Class: Grid

Inherits:
Object
  • Object
show all
Defined in:
lib/gem_with_extension_example/grid.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(width, height, default_value = nil) ⇒ Grid

Returns a new instance of Grid.



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# File 'lib/gem_with_extension_example/grid.rb', line 6

def initialize(width, height, default_value = nil)
  @width = width
  @height = height
  @default_value = default_value
  @grid = create(width, height, default_value)
end

Instance Attribute Details

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/gem_with_extension_example/grid.rb', line 4

def height
  @height
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/gem_with_extension_example/grid.rb', line 4

def width
  @width
end

Instance Method Details

#[](x, y) ⇒ Object 



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# File 'lib/gem_with_extension_example/grid.rb', line 13

def [](x,y)
  if (x < 0 or x >= @width) or (y < 0 or y >= @height)
    throw Error("Grid index out of bounds. [%d][%d] not in range ([0 through %d][0 through %d])" % [x, y, width - 1, height - 1])
  end
  @grid[x][y]
end

#[]=(x, y, a) ⇒ Object 



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# File 'lib/gem_with_extension_example/grid.rb', line 20

def []=(x,y,a)
  if (x < 0 or x >= @width) or (y < 0 or y >= @height)
    throw Error("Grid index out of bounds. [%d][%d] not in range ([0 through %d][0 through %d])" % [x, y, width - 1, height - 1])
  end
  @grid[x][y] = a
end

#clear(value = nil) ⇒ Object 



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# File 'lib/gem_with_extension_example/grid.rb', line 27

def clear(value=nil)
  (0...@width).each do |xi|
    (0...@height).each do |yi|
      @grid[xi][yi] = value
    end
  end
end

#each ⇒ Object 



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# File 'lib/gem_with_extension_example/grid.rb', line 45

def each
  @grid.each do |c|
    c.each{|i| yield i}
  end
end

#each_col ⇒ Object 



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# File 'lib/gem_with_extension_example/grid.rb', line 41

def each_col
  @grid.each{|c| yield c.dup}
end

#fill_complex(x0, y0, x1, y1) ⇒ Object

Generate a two dimensional grid of float pairs, evenly distributed across width x height samples ranging from x0 to x1 and y0 to y1



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# File 'lib/gem_with_extension_example/grid.rb', line 54

def fill_complex(x0, y0, x1, y1)
  x_range = x1 - x0
  y_range = y1 - y0

  width_limit = Float(@width - 1)
  height_limit = Float(@height - 1)

  (0...@width).each do |xi|
    x_unit = Float(xi) / width_limit
    x = x0 + (x_unit * x_range)

    (0...@height).each do |yi|
      y_unit = Float(yi) / height_limit
      y = y0 + (y_unit * y_range)
      @grid[xi][yi] = Complex(x,y)
      #@grid[xi][yi] = [x,y]
    end
  end
end

#fill_test ⇒ Object 



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# File 'lib/gem_with_extension_example/grid.rb', line 74

def fill_test()
  t = 0
  @grid.each_with_index do |c, x|
    c.each_with_index{|i, y| @grid[x][y] = t; t += 1}
  end
end

#to_s ⇒ Object 



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# File 'lib/gem_with_extension_example/grid.rb', line 35

def to_s
  s = ""
  @grid.each{|c| s << c.to_s << "\n"}
  return s
end