Module: CosSinCalc::Triangle::Calculator

Includes:
Math
Included in:
CosSinCalc::Triangle
Defined in:
lib/cossincalc/triangle/calculator.rb

Instance Method Summary collapse

Instance Method Details

#calculate_angle_by_sides(v, r) ⇒ Object

Calculates the value of an angle when all the sides are known.



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# File 'lib/cossincalc/triangle/calculator.rb', line 21

def calculate_angle_by_sides(v, r)
  acos (sq(sides(r)).inject(&:+) - sq(side(v))) / (2 * sides(r).inject(&:*))
end

#calculate_side_and_angle ⇒ Object

Calculates the last unknown angle and side. This function is public so it is derectly callable (used with ambiguous case).



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# File 'lib/cossincalc/triangle/calculator.rb', line 16

def calculate_side_and_angle
  calculate_two_sides
end

#calculate_variables ⇒ Object 



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

def calculate_variables
  case sides.amount
  when 3 then calculate_three_angles
  when 2 then calculate_two_angles
  when 1 then calculate_two_sides
  end
end

#equation(latex, *variables) ⇒ Object

Add a calculation step to the list of equations performed.



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# File 'lib/cossincalc/triangle/calculator.rb', line 26

def equation(latex, *variables)
  @equations ||= []
  @equations << [latex, variables]
end