Class: GeoWeb::Projection::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/geoweb/projection/base.rb

Direct Known Subclasses

Linear, Mercator

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(zoom, t = Transformation.new(1, 0, 0, 0, 1, 0)) ⇒ Base

Returns a new instance of Base.



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# File 'lib/geoweb/projection/base.rb', line 7

def initialize(zoom, t=Transformation.new(1, 0, 0, 0, 1, 0))
  @zoom = zoom
  @transformation = t
end

Instance Attribute Details

#transformation ⇒ Object

Returns the value of attribute transformation.



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# File 'lib/geoweb/projection/base.rb', line 5

def transformation
  @transformation
end

#zoom ⇒ Object

Returns the value of attribute zoom.



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# File 'lib/geoweb/projection/base.rb', line 5

def zoom
  @zoom
end

Instance Method Details

#coordinate_location(coordinate) ⇒ Object 



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# File 'lib/geoweb/projection/base.rb', line 32

def coordinate_location(coordinate)
  coordinate = coordinate.zoom_to(self.zoom)
  point = Point.new(coordinate.x, coordinate.y)
  point = self.unproject(point)
  LatLon.new(point).to_deg
end

#location_coordinate(latlon) ⇒ Object 



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# File 'lib/geoweb/projection/base.rb', line 27

def location_coordinate(latlon)
  point = self.project(latlon.to_rad)
  Coordinate.new(point.x, point.y, self.zoom)
end

#project(point) ⇒ Object 



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# File 'lib/geoweb/projection/base.rb', line 15

def project(point)
  point = self.raw_project(point)
  point = transformation.transform(point) unless transformation.nil?
  point
end

#raw_project(point) ⇒ Object 



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# File 'lib/geoweb/projection/base.rb', line 12

def raw_project(point); nil; end

#raw_unproject(point) ⇒ Object 



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# File 'lib/geoweb/projection/base.rb', line 13

def raw_unproject(point); nil; end

#unproject(point) ⇒ Object 



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# File 'lib/geoweb/projection/base.rb', line 21

def unproject(point)
  point = transformation.untransform(point) unless transformation.nil?
  point = self.raw_unproject(point)
  point
end