Game Development Reference
In-Depth Information
How to do it...
We start by defining the class that will generate the paths for us. This part will be imple-
mented by performing the following steps:
1. We create a new class called
PathfinderThread
, which extends the
Thread
class.
2. It needs a couple of fields, a
Vector3f
called
target
, a
NavMeshPathfinder
called
pathfinder
, and two Booleans,
pathfind-
ing
and
running
, where
running
should be set to
true
by default.
3. The constructor should take a
NavMesh
object as input, and we instantiate the
pathfinder
with the same, as shown in the following code:
public PathfinderThread(NavMesh navMesh) {
pathfinder = new NavMeshPathfinder(navMesh);
this.setDaemon(true);
}
4. We override the
run
method to handle
pathfinding
. While running is
true
,
the following logic should apply:
if (target != null) {
pathfinding = true;
pathfinder.setPosition(getSpatial().getWorldTranslation());
boolean success = pathfinder.computePath(target);
if (success) {
target = null;
}
pathfinding = false;
}
5. If
target
is not
null
, we set
pathfinding
to
true
.
6. Then we set the start position of the pathfinder to the AI's current position, as
shown in the following code:
pathfinder.setPosition(getSpatial().getWorldTranslation());
7. If the pathfinder can find a path, we set
target
to
null
.
8. In either case, pathfinding is done, and
pathfinding
is set to
false
.
