Class: CosSinCalc::Triangle::Formatter

Inherits:
Object
  • Object
show all
Defined in:
lib/cossincalc/triangle/formatter.rb,
lib/cossincalc/triangle/formatter/latex.rb

Defined Under Namespace

Classes: Latex

Constant Summary collapse

UNIT_FACTORS = 
{ :radian => Math::PI, :degree => 180.0, :gon => 200.0 }

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(triangle, precision = 2) ⇒ Formatter

Returns a new instance of Formatter.



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# File 'lib/cossincalc/triangle/formatter.rb', line 8

def initialize(triangle, precision = 2)
  @triangle  = triangle
  @precision = precision
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args) ⇒ Object (private) 



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# File 'lib/cossincalc/triangle/formatter.rb', line 64

def method_missing(name, *args)
  if [:side, :altitude, :median, :angle_bisector, :area, :circumference].include?(name)
    format(t.send(name, *args), @precision)
  else
    super(name, *args)
  end
end

Instance Attribute Details

#precision ⇒ Object (readonly)

References to associated triangle object and data precision.



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# File 'lib/cossincalc/triangle/formatter.rb', line 6

def precision
  @precision
end

#triangle ⇒ Object (readonly)

References to associated triangle object and data precision.



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# File 'lib/cossincalc/triangle/formatter.rb', line 6

def triangle
  @triangle
end

Class Method Details

.convert_angle(value, unit, reverse = false) ⇒ Object

Converts the given value from the unit specified to radians. If reverse is true, the value will be converted from radians to the specified unit.



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# File 'lib/cossincalc/triangle/formatter.rb', line 30

def self.convert_angle(value, unit, reverse = false)
  return nil if value.nil?
  
  factor = (Math::PI / UNIT_FACTORS[unit.to_sym])
  value * (reverse ? 1.0 / factor : factor)
end

.parse(value) ⇒ Object

Converts an input value to a number.



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# File 'lib/cossincalc/triangle/formatter.rb', line 14

def self.parse(value)
  return value if value.is_a? Float
  return nil if value.nil? || value.to_s !~ /\S/
  
  value = value.to_s.gsub(/[^\d.,]+/, '').split(/[^\d]+/)
  value.push('.' + value.pop) if value.length > 1
  value.join.to_f
end

.parse_angle(value, from_unit) ⇒ Object

Converts an input angle value in some unit to a radian number.



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# File 'lib/cossincalc/triangle/formatter.rb', line 24

def self.parse_angle(value, from_unit)
  value.is_a?(Float) ? value : convert_angle(parse(value), from_unit)
end

Instance Method Details

#angle(v) ⇒ Object

Returns the size of the angle to the given variable, rounded and converted to the prefered unit.



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# File 'lib/cossincalc/triangle/formatter.rb', line 38

def angle(v)
  format(Formatter.convert_angle(t.angle(v), t.angles.unit, true), @precision)
end