Class: ORTools::MathOpt::Model

Inherits:
Object
  • Object
show all
Defined in:
lib/or_tools/math_opt/model.rb

Instance Method Summary collapse

Instance Method Details

#add_linear_constraint(expr) ⇒ Object 



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# File 'lib/or_tools/math_opt/model.rb', line 4

def add_linear_constraint(expr)
  left, op, const = Utils.index_constraint(expr)

  constraint = _add_linear_constraint
  left.each do |var, c|
    _set_coefficient(constraint, var, c)
  end
  case op
  when :<=
    _set_upper_bound(constraint, const)
  when :>=
    _set_lower_bound(constraint, const)
  when :==
    _set_lower_bound(constraint, const)
    _set_upper_bound(constraint, const)
  else
    raise ArgumentError, "Supported operations are ==, <=, and >="
  end
  nil
end

#maximize(objective) ⇒ Object 



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# File 'lib/or_tools/math_opt/model.rb', line 25

def maximize(objective)
  set_objective(objective)
  _set_maximize
end

#minimize(objective) ⇒ Object 



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# File 'lib/or_tools/math_opt/model.rb', line 30

def minimize(objective)
  set_objective(objective)
  _set_minimize
end

#solve(solver_type = :glop) ⇒ Object

TODO change default for MIP



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# File 'lib/or_tools/math_opt/model.rb', line 36

def solve(solver_type = :glop)
  _solve(solver_type)
end