Class: Fuelator::Calc

Inherits:
Object
  • Object
show all
Defined in:
lib/fuelator/calc.rb

Overview

Calculate fuel for a flight

Example:

>> Fuelator.Calc.new(28801, [[:launch, 9.807], [:land, 1.62], [:launch, 1.62], [:land, 9.807]]).run
=> 51898

Constant Summary collapse

FLIGHT_CONSTANTS = 
{
  launch: {
    theta: 0.042,
    bias:  33,
  },
  land:   {
    theta: 0.033,
    bias:  42,
  },
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(mass, pairs) ⇒ Calc

Returns a new instance of Calc.



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# File 'lib/fuelator/calc.rb', line 27

def initialize(mass, pairs)
  @parameters = Parameters.new(mass, pairs)
end

Instance Attribute Details

#parameters ⇒ Object (readonly)

Returns the value of attribute parameters.



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# File 'lib/fuelator/calc.rb', line 10

def parameters
  @parameters
end

Class Method Details

.run(mass, pairs) ⇒ Object 



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# File 'lib/fuelator/calc.rb', line 23

def self.run(mass, pairs)
  new(mass, pairs).run
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/fuelator/calc.rb', line 31

def run
  parameters.validate!
  full_mass = parameters.mass

  parameters.reversed.map do |val|
    full_mass += recursive_calculate(full_mass, val)
  end.last - parameters.mass
end