3d grid has 26 neighbors

Author: cloudwu

README.md

@@ -46,7 +46,7 @@ int heuristic(void *ud, unsigned int pos, struct pathfinding_neighbor result[]);
 The coord should be encoded into a unsigned int, the typical way is `(x << 16) | y`.
 
 The heuristic function should returns a pathfinding_neighbor array, which describes the set of positions connected to the location.
-The maximum number of the result[] is 16, usually 8 is enough.
+The maximum number of the result[] is 32, usually 8 is enough.
 
 * `.pos` : The position of the connection.
 * `.dist` : The distance to the location.

pathfinding.c

@@ -25,7 +25,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <string.h>
 #include <assert.h>
 
-#define NEIGHBOR_MAX 16
+// 3D grid has 26 neighbors
+#define NEIGHBOR_MAX 32
 
 typedef unsigned int uint;