Source file src/github.com/lucasb-eyer/go-colorful/happy_palettegen.go

Documentation: github.com/lucasb-eyer/go-colorful

     1  package colorful
     2  
     3  import (
     4  	"math/rand"
     5  )
     6  
     7  // Uses the HSV color space to generate colors with similar S,V but distributed
     8  // evenly along their Hue. This is fast but not always pretty.
     9  // If you've got time to spare, use Lab (the non-fast below).
    10  func FastHappyPalette(colorsCount int) (colors []Color) {
    11  	colors = make([]Color, colorsCount)
    12  
    13  	for i := 0; i < colorsCount; i++ {
    14  		colors[i] = Hsv(float64(i)*(360.0/float64(colorsCount)), 0.8+rand.Float64()*0.2, 0.65+rand.Float64()*0.2)
    15  	}
    16  	return
    17  }
    18  
    19  func HappyPalette(colorsCount int) ([]Color, error) {
    20  	pimpy := func(l, a, b float64) bool {
    21  		_, c, _ := LabToHcl(l, a, b)
    22  		return 0.3 <= c && 0.4 <= l && l <= 0.8
    23  	}
    24  	return SoftPaletteEx(colorsCount, SoftPaletteSettings{pimpy, 50, true})
    25  }
    26  

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