Class: Geometry::PointIso

Inherits:
Object
  • Object
show all
Defined in:
lib/geometry/point_iso.rb

Overview

An object repesenting a N-dimensional Point with identical elements.

Accessors collapse

Instance Attribute Summary collapse

Accessors collapse

Unary operators collapse

Instance Method Summary collapse

Constructor Details

#initialize(value) ⇒ PointIso

Initialize to the given value

Parameters:



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# File 'lib/geometry/point_iso.rb', line 14

def initialize(value)
    @value = value
end

Instance Attribute Details

#value ⇒ Number

Returns the value for every element.

Returns:

  • (Number) —

    the value for every element



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# File 'lib/geometry/point_iso.rb', line 10

def value
  @value
end

#x ⇒ Object (readonly) 



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# File 'lib/geometry/point_iso.rb', line 103

def x
    @value
end

#y ⇒ Object (readonly) 



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# File 'lib/geometry/point_iso.rb', line 109

def y
    @value
end

#z ⇒ Object (readonly) 



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# File 'lib/geometry/point_iso.rb', line 115

def z
    @value
end

Instance Method Details

#*(other) ⇒ Object

Raises:



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# File 'lib/geometry/point_iso.rb', line 157

def *(other)
    raise OperationNotDefined unless other.is_a? Numeric
    self.class.new(other * @value)
end

#+(other) ⇒ Object 



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# File 'lib/geometry/point_iso.rb', line 132

def +(other)
    case other
	when Numeric
	    other + @value
	when Size
	    Point[other.map {|a| a + @value }]
	else
	    if other.respond_to?(:map)
		other.map {|a| a + @value }
	    else
		Point[other + @value]
	    end
    end
end

#+@ ⇒ Object 



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# File 'lib/geometry/point_iso.rb', line 123

def +@
    self
end

#-(other) ⇒ Object 



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# File 'lib/geometry/point_iso.rb', line 147

def -(other)
    if other.is_a? Size
	Point[other.map {|a| @value - a }]
    elsif other.respond_to? :map
	other.map {|a| @value - a }
    else
	@value - other
    end
end

#-@ ⇒ Object 



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# File 'lib/geometry/point_iso.rb', line 127

def -@
    self.class.new(-@value)
end

#/(other) ⇒ Object

Raises:



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# File 'lib/geometry/point_iso.rb', line 162

def /(other)
    raise OperationNotDefined unless other.is_a? Numeric
    raise ZeroDivisionError if 0 == other
    self.class.new(@value / other)
end

#[](i) ⇒ Numeric

Returns Element i (starting at 0).

Parameters:

Returns:

  • (Numeric) —

    Element i (starting at 0)



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# File 'lib/geometry/point_iso.rb', line 97

def [](i)
    @value
end

#coerce(other) ⇒ Object 



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# File 'lib/geometry/point_iso.rb', line 27

def coerce(other)
    if other.is_a? Numeric
	[other, @value]
    elsif other.is_a? Array
	[other, Array.new(other.size, @value)]
    elsif other.is_a? Vector
	[other, Vector[*Array.new(other.size, @value)]]
    else
	[Point[other], Point[Array.new(other.size, @value)]]
    end
end

#eql?(other) ⇒ Boolean Also known as: ==

Returns:

  • (Boolean) 


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# File 'lib/geometry/point_iso.rb', line 18

def eql?(other)
    if other.respond_to? :all?
	other.all? {|e| e.eql? @value}
    else
	other == @value
    end
end

#inspect ⇒ Object 



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# File 'lib/geometry/point_iso.rb', line 39

def inspect
    'PointIso<' + @value.inspect + '>'
end

#is_a?(klass) ⇒ Boolean Also known as: kind_of?

Returns:

  • (Boolean) 


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# File 'lib/geometry/point_iso.rb', line 46

def is_a?(klass)
    (klass == Point) || super
end

#max(*args) ⇒ Number, Point

Returns:



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# File 'lib/geometry/point_iso.rb', line 60

def max(*args)
    if args.empty?
	@value
    else
	args = args.first if 1 == args.size
	Point[Array.new(args.size, @value).zip(args).map(&:max)]
    end
end

#min(*args) ⇒ Number, Point

Returns:



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# File 'lib/geometry/point_iso.rb', line 73

def min(*args)
    if args.empty?
	@value
    else
	args = args.first if 1 == args.size
	Point[Array.new(args.size, @value).zip(args).map(&:min)]
    end
end

#minmax(*args) ⇒ Array<Number>, Array<Point>

Returns:



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# File 'lib/geometry/point_iso.rb', line 86

def minmax(*args)
    if args.empty?
	[@value, @value]
    else
	[min(*args), max(*args)]
    end
end

#to_ary ⇒ Object

This is a hack to get Array#== to work properly. It works on ruby 2.0 and 1.9.3.



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# File 'lib/geometry/point_iso.rb', line 52

def to_ary
    []
end

#to_s ⇒ Object 



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# File 'lib/geometry/point_iso.rb', line 42

def to_s
    'PointIso<' + @value.to_s + '>'
end