Diagonal Movement

To disable diagonal movement you need to configure the finder. The finder takes a configuration object with an option called diagonalMovement. Setting this option to DiagonalMovement.Never will disable diagonal movement completely. Let us try it.

var finder = new PF.AStarFinder({
    diagonalMovement: PF.DiagonalMovement.Never
});

See that the path is straight now:

The diagonalMovement option can take any of the following values:

• Always
• Never
• IfAtMostOneObstacle
• OnlyWhenNoObstacles

To understand them consider the following four simple maps labelled A, B, C and D. A has no obstacles for diagonal movement from green to orange cell, B and C have one obstacle and D has two obstacles.

Always

With this option PathFinding.js will always find a diagonal path, irrespective of the obstacles when moving diagonally.

Never

With this option PathFinding.js will only find straight paths and will never find any diagonal paths.

IfAtMostOneObstacle

With this option PathFinding.js will find diagonal paths only if there is at most one obstacle for the diagonal path.

OnlyWhenNoObstacles

With this option PathFinding.js will find diagonal paths only if there are no obstacles for the diagonal path.