@@ -192,7 +192,7 @@ module Colorist # Returns an array of the hue, saturation and value of the color. # Hue will range from 0-359, hue and saturation will be between 0 and 1. - + def to_hsv red, green, blue = *[r, g, b].collect {|x| x / 255.0} max = [red, green, blue].max @@ -249,6 +249,28 @@ module Colorist def invert Color.from_rgb(255 - r, 255 - g, 255 - b) end + + # Uses a naive formula to generate a gradient between this color and the given color. + # Returns the array of colors that make the gradient, including this color and the + # target color. By default will return 10 colors, but this can be changed by supplying + # an optional steps parameter. + def gradient_to(color, steps = 10) + color_to = Colorist::Color.from(color) + red = color_to.r - r + green = color_to.g - g + blue = color_to.b - b + + result = (1..(steps - 3)).to_a.collect do |step| + percentage = step.to_f / (steps - 1) + Color.from_rgb(r + (red * percentage), g + (green * percentage), b + (blue * percentage)) + end + + # Add first and last colors to result, avoiding uneccessary calculation and rounding errors + + result.unshift(self.dup) + result.push(color.dup) + result + end # Converts the current color to grayscale using the brightness # formula provided. See #brightness for a description of the lib/colorist/color.rb 09662bc95a038cfab6c7a13b534774121d5183ab Tom Ward tom@popdog.net http://github.com/mbleigh/colorist/commit/f991bbb41bff8d9726e3f3c3c2bd600cb1917312 f991bbb41bff8d9726e3f3c3c2bd600cb1917312 2008-11-18T03:20:09-08:00 2008-11-18T03:20:09-08:00 Added gradient_to method, that generates a gradient between the current color and a given color 89629a6c645d77ae71288e6711a19b20b8f76d1b Tom Ward tom@popdog.net