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A* algorithm pseudocode

Toni Sadara answered on May 20, 2022 Popularity 10/10 Helpfulness 2/10

answer A* algorithm pseudocode

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A* algorithm pseudocode

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// A* (star) Pathfinding// Initialize both open and closed list
let the openList equal empty list of nodes
let the closedList equal empty list of nodes// Add the start node
put the startNode on the openList (leave it's f at zero)// Loop until you find the end
while the openList is not empty    // Get the current node
    let the currentNode equal the node with the least f value
    remove the currentNode from the openList
    add the currentNode to the closedList    // Found the goal
    if currentNode is the goal
        Congratz! You've found the end! Backtrack to get path    // Generate children
    let the children of the currentNode equal the adjacent nodes
    
    for each child in the children        // Child is on the closedList
        if child is in the closedList
            continue to beginning of for loop        // Create the f, g, and h values
        child.g = currentNode.g + distance between child and current
        child.h = distance from child to end
        child.f = child.g + child.h        // Child is already in openList
        if child.position is in the openList's nodes positions
            if the child.g is higher than the openList node's g
                continue to beginning of for loop        // Add the child to the openList
        add the child to the openList

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Source: medium.com

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Contributed on May 20 2022

Toni Sadara

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1. If the matrix A has no columns, the current partial solution
   is a valid solution; terminate successfully. 
2. Otherwise, choose a column c (deterministically). 
3. Choose a row r such that A[r] = 1 (nondeterministically). 
4. Include row r in the partial solution. 
5. For each column j such that A[r][j] = 1,
        for each row i such that A[i][j] = 1, 
            delete row i from matrix A. 
      delete column j from matrix A. 
6. Repeat this algorithm recursively on the reduced matrix A.

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Source: www.geeksforgeeks.org

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Contributed on May 23 2022

rastr__

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A* algorithm pseudocode

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