A* Star Pathfinding

Dijkstra’s Algorithm (Left). A* Algorithm (Right). Source.

Algorithm and Time complexity.

  • The G score is the distance the algorithm has traveled since the start node, every node has a distance 1 from each other, so a smaller G score means a smaller path.
  • The F score is the heuristic function value, this function is similar to a distance formula from one node to the end node, the smaller the F score is, the closer we are.
On the right we are tricking the algorithm as it approaches the end node through a dead end.
Operations count on the left of the code, and some notes on the right.

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