## dwitter.net

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`function u(t) {`
```} // 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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remix of d/21547 by u/tomxor

`function u(t) {`

```}// 102/140 ```

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• u/tomxor
Each block is 4 pixels wide. Remove 2 of the three parts inside `!( )` to see how each contributes to the shape. Make sure to leave an `| 0` to the right in order to floor the result. Black represents 0, white represents 1 or more. The idea is to lay down three different layers, the non zero numbers all merge together throught OR, the black area that remains is the 0 from each layer.
• u/tomxor
`X/34-65/35 | 0` scales X so that -1 and +1 lie on the left and right edges with 0 in between. The width = 34=17*4px/2 (17 blocks and gaps, divided by two because it's from -1 to +1). 65=128/2+1, the center of the canvas+1 due to -0 bias divided by 35 to match the scale of X. `Y/8-37/9 | 0` does the same for the top and bottom edges. `X+2&4` creates a repeating pattern 0,4,0,4 every 4 pixels, +2 shifts it by half a block to line up with the left and right edges due to the odd number blocks required for the default.
• u/Qwitter
thanks for this

``` 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) ```