Class: Amaze::Formatter::Image

Inherits:
Object
  • Object
show all
Defined in:
lib/amaze/formatter/image.rb

Direct Known Subclasses

Delta, Ortho, Polar, Sigma, Upsilon

Defined Under Namespace

Classes: Delta, Ortho, Polar, Sigma, Upsilon

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(grid, options = {}) ⇒ Image

Returns a new instance of Image.



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# File 'lib/amaze/formatter/image.rb', line 17

def initialize grid, options={}
  @grid = grid
  @options = options
end

Instance Attribute Details

#grid ⇒ Object (readonly)

The grid



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# File 'lib/amaze/formatter/image.rb', line 12

def grid
  @grid
end

#options ⇒ Object (readonly)

Options for the Image renderer



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# File 'lib/amaze/formatter/image.rb', line 15

def options
  @options
end

Class Method Details

.colors ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 124

def self.colors
  Magick.colors.map(&:name)
end

Instance Method Details

#background_color ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 86

def background_color
  @options[:background_color].to_s || 'white'
end

#border_width ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 66

def border_width
  @options[:border_width] || 0
end

#canvas ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 53

def canvas
  @canvas ||= Magick::Draw.new
end

#cell_offset ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 98

def cell_offset
  wall_width / 2.0 + border_width
end

#cell_width ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 62

def cell_width
  @options[:cell_width] || 100
end

#distance_color(cell) ⇒ Object

Returns the background color of a cell, depending on its distance from the origin



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# File 'lib/amaze/formatter/image.rb', line 111

def distance_color cell
  if distances && distances[cell]
    intensity = (distances_max - distances[cell].to_f) / distances_max
    '#' + gradient.at(intensity).color.hex
  else
    nil
  end
end

#distances ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 102

def distances
  options[:distances]
end

#distances_max ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 106

def distances_max
  @distances_max ||= distances.max[1]
end

#gradient ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 120

def gradient
  options[:gradient_map]
end

#hide_walls? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/amaze/formatter/image.rb', line 94

def hide_walls?
  @options[:hide_walls]
end

#image ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 49

def image
  @image ||= Magick::Image.new image_width, image_height, Magick::SolidFill.new(background_color)
end

#path?(direction, cell) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/amaze/formatter/image.rb', line 22

def path? direction, cell
  cell.linked?(cell.send(direction)) && path_cell?(cell.send(direction))
end

#path_cell?(cell) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/amaze/formatter/image.rb', line 26

def path_cell? cell
  path_cells.include? cell
end

#path_cells ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 30

def path_cells
  Array(options[:path_cells])
end

#path_color ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 82

def path_color
  @options[:path_color].to_s || 'red'
end

#path_finish ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 38

def path_finish
  options[:path_finish]
end

#path_start ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 34

def path_start
  options[:path_start]
end

#path_width ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 78

def path_width
  @options[:path_width] || 3
end

#render ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 42

def render
  render_background if distances
  render_grid if show_grid?
  render_wall unless hide_walls?
  render_path if path_cells.any?
end

#show_grid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/amaze/formatter/image.rb', line 90

def show_grid?
  @options[:show_grid]
end

#wall_color ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 74

def wall_color
  @options[:wall_color].to_s || 'black'
end

#wall_width ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 70

def wall_width
  @options[:wall_width] || 5
end

#write(filename) ⇒ Object 



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# File 'lib/amaze/formatter/image.rb', line 57

def write filename
  canvas.draw image
  image.write(filename)
end