Class: CVFFI::Scalar

Inherits:
Object
  • Object
show all
Defined in:
lib/opencv-ffi-wrappers/core/scalar.rb

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Scalar

Returns a new instance of Scalar.



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# File 'lib/opencv-ffi-wrappers/core/scalar.rb', line 31

def initialize( *args )
  @order = :BGR
  w=x=y=z=0

  if args[0].is_a?( Hash )
    args = args[0]

    @order = args[:channel_order] if args[:channel_order]
    a,b,c,d = color_symbols

    w = args[:w] || args[a] || args[a.upcase] || 0
    x = args[:x] || args[b] || args[b.upcase] || 0
    y = args[:y] || args[c] || args[c.upcase] || 0
    z = args[:z] || args[d] || args[d.upcase] || 0
  else
    w,x,y,z = args
  end

  @s = CVFFI::CvScalar.new( :w => w, :x => x, :y => y, :z => z )
end

Instance Method Details

#[](i) ⇒ Object 



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# File 'lib/opencv-ffi-wrappers/core/scalar.rb', line 83

def [](i)
  a,b,c,d = color_symbols

  case i.downcase
  when :w,a then
    @s.w
  when :x,b then
    @s.x
  when :y,c then
    @s.y
  when :z,d then
    @s.z
  else
    nil
  end
end

#[]=(i, x) ⇒ Object 



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# File 'lib/opencv-ffi-wrappers/core/scalar.rb', line 65

def []=(i,x)
  a,b,c,d = color_symbols

  case i.downcase
  when :w,a then
    @s.w = x
  when :x,b then
    @s.x = x
  when :y,c then
    @s.y = x
  when :z,d then
    @s.z = x
  else 
    raise "Hm, don't understand index to CVFFI::Scalar[]="
  end
end

#color_symbols ⇒ Object 



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# File 'lib/opencv-ffi-wrappers/core/scalar.rb', line 52

def color_symbols
  case @order
  when :BGR then
    [ :b, :g, :r, :a ]
  else
    raise "Hm, the Scalar::order is undefined"
  end
end

#to_CvScalar ⇒ Object 



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# File 'lib/opencv-ffi-wrappers/core/scalar.rb', line 61

def to_CvScalar
  @s
end

#to_s ⇒ Object 



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# File 'lib/opencv-ffi-wrappers/core/scalar.rb', line 100

def to_s
  "CvScalar(#{ [@s.w, @s.w, @s.y, @s.z].join(',') })"
end