Helcaraxan/gomod

package depgraph

import (
    "fmt"
    "math"
    "math/bits"
)

func hashToColourHSV(hash string, isTest bool) (text string, background string) {
    var h byte
    for _, b := range []byte(hash) {
        h ^= bits.RotateLeft8(uint8(b), int(b))
    }
    hue := float32(uint8(h)) / float32(math.MaxUint8)
    satVar := float32(uint8(h^0xff)) / float32(math.MaxUint8)

    text = "0.000 0.000 0.000"
    sat := 0.7 + 0.3*satVar
    if isTest {
        sat = 0.2 + 0.2*satVar
    } else if hue < 0.10 || (hue > 0.6 && hue < 0.8) {
        text = "0.000 0.000 1.000"
    }
    return text, fmt.Sprintf("%.3f %.3f 1.000", hue, sat)
}