Class: GeoTreeModule::Bounds

Inherits:
Object
  • Object
show all
Defined in:
lib/geotree/bounds.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(x = 0, y = 0, w = 0, h = 0) ⇒ Bounds

Constructor. If x is a Float, it assumes that x,y,w,h are expressed in terms of latitudes and longitudes, and converts them to integers accordingly.



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# File 'lib/geotree/bounds.rb', line 10

def initialize(x=0,y=0,w=0,h=0)
  if x.is_a? Float
    x1 = Loc.cvt_latlong_to_int(x)
    y1 = Loc.cvt_latlong_to_int(y)
    w = Loc.cvt_latlong_to_int(x+w) - x1
    h = Loc.cvt_latlong_to_int(y+h) - y1
    x,y = x1,y1
  end

  @x = x
  @y = y
  @w = w
  @h = h
end

Instance Attribute Details

#h ⇒ Object

Returns the value of attribute h.



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# File 'lib/geotree/bounds.rb', line 5

def h
  @h
end

#w ⇒ Object

Returns the value of attribute w.



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# File 'lib/geotree/bounds.rb', line 5

def w
  @w
end

#x ⇒ Object

Returns the value of attribute x.



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# File 'lib/geotree/bounds.rb', line 5

def x
  @x
end

#y ⇒ Object

Returns the value of attribute y.



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# File 'lib/geotree/bounds.rb', line 5

def y
  @y
end

Class Method Details

.intersect(a, b) ⇒ Object 



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# File 'lib/geotree/bounds.rb', line 49

def self.intersect(a,b)
  a.x2 > b.x && b.x2 > a.x && a.y2 > b.y && b.y2 > a.y
end

.rnd ⇒ Object

Construct a random bounds



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# File 'lib/geotree/bounds.rb', line 55

def self.rnd
  x1 = rand(1000)
  y1 = rand(1000)
  x2 = rand(1000)
  y2 = rand(1000)
  x1,x2 = [x1,x2].min,[x1,x2].max
  y1,y2 = [y1,y2].min,[y1,y2].max
  sz = rand() * rand() * 1000
  sz = [sz.to_i,1].max
  ix = [0,x2-x1-sz].max
  iy = [0,y2-y1-sz].max
  sx = (x2-x1-ix)/2
  sy = (y2-y1-iy)/2

  cx = (x1+x2)/2
  cy = (y1+y2)/2
  Bounds.new(cx-sx,cy-sy,sx*2,sy*2)
end

.rnd_many(count) ⇒ Object 



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# File 'lib/geotree/bounds.rb', line 74

def self.rnd_many(count)
  a = []
  count.times{a << self.rnd}
  a
end

Instance Method Details

#contains_point(loc) ⇒ Object 



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# File 'lib/geotree/bounds.rb', line 41

def contains_point(loc)
  loc.x >= @x && loc.x < x2 && loc.y >= @y && loc.y < y2
end

#flip ⇒ Object 



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# File 'lib/geotree/bounds.rb', line 45

def flip
  Bounds.new(@y,@x,@h,@w)
end

#inspect ⇒ Object 



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# File 'lib/geotree/bounds.rb', line 37

def inspect
  to_s
end

#to_s ⇒ Object 



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# File 'lib/geotree/bounds.rb', line 33

def to_s
  "[#{@x},#{@y}..#{x2},#{y2}]"
end

#x2 ⇒ Object 



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# File 'lib/geotree/bounds.rb', line 25

def x2
  @x + @w
end

#y2 ⇒ Object 



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# File 'lib/geotree/bounds.rb', line 29

def y2
  @y + @h
end