/// <summary>
/// Generates a path for an NPC to wander. The path will not leave the defined wander area
/// which ensures that the NPC doesn't leave its area and wander to a different plain on the NavMesh
/// (given that the NPC is placed near a canyon or similar).
/// </summary>
/// <param name="wanderArea">The area to generate the path in</param>
/// <param name="agent">The agent of the NPC to generate the path for</param>
/// <param name="areaMask">The NavMesh area the entity is allowed to move in</param>
/// <returns>The next wander path</returns>
public NavMeshPath GetNextWanderPath(Area wanderArea, NavMeshAgent agent, int areaMask)
{
NavMeshPath path = new NavMeshPath();
do
{
Vector3 wanderPoint = _navMeshMapper.GetMappedRandomPoint(wanderArea, areaMask);
agent.CalculatePath(wanderPoint, path);
}while (!IsPathInArea(wanderArea, path));
return(path);
}
/// <summary>
/// Try spawning an NPC. The NPC might not consist in the scene
/// (but will be destroyed before it is made visible if it's in the player's sight).
/// </summary>
protected virtual void TrySpawn()
{
Vector3 spawnLocation = _navMeshMapper.GetMappedRandomPoint(spawnArea, NavMesh.AllAreas);
// setting a random rotation doesn't seem to work with a NavMeshAgent, but since NPCs start walking in a random direction immediately it doesn't really matter
EnemyController spawned = Instantiate(toSpawn, spawnLocation, Quaternion.identity, transform);
Renderer renderer = spawned.Renderer;
// could RenderChecker instead, but no advantages for now
if (!renderer.InFrustum(mainCamera))
{
renderer.enabled = true;
}
else
{
Destroy(spawned.gameObject);
}
}