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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. ```

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• Sailing in rough sea (for those who do not suffer from seasickness) #sea #water
• u/cantelope
awesome progression and artistic purposing of this function :)
• u/joeytwiddle
What's going on here? How can you use bitwise not (`~`) on a floating point number?
• u/joeytwiddle
Oh, it looks like `~` makes the number negative, and then rounds it down
• u/joeytwiddle
So with `n+~n+.5` you get a sawtooth in the range -.5 to +.5, based on the fractional part of `n`

``` 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) ```