Class: GrADS::Command::RGB

Inherits:
Object
  • Object
show all
Defined in:
lib/grads/command.rb

Constant Summary collapse

@@number = 
nil
@@table = 
{}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(r, g, b, a = 255) ⇒ RGB

Returns a new instance of RGB.



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# File 'lib/grads/command.rb', line 1031

def initialize (r, g, b, a=255)
  @r = r
  @g = g
  @b = b
  @a = a
end

Instance Attribute Details

#a ⇒ Object (readonly)

Returns the value of attribute a.



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# File 'lib/grads/command.rb', line 1038

def a
  @a
end

#b ⇒ Object (readonly)

Returns the value of attribute b.



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# File 'lib/grads/command.rb', line 1038

def b
  @b
end

#g ⇒ Object (readonly)

Returns the value of attribute g.



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# File 'lib/grads/command.rb', line 1038

def g
  @g
end

#r ⇒ Object (readonly)

Returns the value of attribute r.



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# File 'lib/grads/command.rb', line 1038

def r
  @r
end

Class Method Details

.next_number ⇒ Object 



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# File 'lib/grads/command.rb', line 1021

def self.next_number
  @@number += 1
  if @@number > 2047
    reset
  end
  return @@number
end

.reset ⇒ Object 



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# File 'lib/grads/command.rb', line 1017

def self.reset
  @@number = 100
end

Instance Method Details

#%(alpha) ⇒ Object 



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# File 'lib/grads/command.rb', line 1048

def % (alpha)
  if alpha >= 0 and alpha <= 1
    a = (@a*alpha).to_i
  else
    raise "invalid alpha value"
  end
  return RGB.new(@r, @g, @b, a)
end

#*(scale) ⇒ Object 



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# File 'lib/grads/command.rb', line 1057

def * (scale)
  if scale >= 0 and scale <= 1
    return RGB.new((@r*scale).to_i, (@g*scale).to_i, (@b*scale).to_i, @a)
  else
    raise "invalid scale value"
  end
end

#+(other) ⇒ Object 



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# File 'lib/grads/command.rb', line 1073

def + (other)
  r = [self.r, other.r].max
  g = [self.g, other.g].max
  b = [self.b, other.b].max
  a = [self.a, other.a].max
  return RGB.new(r,g,b,a)
end

#/(scale) ⇒ Object 



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# File 'lib/grads/command.rb', line 1065

def / (scale)
  if scale >= 1
    return RGB.new((@r/scale).to_i, (@g/scale).to_i, (@b/scale).to_i, @a)
  else
    raise "invalid scale value"
  end
end

#to_a ⇒ Object 



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# File 'lib/grads/command.rb', line 1044

def to_a
  return [@r, @g, @b, @a]
end

#to_s ⇒ Object 



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# File 'lib/grads/command.rb', line 1040

def to_s
  return format("%i %i %i %i", @r, @g, @b, @a)
end