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function u(t) {
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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.
Theme challenge of the month: #castle
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  • Wait a while for it to fill in, or view in fullscreen

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remix of d/2522 by u/magna

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  • Hacker typer

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  • Totally different dragon curve implementation with 13 fewer bytes and it correctly draws the first segment
  • u/eruonna
    okay, not sure if it is worth kicking out yet another version to get the positioning right
  • u/eruonna
    okay, not sure if it is worth kicking out yet another version to get the positioning right
  • u/donbright
    color - - a=[0,-9,0,9,0] if(!t){n=0;d=0;b=380;c=830} d+=((n&-n)<<1)&n++?1:3;d%=4 b+=a[d];c-=a[d+1] x.fillStyle=R(128+n%256,64+n%128) x.fillRect(b,c,9,9)

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remix of d/2511 by u/eruonna

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  • denser version

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remix of d/2509 by u/eruonna

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  • adjusted position to get more on the screen

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  • Works best in full screen, otherwise line is too thin
  • u/donbright
    how does it work ?
  • u/eruonna
    One way to draw the next iteration of the dragon curve is to take the previous iteration and then add it to itself backwards and rotated 90 degrees. Here p is the array of previous steps, j the index of the current step, and i walks backward through p. When i gets to the beginning, we set it equal to j and start over.
  • u/donbright
    thanks, that is fascinating

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  • A clock! I couldn't golf it enough to get varying line widths for the hands

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