Class: Wx::Colour

Inherits:
Object
  • Object
show all
Defined in:
lib/weft/wxgui/utilities.rb

Overview

extension to Wx::Colour

Instance Method Summary collapse

Instance Method Details

#mix(other, self_parts = 1, other_parts = 1) ⇒ Object

Create a new colour by mixing self_parts of self with other_parts of other. The new colour is produced by applying the following averaging formula to the red, green and blue components of each colour

( colour_1 * conc_1 ) + ( colour_2 * conc_2 )
      --------------------------
           conc_1 + conc_2



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# File 'lib/weft/wxgui/utilities.rb', line 115

def mix(other, self_parts = 1, other_parts = 1)
  return self if self_parts.zero? && other_parts.zero?
  rgb = [ :red, :green, :blue ].map do | component |
    mix = self.send(component) * self_parts
    mix += other.send(component) * other_parts 
    mix = mix.to_f
    mix /= self_parts + other_parts
    mix.to_i
  end
  Wx::Colour.new(*rgb)
end