78 lines
2.2 KiB
C#
78 lines
2.2 KiB
C#
using UnityEngine;
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using System.Linq;
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namespace Pathfinding {
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/// <summary>
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/// Moves the target in example scenes.
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/// This is a simple script which has the sole purpose
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/// of moving the target point of agents in the example
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/// scenes for the A* Pathfinding Project.
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///
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/// It is not meant to be pretty, but it does the job.
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/// </summary>
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[HelpURL("http://arongranberg.com/astar/docs/class_pathfinding_1_1_target_mover.php")]
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public class TargetMover : MonoBehaviour {
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/// <summary>Mask for the raycast placement</summary>
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public LayerMask mask;
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public Transform target;
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IAstarAI[] ais;
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/// <summary>Determines if the target position should be updated every frame or only on double-click</summary>
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public bool onlyOnDoubleClick;
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public bool use2D;
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Camera cam;
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public void Start () {
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//Cache the Main Camera
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cam = Camera.main;
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// Slightly inefficient way of finding all AIs, but this is just an example script, so it doesn't matter much.
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// FindObjectsOfType does not support interfaces unfortunately.
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ais = FindObjectsOfType<MonoBehaviour>().OfType<IAstarAI>().ToArray();
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useGUILayout = false;
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}
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public void OnGUI () {
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if (onlyOnDoubleClick && cam != null && Event.current.type == EventType.MouseDown && Event.current.clickCount == 2) {
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UpdateTargetPosition();
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}
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}
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/// <summary>Update is called once per frame</summary>
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void Update () {
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if (!onlyOnDoubleClick && cam != null) {
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UpdateTargetPosition();
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}
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}
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public void UpdateTargetPosition () {
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Vector3 newPosition = Vector3.zero;
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bool positionFound = false;
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if (use2D) {
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newPosition = cam.ScreenToWorldPoint(Input.mousePosition);
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newPosition.z = 0;
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positionFound = true;
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} else {
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// Fire a ray through the scene at the mouse position and place the target where it hits
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RaycastHit hit;
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if (Physics.Raycast(cam.ScreenPointToRay(Input.mousePosition), out hit, Mathf.Infinity, mask)) {
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newPosition = hit.point;
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positionFound = true;
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}
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}
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if (positionFound && newPosition != target.position) {
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target.position = newPosition;
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if (onlyOnDoubleClick) {
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for (int i = 0; i < ais.Length; i++) {
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if (ais[i] != null) ais[i].SearchPath();
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}
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}
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}
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}
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}
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}
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