67 lines
2.8 KiB
C++
67 lines
2.8 KiB
C++
// Copyright 2010-2025 Google LLC
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef ORTOOLS_CONSTRAINT_SOLVER_ROUTING_CONSTRAINTS_H_
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#define ORTOOLS_CONSTRAINT_SOLVER_ROUTING_CONSTRAINTS_H_
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#include <cstdint>
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#include <functional>
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#include <optional>
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#include <vector>
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#include "ortools/constraint_solver/constraint_solver.h"
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#include "ortools/constraint_solver/routing.h"
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namespace operations_research {
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Constraint* MakeDifferentFromValues(Solver* solver, IntVar* var,
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std::vector<int64_t> values);
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Constraint* MakeResourceConstraint(
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const RoutingModel::ResourceGroup* resource_group,
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const std::vector<IntVar*>* vehicle_resource_vars, RoutingModel* model);
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/// For every vehicle of the routing model:
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/// - if total_slacks[vehicle] is not nullptr, constrains it to be the sum of
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/// slacks on that vehicle, that is,
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/// dimension->CumulVar(end) - dimension->CumulVar(start) -
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/// sum_{node in path of vehicle} dimension->FixedTransitVar(node).
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/// - if spans[vehicle] is not nullptr, constrains it to be
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/// dimension->CumulVar(end) - dimension->CumulVar(start)
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/// This does stronger propagation than a decomposition, and takes breaks into
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/// account.
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Constraint* MakePathSpansAndTotalSlacks(const RoutingDimension* dimension,
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std::vector<IntVar*> spans,
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std::vector<IntVar*> total_slacks);
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Constraint* MakeRouteConstraint(
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RoutingModel* model, std::vector<IntVar*> route_cost_vars,
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std::function<std::optional<int64_t>(const std::vector<int64_t>&)>
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route_evaluator);
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Constraint* MakeGlobalVehicleBreaksConstraint(
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Solver* solver, const RoutingDimension* dimension);
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/// Makes inactive the vehicles which cannot cover the demand resulting from
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/// the transit variables of the active nodes given the maximum number of
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/// vehicles which can be active.
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Constraint* MakeNumActiveVehiclesCapacityConstraint(
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Solver* solver, std::vector<IntVar*> transit_vars,
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std::vector<IntVar*> active_vars, std::vector<IntVar*> vehicle_active_vars,
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std::vector<int64_t> vehicle_capacities, int max_active_vehicles,
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bool enforce_active_vehicles = false);
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} // namespace operations_research
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#endif // ORTOOLS_CONSTRAINT_SOLVER_ROUTING_CONSTRAINTS_H_
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