73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
// Copyright 2011-2014 Google
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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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//
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//
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// Common random routing stuff.
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#ifndef OR_TOOLS_TUTORIALS_CPLUSPLUS_ROUTING_RANDOM_H
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#define OR_TOOLS_TUTORIALS_CPLUSPLUS_ROUTING_RANDOM_H
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#include <string>
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#include <vector>
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#include "base/random.h"
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#include "constraint_solver/routing.h"
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#include "common/random.h"
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#include "routing_common/routing_common.h"
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namespace operations_research {
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class GenerateTWODCoordinates {
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public:
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GenerateTWODCoordinates(int32 size): size_(size), randomizer_(GetSeed()), coordinates_(size_) {
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Generate();
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}
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const Point Coordinate(RoutingModel::NodeIndex i) const {
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return coordinates_[i.value()];
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}
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const int32 Size() const {
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return size_;
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}
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private:
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void Generate() {
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bool coord_found = false;
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int32 x = 0;
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int32 y = 0;
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for (int32 i = 0; i < size_; i++) {
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coord_found = false;
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while (!coord_found) {
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x = randomizer_.Uniform(FLAGS_x_max);
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y = randomizer_.Uniform(FLAGS_y_max);
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// test if coordinates are not already taken
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// maybe we should ask for a minimum distance between points?
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coord_found = true;
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for (int32 j = 0; j < i; ++j) {
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if (x == coordinates_[j].x && y == coordinates_[j].y) {
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coord_found = false;
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break;
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}
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}
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}
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coordinates_[i] = Point(x, y);
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}
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}
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int32 size_;
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ACMRandom randomizer_;
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std::vector<Point> coordinates_;
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};
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} // namespace operations_research
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#endif // OR_TOOLS_TUTORIALS_CPLUSPLUS_ROUTING_RANDOM_H
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