Class: CartoCSSHelper::Scene

Inherits:
Object
  • Object
show all
Defined in:
lib/cartocss_helper/image_generator.rb

Overview

Defines and generates images for synthethic comparison it is mostly glue between renderer and generator of synthethic data files

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tags, zlevel, on_water, type, show_what_is_generated = false) ⇒ Scene

Returns a new instance of Scene.



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# File 'lib/cartocss_helper/image_generator.rb', line 16

def initialize(tags, zlevel, on_water, type, show_what_is_generated = false)
  @show_what_is_generated = show_what_is_generated
  raise 'tags not in hash' unless tags.respond_to?(:has_key?)
  @tags = tags
  @zlevel = zlevel
  @on_water = on_water
  @type = type
  if type == 'area'
    @tags['area'] = 'yes'
    @type = 'closed_way'
  end
  @generated_image_location = nil
end

Instance Attribute Details

#on_water ⇒ Object (readonly)

Returns the value of attribute on_water.



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# File 'lib/cartocss_helper/image_generator.rb', line 15

def on_water
  @on_water
end

#tags ⇒ Object (readonly)

Returns the value of attribute tags.



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# File 'lib/cartocss_helper/image_generator.rb', line 15

def tags
  @tags
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/cartocss_helper/image_generator.rb', line 15

def type
  @type
end

#zlevel ⇒ Object (readonly)

Returns the value of attribute zlevel.



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# File 'lib/cartocss_helper/image_generator.rb', line 15

def zlevel
  @zlevel
end

Instance Method Details

#flush_cache ⇒ Object 



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# File 'lib/cartocss_helper/image_generator.rb', line 41

def flush_cache
  File.delete(get_filename)
end

#get_image_filename(debug = false) ⇒ Object

TODO: misleading name - should be location



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# File 'lib/cartocss_helper/image_generator.rb', line 51

def get_image_filename(debug = false) # TODO: misleading name - should be location
  lat = 0
  lon = 20
  lon = 0 if @on_water
  if @generated_image_location != nil
    return @generated_image_location if File.exist?(@generated_image_location)
  end
  description = "tags: #{@tags}, zlevel: #{@zlevel}, type: #{@type} #{on_water_string}"
  puts "generating: #{description}" if @show_what_is_generated
  generate_map(lat, lon, debug)
  unless File.exist?(@generated_image_location) && @generated_image_location != nil
    raise "get_image failed - #{description}. File <\n#{@generated_image_location}\n> was expected."
  end
  return @generated_image_location
end

#is_output_different(another_scene) ⇒ Object 



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# File 'lib/cartocss_helper/image_generator.rb', line 30

def is_output_different(another_scene)
  raise 'on_water mismatch' if @on_water != another_scene.on_water
  return !is_output_identical(another_scene)
end

#is_output_identical(another_scene) ⇒ Object 



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# File 'lib/cartocss_helper/image_generator.rb', line 35

def is_output_identical(another_scene)
  raise 'on_water mismatch' if @on_water != another_scene.on_water
  # Returns true if the contents of a file A and a file B are identical.
  return FileUtils.compare_file(get_image_filename, another_scene.get_image_filename)
end

#on_water_string ⇒ Object 



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# File 'lib/cartocss_helper/image_generator.rb', line 45

def on_water_string
  on_water_string = ''
  on_water_string = 'on_water' if @on_water
  return on_water_string
end