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@cyberfox
Last active December 27, 2019 06:41
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Use tags to automatically add spawned GameObjects to the list of followers-of-the-leader.
using System;
using System.Collections.Generic;
using Pathfinding;
using UnityEngine;
namespace BehaviorDesigner.Runtime.Tasks.Movement.AstarPathfindingProject
{
[TaskDescription("Tagged GameObjects Follow the leader with the A* Pathfinding Project.")]
[TaskCategory("Movement/A* Pathfinding Project")]
[TaskIcon("Assets/Behavior Designer Movement/Editor/Icons/{SkinColor}LeaderFollowIcon.png")]
class TaggedLeaderFollow : LeaderFollow
{
[Tooltip("Tag to generate a list of agents")]
public String agentTag;
public override TaskStatus OnUpdate()
{
/**
* We're going to set up agents depending on tag, if a tag is present.
*/
if (!string.IsNullOrEmpty(agentTag))
{
GameObject[] tagged = GameObject.FindGameObjectsWithTag(agentTag);
if (AnyNewAgents(tagged))
{
agents = new SharedGameObject[tagged.Length];
for (int i = 0; i < tagged.Length; i++)
{
agents[i] = tagged[i];
}
aStarAgents = new IAstarAI[agents.Length];
transforms = new Transform[agents.Length];
// Set the speed and turning speed of all of the agents
for (int i = 0; i < agents.Length; ++i)
{
aStarAgents[i] = agents[i].Value.GetComponent<IAstarAI>();
transforms[i] = agents[i].Value.transform;
aStarAgents[i].maxSpeed = speed.Value;
}
}
}
return base.OnUpdate();
}
private bool AnyNewAgents(GameObject[] tagged)
{
// Short circuit the obvious and common case.
if (tagged.Length > agents.Length) return true;
bool hasAll = true;
HashSet<int> knownAgents = new HashSet<int>();
foreach (var agent in agents)
{
knownAgents.Add(agent.Value.GetInstanceID());
}
foreach (var obj in tagged)
{
hasAll = hasAll && knownAgents.Contains(obj.GetInstanceID());
}
return !hasAll;
}
}
}
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