Pathway Component (#371)

* Pathway component

* Pathway component

* Pathway component

* Pathway component

* Pathway component

* Pathway component

* Update PathwayGizmo.cs

* Update PathwayGizmo.cs

* Update PathwayGizmo.cs

* Update PathwayGizmo.cs

* Update PathwayGizmo.cs

* Update PathwayGizmo.cs

* Pathway component

* Pathway component

* Pathway component

* Pathway component

* Update PathwayEditor.cs

* Pathway component

* Update PathwayEditor.cs

* Pathway component

* Update PathwayGismos.cs

* Pathway component

* Update PathwayEditor.cs

* Update PathwayEditor.cs

* Pathway component

* Pathway component

* Update PathwayEditor.cs

* Update PathwayEditor.cs

* Pathway component

Not doing polls at this time.

* Update PathwayGismos.cs

* Update PathwayGismos.cs

* Pathway component

* Update PathwayEditor.cs

* Update PathwayEditor.cs

* Pathway component

* Pathway component

* Pathway comp...

UOP1_Project/Assets/Prefabs/Pathway.meta

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UOP1_Project/Assets/Prefabs/Pathway/Pathway.prefab

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UOP1_Project/Assets/Scripts/Editor/Pathway/PathwayEditor.cs

+using UnityEngine;
+using UnityEditor;
+using UnityEditorInternal;
+
+
+[CustomEditor(typeof(Pathway))]
+public class PathwayEditor : Editor
+{
+	private ReorderableList _reorderableList;
+	private Pathway _pathway;
+	private PathwayHandles _pathwayHandles;
+	
+
+	public void OnSceneGUI()
+	{
+		_pathwayHandles.DispalyHandles();
+	}
+
+	public override void OnInspectorGUI()
+	{
+		DrawDefaultInspector();
+		serializedObject.Update();
+		_reorderableList.DoLayoutList();
+		serializedObject.ApplyModifiedProperties();
+	}
+
+	private void OnEnable()
+	{
+		Undo.undoRedoPerformed += DoUndo;
+		_reorderableList = new ReorderableList(serializedObject, serializedObject.FindProperty("Waypoints"), true, true, true, true);
+		_reorderableList.drawHeaderCallback += DrawHeader;
+		_reorderableList.drawElementCallback += DrawElement;
+		_reorderableList.onAddCallback += AddItem;
+		_reorderableList.onRemoveCallback += RemoveItem;
+		_reorderableList.onSelectCallback += SelectItem;
+		_reorderableList.onChangedCallback += ListModified;
+		_pathway = (target as Pathway);
+		_pathwayHandles = new PathwayHandles(_pathway);
+	}
+
+	private void OnDisable()
+	{
+		Undo.undoRedoPerformed -= DoUndo;
+		_reorderableList.drawHeaderCallback -= DrawHeader;
+		_reorderableList.drawElementCallback -= DrawElement;
+		_reorderableList.onAddCallback -= AddItem;
+		_reorderableList.onRemoveCallback -= RemoveItem;
+		_reorderableList.onSelectCallback -= SelectItem;
+		_reorderableList.onChangedCallback -= ListModified;
+	}
+
+	private void DrawHeader(Rect rect)
+	{
+		GUI.Label(rect, Pathway.TITLE_LABEL);
+	}
+
+	private void DrawElement(Rect rect, int index, bool active, bool focused)
+	{
+		SerializedProperty item = _reorderableList.serializedProperty.GetArrayElementAtIndex(index);
+		item.vector3Value = EditorGUI.Vector3Field(rect, Pathway.FIELD_LABEL + index, item.vector3Value);
+	}
+
+	private void AddItem(ReorderableList list)
+	{
+		int index = list.index;
+
+		if (index > -1 && list.serializedProperty.arraySize >= 1)
+		{
+			list.serializedProperty.InsertArrayElementAtIndex(index + 1);
+			Vector3 previous = list.serializedProperty.GetArrayElementAtIndex(index).vector3Value;
+			list.serializedProperty.GetArrayElementAtIndex(index + 1).vector3Value = new Vector3(previous.x + 2, previous.y, previous.z + 2);
+		}
+		else
+		{
+			list.serializedProperty.InsertArrayElementAtIndex(list.serializedProperty.arraySize);
+			Vector3 previous = _pathway.transform.position;
+			list.serializedProperty.GetArrayElementAtIndex(list.serializedProperty.arraySize - 1).vector3Value = new Vector3(previous.x + 2, previous.y, previous.z + 2);
+		}
+
+		list.index++;
+	}
+
+	private void RemoveItem(ReorderableList list)
+	{
+		int index = list.index;
+
+		list.serializedProperty.DeleteArrayElementAtIndex(index);
+
+		if (list.index == list.serializedProperty.arraySize)
+		{
+			list.index--;
+		}
+
+	}
+
+	private void SelectItem(ReorderableList list)
+	{
+		InternalEditorUtility.RepaintAllViews();
+	}
+
+	private void ListModified(ReorderableList list)
+	{
+		list.serializedProperty.serializedObject.ApplyModifiedProperties();
+	}
+
+	private void DoUndo()
+	{
+		serializedObject.UpdateIfRequiredOrScript();
+
+		if (_reorderableList.index >= _reorderableList.serializedProperty.arraySize )
+		{
+			_reorderableList.index = _reorderableList.serializedProperty.arraySize-1;
+		}
+	}
+
+}

UOP1_Project/Assets/Scripts/Editor/Pathway/PathwayEditor.cs.meta

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UOP1_Project/Assets/Scripts/Editor/Pathway/PathwayGizmos.cs

+using UnityEngine;
+using UnityEditor;
+using System.Collections.Generic;
+
+
+public class PathwayGizmos 
+{
+	[DrawGizmo(GizmoType.Selected)]
+	private static void DrawGizmosSelected(Pathway pathway, GizmoType gizmoType)
+	{
+		
+		DrawHandlesPath(pathway);
+	}
+
+	private static void DrawElements(Pathway pathway, List<Vector3> path, int index)
+	{
+		GUIStyle style = new GUIStyle();
+		Vector3 textHeight =  Vector3.up;
+
+		style.normal.textColor = pathway.TextColor;
+		style.fontSize = pathway.TextSize;
+
+		Handles.Label(path[index] + textHeight, index.ToString(), style);
+	}
+
+	private static void DrawHandlesPath(Pathway pathway)
+	{
+		if (pathway.Waypoints.Count != 0) {
+			DrawElements(pathway, pathway.Waypoints, 0);
+		}
+
+		for (int i = 0; i < pathway.Waypoints.Count; i++)
+		{
+			if (i != 0 && pathway.Waypoints.Count > 1)
+			{
+				DrawElements(pathway, pathway.Waypoints, i);
+				using (new Handles.DrawingScope(pathway.LineColor))
+				{
+					Handles.DrawDottedLine(pathway.Waypoints[i - 1], pathway.Waypoints[i], 2);
+				}
+				
+			}
+		}
+
+		if (pathway.Waypoints.Count > 2)
+		{
+			using (new Handles.DrawingScope(pathway.LineColor))
+			{
+				Handles.DrawDottedLine(pathway.Waypoints[0], pathway.Waypoints[pathway.Waypoints.Count - 1], 2);
+			}
+		}
+
+	}
+
+}

UOP1_Project/Assets/Scripts/Editor/Pathway/PathwayGizmos.cs.meta

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UOP1_Project/Assets/Scripts/Editor/Pathway/PathwayHandles.cs

+using UnityEngine;
+using UnityEditor;
+
+
+public class PathwayHandles 
+{
+	private Pathway _pathway;
+
+	public PathwayHandles(Pathway pathway)
+	{
+		_pathway = pathway;
+	}
+
+	public void DispalyHandles()
+	{
+		EditorGUI.BeginChangeCheck();
+
+		for (int i = 0; i < _pathway.Waypoints.Count; i++)
+		{
+			_pathway.Waypoints[i] = Handles.PositionHandle(_pathway.Waypoints[i], Quaternion.identity);
+		}
+	}
+
+}

UOP1_Project/Assets/Scripts/Editor/Pathway/PathwayHandles.cs.meta

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UOP1_Project/Assets/Scripts/Pathway/Pathway.cs

+using System.Collections.Generic;
+using UnityEngine;
+
+
+public class Pathway : MonoBehaviour
+{
+	[HideInInspector]
+	public List<Vector3> Waypoints;
+
+#if UNITY_EDITOR
+
+	[SerializeField]
+	private Color _lineColor = Color.black;
+
+	[SerializeField, Range(0, 100)]
+	private int _textSize = 10;
+
+	[SerializeField]
+	private Color _textColor = Color.white;
+
+	public const string FIELD_LABEL = "Point ";
+	public const string TITLE_LABEL = "Waypoints";
+
+	public Color LineColor { get => _lineColor; }
+	public Color TextColor { get => _textColor; }
+	public int TextSize { get => _textSize; }
+	
+
+#endif
+
+}

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