φ-=.1)x.arc(C(φ)*S(d=λ-t)*r+w,(S(φ+a/4)*C(φ)*C(d))*r+w,φ**4,0,a)
x.fill("evenodd")

Aug 11 2021 12:33 AM UTC

}// 127/140

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mxfh

remix of d/23489 by u/mxfh

function u(t) {

for(d=new ImageData(c.width=w=710,h=452),m=w*h;A=m/2%w/h,B=m/6*w+t,m--;)
d.data.set([C=(S(A*B+t*5)+S(t))*h,,-C,h],m*4)
x.putImageData(d,0,0)

Aug 6 2021 7:22 PM UTC

}// 140/140

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weird what that single factor can do.

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mxfh

remix of d/23485 by u/mxfh

function u(t) {

for(d=new ImageData(c.width=w=710,h=452),m=w*h;A=m/2%w/h,B=m/2*w+t,m--;)
d.data.set([C=(S(A*B+t*5)+S(t))*h,,-C,h],m*4)
x.putImageData(d,0,0)

Aug 6 2021 7:20 PM UTC

}// 140/140

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mxfh

function u(t) {

for(c.width=w=355,d=new ImageData(w,h=226),p=w/h,s=p/w*2,m=w*h;m--;)
d.data.set([A=S(h/w*m+t)*h,-A,-A,h+=s],m*4)
x.putImageData(d,0,0)

Aug 6 2021 4:23 PM UTC

}// 134/140

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mxfh

remix of d/23417 by u/mxfh

function u(t) {

for(d=new ImageData(I=i=w=c.width=511,w);i--;)for(j=w*2;j--;)d.data[I++]=(i-j&i+j)*t&w
x.putImageData(d,0,0)

Jul 29 2021 10:34 AM UTC

}// 108/140

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