Pathfinding is a kind of problem widely used in daily life. It is widely used in network games, map navigation and other fields. However, the traditional A* algorithm has some shortcomings, such as heuristic function ...Pathfinding is a kind of problem widely used in daily life. It is widely used in network games, map navigation and other fields. However, the traditional A* algorithm has some shortcomings, such as heuristic function needs to be designed according to different problems, path has many inflection points, and algorithm stability is poor. B* algorithm also has the shortcoming of inaccurate pathfinding. In order to solve the problems existing in A* and B* algorithms, obstacle avoidance regeneration mechanism, pre-exploration mechanism and equivalent waiting strategy are proposed. It adds a bidirectional parallel search mechanism to form an IBP-B* algorithm (Intelligent bi-directional parallel B* routing algorithm). The simulation results show that the speed of IBP-B* algorithm is 182% higher than that of A* algorithm and 366% higher than that of BFS algorithm. Meanwhile, compared with B* algorithm, IBP-B* algorithm improves the pathfinding accuracy of the algorithm.展开更多
Through a precise recursion of B-spline bases, this paper presents an efficient algorithm for the calculation of NURBS curves and all their derivatives. The algorithm requires less storage and is proved to be stable.
文摘Pathfinding is a kind of problem widely used in daily life. It is widely used in network games, map navigation and other fields. However, the traditional A* algorithm has some shortcomings, such as heuristic function needs to be designed according to different problems, path has many inflection points, and algorithm stability is poor. B* algorithm also has the shortcoming of inaccurate pathfinding. In order to solve the problems existing in A* and B* algorithms, obstacle avoidance regeneration mechanism, pre-exploration mechanism and equivalent waiting strategy are proposed. It adds a bidirectional parallel search mechanism to form an IBP-B* algorithm (Intelligent bi-directional parallel B* routing algorithm). The simulation results show that the speed of IBP-B* algorithm is 182% higher than that of A* algorithm and 366% higher than that of BFS algorithm. Meanwhile, compared with B* algorithm, IBP-B* algorithm improves the pathfinding accuracy of the algorithm.
文摘Through a precise recursion of B-spline bases, this paper presents an efficient algorithm for the calculation of NURBS curves and all their derivatives. The algorithm requires less storage and is proved to be stable.
