Class: Doodl::Location

Inherits:
Object
  • Object
show all
Defined in:
lib/layout/layout.rb,
lib/layout/fr_layout.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(a, b) ⇒ Location

Returns a new instance of Location.



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# File 'lib/layout/layout.rb', line 152

def initialize(a, b)
  if a.is_a?(Numeric) and b.is_a?(Numeric)
    @x, @y = a, b
  else
    @x = b.x - a.x
    @y = b.y - a.y
  end
end

Instance Attribute Details

#x ⇒ Object

Returns the value of attribute x.



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# File 'lib/layout/layout.rb', line 150

def x
  @x
end

#y ⇒ Object

Returns the value of attribute y.



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# File 'lib/layout/layout.rb', line 150

def y
  @y
end

Instance Method Details

#*(scalar) ⇒ Object 



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# File 'lib/layout/layout.rb', line 177

def *(scalar)
  Location.new(scalar * @x, scalar * @y)
end

#+(other) ⇒ Object 



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# File 'lib/layout/layout.rb', line 169

def +(other)
  Location.new(@x + other.x, @y + other.y)
end

#-(other) ⇒ Object 



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# File 'lib/layout/layout.rb', line 173

def -(other)
  Location.new(@x - other.x, @y - other.y)
end

#-@ ⇒ Object 



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# File 'lib/layout/layout.rb', line 165

def -@
  self * (-1)
end

#/(scalar) ⇒ Object 



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# File 'lib/layout/layout.rb', line 181

def /(scalar)
  Location.new(@x / scalar, @y / scalar)
end

#add!(a, b = nil) ⇒ Object 



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# File 'lib/layout/layout.rb', line 197

def add!(a, b = nil)
  if b
    @x += a
    @y += b
  else
    @x += a.x
    @y += a.y
  end
  return self
end

#dist(other) ⇒ Object 



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# File 'lib/layout/layout.rb', line 161

def dist(other)
  Math.sqrt((@x - other.x) ** 2 + (@y - other.y) ** 2)
end

#div!(scalar) ⇒ Object 



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# File 'lib/layout/layout.rb', line 185

def div!(scalar)
  @x /= scalar
  @y /= scalar
  return self
end

#length ⇒ Object 



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# File 'lib/layout/layout.rb', line 216

def length
  Math.sqrt(@x**2 + @y**2)
end

#mul!(scalar) ⇒ Object 



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# File 'lib/layout/layout.rb', line 191

def mul!(scalar)
  @x *= scalar
  @y *= scalar
  return self
end

#normalize! ⇒ Object 



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# File 'lib/layout/layout.rb', line 220

def normalize!
  m = length
  div!(length)
  return self
end

#rotate!(theta) ⇒ Object 



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# File 'lib/layout/layout.rb', line 234

def rotate!(theta)
  self.rotate_radians!((Math::PI/180.0) * theta)
end

#rotate_radians!(theta) ⇒ Object 



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# File 'lib/layout/layout.rb', line 226

def rotate_radians!(theta)
  m = length
  a = Math.cos(theta) * @x - Math.sin(theta) * @y
  b = Math.sin(theta) * @x + Math.cos(theta) * @y
  @x, @y = a, b
  return self
end

#safedistance ⇒ Object 



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# File 'lib/layout/fr_layout.rb', line 100

def safedistance
  [self.length, Float::EPSILON].max
end

#sub!(a, b = nil) ⇒ Object 



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# File 'lib/layout/layout.rb', line 208

def sub!(a, b = nil)
  if b
    add!(-a, -b)
  else
    add!(-a)
  end
end