Created
December 23, 2019 14:39
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| // stores whether we're interpolating colors | |
| // from palette 0 -> 1 (1) or 1 -> 0 (-1) | |
| let prevDirection = 1; | |
| const updatePalette = t => { | |
| const timeScale = 0.0005; | |
| const x = t * timeScale; | |
| // normalized value 0..1 used to interpolate palette colors | |
| const inter = (Math.cos(x) + 1) / 2; | |
| // did we switch direction, and should ergo pick a new palette | |
| // random palette to interpolate towards? | |
| const direction = -Math.sin(x) >= 0 ? 1 : -1; | |
| if (prevDirection != direction) { | |
| prevDirection = direction; | |
| if (direction == -1) { | |
| palettes[0] = makeRandomPalette(); | |
| } else { | |
| palettes[1] = makeRandomPalette(); | |
| } | |
| } | |
| // create interpolated palette for current frame | |
| for (let i = 0; i < 256; i++) { | |
| palette[i] = interpolate(palettes[0][i], palettes[1][i], inter); | |
| } | |
| }; |
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