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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: #time
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remix of d/23756 by u/tomxor

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remix of d/23746 by u/rep_movsd

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  • u/rep_movsd
    As the moon, so the sun, fortune is as a ripening plum - I Ching

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remix of d/23746 by u/rep_movsd

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remix of d/23746 by u/rep_movsd

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  • Smolr #book of dweet

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remix of d/23549 by u/tomxor

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  • u/danny@hille.dk
    I distinctly remember the grid to be blue... but all the youtube videos shows it to be purple... I think it's a conspiracy :-)
  • u/ullo
    i like
  • u/KilledByAPixel
    dweetabase updated! https://dweetabase.3d2k.com/
  • u/tomxor
    I can't find it now but I seem to remember reading about how emulated colours of amigas look different from real amiga video output. The emulators are probably just spitting out the RGB values and letting the host OS do the gamma etc. I suspect real amiga video output must have been a bit "coloured" which causes this difference.

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remix of d/23544 by u/pavel

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  • u/pavel
    -2 char using S(t%3.14) to bounce and inlining the single Math.abs call
  • u/danny@hille.dk
    What a clever trick, using modulus pi of t, to only get the positive part of the sinus curve
  • u/danny@hille.dk
    3.2 works fine, while 3 and 3.1 looks wrong
  • u/danny@hille.dk
    test code: c.width|=0,x.fillRect(o=860,o-S(t*4%3.2)*o,200,200)

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remix of d/23413 by u/tomxor

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  • "This Thing" Capturing a Marble #Physics

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  • u/tomxor
    Inspired by d/23398. Uses raster/2d-voxel based intersection
  • u/Xen
    love it!
  • u/magna
    HOW?!
  • u/katkip
    how
  • u/tomxor
    It's particle physics, but the collisions are with implicit volumes. So rather than checking against a specific object, each pixel is intersected with the circle, if the pixel is filled and intersects, then it contributes velocity to the particle along the collision normal (the vector between the pixel and the point), the deeper the intersection based on the radius the greater the contribution... this is not correct at all and creates lots of phantom momentum, but is very simple and shares the code with drawining the screen.

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remix of d/23235 by u/katkip

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remix of d/22986 by u/tomxor

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  • Indecisive Paint

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