Cover of "Computers And Automation And… by rodrigo.siqueira

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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rodrigo.siqueira

function u(t) {

K=3.5
if(!t){for(b=-K;b<=K;b++)for(C=-K;C<=K;C++)for(a=-K;a<0;a++)for(X=680;X--;x.fillRect(X*1.7+380,540+Y,2,2))Y=(C*120+a*(X-340))/b*1.5}

Apr 19 2021 4:20 PM UTC

}// 138/140

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Cover of "Computers And Automation And People" magazine, January, 1973. I was able to recreate the image based on a small description (in page 5): "Front Cover Picture: The front cover drawing, called "Phropase", was produced by an Algol 60 program, drawing straight lines ax + by + c = 0, where a, b and c were "stepped arithmetically in nested loops". The computer used was an ICL 1904A, driving a Calcomp 1934/6 plotter. The programmer artist is Nihan Lloyd-Thurston.

u/rodrigo.siqueira

Here is the full journal with it's cover artwork and description: https://archive.org/details/bitsavers_comput… "Computers And Automation And People", Jan., 1973
u/smtsjhr

thats so cool and well done! I find this kind of exercise to be very inspiring : )


      u(t) is called 60 times per second.
      t: elapsed time in seconds.
      c: A 1920x1080 canvas.
      x: A 2D context for that canvas.
      S: Math.sin
      C: Math.cos
      T: Math.tan
      R: Generates rgba-strings, ex.: R(255, 255, 255, 0.5)

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