Function GridGraph.SetDimensions

void SetDimensions (

int	width
int	depth
float	nodeSize

)

Updates unclampedSize from width, depth and nodeSize values.

Also generates a new matrix .

You should use this method instead of setting the width and depth fields as the grid dimensions are not defined by the width and depth variables but by the unclampedSize and center variables.

var gg = AstarPath.active.data.gridGraph;
var width = 80;
var depth = 60;
var nodeSize = 1.0f;

gg.SetDimensions(width, depth, nodeSize);

// Recalculate the graph
AstarPath.active.Scan();