color

Documentation

Index

• Variables
• func GradientColorList(gradient GradientTable, length int) []colorful.Color
• func GradientPNG(gradient GradientTable, h int, w int)
• func HexToColor(s string) colorful.Color
• func ToUint32(color colorful.Color) uint32
• type GradientTable
  • func (gt GradientTable) GetInterpolatedColor(t float64) colorful.Color

Variables

var ColorMap = map[string]string{
	"blue":   "#0000ff",
	"green":  "#00ff00",
	"yellow": "#ffaf33",
	"purple": "#af33ff",
	"red":    "#ff0000",
	"teal":   "#33ffd1",
	"pink":   "#ff08c7",
	"white":  "#ffffff",
	"black":  "#000000",
}

ColorMap is a map of named colors to hex values

Functions

func GradientColorList

func GradientColorList(gradient GradientTable, length int) []colorful.Color

GradientColorList generates a list of colors for a GradientTable length: the number of colors you want

func GradientPNG

func GradientPNG(gradient GradientTable, h int, w int)

GradientPNG generates a gradient PNG as an example

func HexToColor

func HexToColor(s string) colorful.Color

HexToColor converts a hex string to a Color

func ToUint32

func ToUint32(color colorful.Color) uint32

ToUint32 converts a color object to a uint32 for use by the neopixel

Types

type GradientTable

type GradientTable []struct {
	Col colorful.Color
	Pos float64
}

GradientTable contains the "keypoints" of the colorgradient you want to generate. The position of each keypoint has to live in the range [0,1]

func (GradientTable) GetInterpolatedColor

func (gt GradientTable) GetInterpolatedColor(t float64) colorful.Color

GetInterpolatedColor is the meat of the gradient computation. It returns an HCL-blend between the two colors around `t`. Note: It relies heavily on the fact that the gradient keypoints are sorted.