Package gaiasky.util.color

Class ColorUtils

java.lang.Object
gaiasky.util.color.ColorUtils
public class ColorUtils
extends java.lang.Object

  • Field Summary

    Fields
    Modifier and Type Field Description
    static float[] aOrange  
    static com.badlogic.gdx.graphics.Color aOrangeC  
    static float[][] colorArray
    Highlight color array for datasets
    static float[] ddBrown  
    static com.badlogic.gdx.graphics.Color ddBrownC  
    static float[] ddMagenta  
    static com.badlogic.gdx.graphics.Color ddMagentaC  
    static float[] gBlue  
    static com.badlogic.gdx.graphics.Color gBlueC  
    static float[] gGreen  
    static com.badlogic.gdx.graphics.Color gGreenC  
    static float[] gPink  
    static com.badlogic.gdx.graphics.Color gPinkC  
    static float[] gRed  
    static com.badlogic.gdx.graphics.Color gRedC  
    static float[] gWhite  
    static com.badlogic.gdx.graphics.Color gWhiteC  
    static float[] gYellow  
    static com.badlogic.gdx.graphics.Color gYellowC  
    static float[] oDarkGray  
    static com.badlogic.gdx.graphics.Color oDarkGrayC  
    static float[] oLightGray  
    static com.badlogic.gdx.graphics.Color oLightGrayC  
    static float[] tPurple  
    static com.badlogic.gdx.graphics.Color tPurpleC  

  • Constructor Summary

    Constructors
    Constructor Description
    ColorUtils()  

  • Method Summary

    Modifier and Type Method Description
    static float[] brighten​(float[] rgb, float luminosity)
    Returns a copy of the RGB colour brightened up by the given amount
    static float[] BVtoRGB​(double bv)
    Converts the color index B-V to RGB model.
    static void colormap_blue_to_magenta​(float value, float[] rgba)  
    static void colormap_blue_white_red​(float value, float[] rgba)
    Converts a scalar normalized to the range [0:1] into a blue-white-red rgba color, with blue at 0, white at 0.5 and red at 1
    static void colormap_long_rainbow​(float value, float[] rgba)
    Converts a scalar in [0..1] to a long rainbow of rgba values.
    static void colormap_short_rainbow​(float value, float[] rgba)
    Converts a scalar normalized to the range [0:1] into a short rainbow of rgba values.
    static void colormap_yellow_to_red​(float value, float[] rgba)
    Converts a scalar in [0..1] to a yellow to red map.
    static int getBlue​(int rgb)  
    static float[] getColorFromIndex​(int idx)  
    static int getGreen​(int rgb)  
    static int getRed​(int rgb)  
    static float[] getRgbaComplimentary​(float[] rgba)  
    static float[] getRgbComplimentary​(float[] rgb)  
    static void grayscale​(float value, float[] rgba)
    Converts a scalar value that is normalized to [0:1] into a grayscale color vector rgba.
    static float[] hexToRgb​(java.lang.String hex)  
    static float[] hexToRgba​(java.lang.String hex)  
    static float[] hsbToRgb​(float[] hsb)  
    static int HSBtoRGB​(float hue, float saturation, float brightness)  
    static float[] hslToRgb​(float[] hsl)
    Converts an HSL color value to RGB.
    static boolean isZero​(com.badlogic.gdx.graphics.Color c)  
    static float normalize​(float value, float min, float max)  
    static java.lang.String rgbaToHex​(float[] color)  
    static java.lang.String rgbToHex​(float[] color)  
    static float[] rgbToHsb​(float[] color)  
    static float[] rgbToHsl​(float[] rgb)
    Converts an RGB color value to HSL.
    static float[] teffToRGB_harre​(double teff)
    Convert effective temperature to RGB using the Harre and Heller 2021 (Digital Color of Stars) method.
    static float[] teffToRGB_rough​(double teff)
    Converts effective temperature in Kelvin (1000-40000) to RGB

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • gGreen

      public static float[] gGreen

    • gGreenC

      public static com.badlogic.gdx.graphics.Color gGreenC

    • gBlue

      public static float[] gBlue

    • gBlueC

      public static com.badlogic.gdx.graphics.Color gBlueC

    • gRed

      public static float[] gRed

    • gRedC

      public static com.badlogic.gdx.graphics.Color gRedC

    • gYellow

      public static float[] gYellow

    • gYellowC

      public static com.badlogic.gdx.graphics.Color gYellowC

    • gWhite

      public static float[] gWhite

    • gWhiteC

      public static com.badlogic.gdx.graphics.Color gWhiteC

    • gPink

      public static float[] gPink

    • gPinkC

      public static com.badlogic.gdx.graphics.Color gPinkC

    • aOrange

      public static float[] aOrange

    • aOrangeC

      public static com.badlogic.gdx.graphics.Color aOrangeC

    • tPurple

      public static float[] tPurple

    • tPurpleC

      public static com.badlogic.gdx.graphics.Color tPurpleC

    • ddMagenta

      public static float[] ddMagenta

    • ddMagentaC

      public static com.badlogic.gdx.graphics.Color ddMagentaC

    • ddBrown

      public static float[] ddBrown

    • ddBrownC

      public static com.badlogic.gdx.graphics.Color ddBrownC

    • oLightGray

      public static float[] oLightGray

    • oLightGrayC

      public static com.badlogic.gdx.graphics.Color oLightGrayC

    • oDarkGray

      public static float[] oDarkGray

    • oDarkGrayC

      public static com.badlogic.gdx.graphics.Color oDarkGrayC

    • colorArray

      public static float[][] colorArray
      Highlight color array for datasets

  • Constructor Details

    • ColorUtils

      public ColorUtils()

  • Method Details

    • getColorFromIndex

      public static float[] getColorFromIndex​(int idx)

    • getRgbaComplimentary

      public static float[] getRgbaComplimentary​(float[] rgba)

    • getRgbComplimentary

      public static float[] getRgbComplimentary​(float[] rgb)

    • rgbToHsb

      public static float[] rgbToHsb​(float[] color)

    • hsbToRgb

      public static float[] hsbToRgb​(float[] hsb)

    • rgbaToHex

      public static java.lang.String rgbaToHex​(float[] color)

    • rgbToHex

      public static java.lang.String rgbToHex​(float[] color)

    • hexToRgba

      public static float[] hexToRgba​(java.lang.String hex)

    • hexToRgb

      public static float[] hexToRgb​(java.lang.String hex)

    • normalize

      public static float normalize​(float value, float min, float max)

    • grayscale

      public static void grayscale​(float value, float[] rgba)
      Converts a scalar value that is normalized to [0:1] into a grayscale color vector rgba. See: http://www.particleincell.com/blog/2014/colormap/
      Parameters:
      value -

    • colormap_blue_white_red

      public static void colormap_blue_white_red​(float value, float[] rgba)
      Converts a scalar normalized to the range [0:1] into a blue-white-red rgba color, with blue at 0, white at 0.5 and red at 1
      Parameters:
      value - The value
      rgba - The color

    • colormap_short_rainbow

      public static void colormap_short_rainbow​(float value, float[] rgba)
      Converts a scalar normalized to the range [0:1] into a short rainbow of rgba values. See: http://www.particleincell.com/blog/2014/colormap/
      Parameters:
      value -

    • colormap_long_rainbow

      public static void colormap_long_rainbow​(float value, float[] rgba)
      Converts a scalar in [0..1] to a long rainbow of rgba values. See here
      Parameters:
      value - The value in [0..1]

    • colormap_yellow_to_red

      public static void colormap_yellow_to_red​(float value, float[] rgba)
      Converts a scalar in [0..1] to a yellow to red map. See here
      Parameters:
      value - The value to convert

    • colormap_blue_to_magenta

      public static void colormap_blue_to_magenta​(float value, float[] rgba)

    • teffToRGB_harre

      public static float[] teffToRGB_harre​(double teff)
      Convert effective temperature to RGB using the Harre and Heller 2021 (Digital Color of Stars) method.
      Parameters:
      teff - The effective temperature of the star
      Returns:
      The RGB color in a float array
      See Also:
      Paper at ADS

    • teffToRGB_rough

      public static float[] teffToRGB_rough​(double teff)
      Converts effective temperature in Kelvin (1000-40000) to RGB
      Parameters:
      teff - Effective temperature
      Returns:
      The RGB color in a float array
      See Also:
      Temperature to RGB, Color temperature conversion

    • BVtoRGB

      public static float[] BVtoRGB​(double bv)
      Converts the color index B-V to RGB model. See here
      Parameters:
      bv - The B-V color index
      Returns:
      The RGB as a float array in [0..1]

    • brighten

      public static float[] brighten​(float[] rgb, float luminosity)
      Returns a copy of the RGB colour brightened up by the given amount
      Parameters:
      rgb - The RGB color
      luminosity - The new luminosity amount in [0..1]
      Returns:
      The new RGB array

    • rgbToHsl

      public static float[] rgbToHsl​(float[] rgb)
      Converts an RGB color value to HSL. Conversion formula adapted from http://en.wikipedia.org/wiki/HSL_color_space. Assumes r, g, and b are contained in the set [0..255] and returns h, s, and l in the set [0..1]
      Parameters:
      rgb - Float array with the RGB values
      Returns:
      Array The HSL representation

    • hslToRgb

      public static float[] hslToRgb​(float[] hsl)
      Converts an HSL color value to RGB. Conversion formula adapted from http://en.wikipedia.org/wiki/HSL_color_space. Assumes h, s, and l are contained in the set [0..1] and returns r, g, and b in the set [0..255].
      Parameters:
      hsl - Float array with the HSL values
      Returns:
      Array The RGB representation

    • HSBtoRGB

      public static int HSBtoRGB​(float hue, float saturation, float brightness)

    • getRed

      public static int getRed​(int rgb)

    • getGreen

      public static int getGreen​(int rgb)

    • getBlue

      public static int getBlue​(int rgb)

    • isZero

      public static boolean isZero​(com.badlogic.gdx.graphics.Color c)