60 lines
1.3 KiB
C#
60 lines
1.3 KiB
C#
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using UnityEngine;
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using UnityEngine.UI;
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using System.Collections.Generic;
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namespace Pathfinding.Examples.RTS {
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[HelpURL("https://arongranberg.com/astar/documentation/stable/rtsworldspaceui.html")]
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public class RTSWorldSpaceUI : VersionedMonoBehaviour {
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public Camera worldCamera;
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List<Item> items = new List<Item>();
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public class Item {
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public RectTransform transform;
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public Transform tracking;
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public Vector3 worldOffset;
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public Vector2 screenOffset;
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public Item (Transform tracking) {
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this.tracking = tracking;
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}
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public virtual void SetUIRoot (GameObject root) {
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transform = root.GetComponent<RectTransform>();
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}
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public virtual bool valid {
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get {
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return tracking != null;
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}
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}
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public virtual void Update (Camera cam) {
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var p = cam.WorldToScreenPoint(tracking.position + worldOffset) + (Vector3)screenOffset;
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p.z = 0;
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transform.anchoredPosition = p;
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}
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}
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public void Add (Item item, GameObject prefab) {
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var go = GameObject.Instantiate(prefab);
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go.transform.SetParent(transform, false);
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item.SetUIRoot(go);
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items.Add(item);
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}
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void LateUpdate () {
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for (int i = items.Count - 1; i >= 0; i--) {
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if (items[i].valid) {
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items[i].Update(worldCamera);
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} else {
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GameObject.Destroy(items[i].transform.gameObject);
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items.RemoveAt(i);
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}
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}
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}
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}
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}
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