private void PerformUndoRedo()
{
undoRedo = false;
if (script.current.Count > 1 && script.subMesh)
{
script.subMesh.triangles = script.RecalculateTriangles(null);
OptimizeMesh(script.subMesh);
return;
}
Mesh sharedMesh = script.GetComponent <MeshFilter>().sharedMesh;
if (!sharedMesh)
{
return;
}
List <int> triangles = new List <int>();
for (int i = 0; i < script.subPoints.Count; i++)
{
triangles.AddRange(script.RecalculateTriangles(script.subPoints[i].list));
}
sharedMesh.triangles = new int[sharedMesh.vertexCount * 3];
script.UpdateMesh(ConvertAllPoints());
sharedMesh.triangles = triangles.ToArray();
if (!placing)
{
script.Combine();
}
}
/// <summary>
/// Custom inspector override for buttons.
/// </summary>
public override void OnInspectorGUI()
{
DrawDefaultInspector();
EditorGUILayout.Space();
//display current count of placed vertices in the active submesh
EditorGUILayout.LabelField("Current Vertices: " + script.current.Count);
//enter placement mode
if (!placing && GUILayout.Button("编辑模式：关闭"))
{
Undo.RegisterCompleteObjectUndo(script, "Edit On");
//if possible, create new submesh
if (CheckSubMesh())
{
GameObject newObj = script.CreateSubMesh();
Undo.RegisterCreatedObjectUndo(newObj, "Edit On");
}
//clear handle selections
selected.Clear();
placing = true;
}
GUI.color = Color.yellow;
//leave placement mode and try to combine submeshes
if (placing && GUILayout.Button("编辑模式:开启"))
{
Undo.RegisterCompleteObjectUndo(script, "Edit Off");
//if possible, combine submeshes
if (CheckCombine())
{
//get all mesh filters
MeshFilter[] meshFilters = script.GetComponentsInChildren <MeshFilter>();
Undo.RecordObject(meshFilters[0], "Edit Off");
//let the script combine them
script.Combine();
for (int i = 1; i < meshFilters.Length; i++)
{
Undo.DestroyObjectImmediate(meshFilters[i].gameObject);
}
}
placing = false;
}
GUI.color = Color.white;
//export mesh to asset and prefab
if (GUILayout.Button("[此步不用操作]保存网格预设（不建议保存|保存场景即可）"))
{
//get gameobject and its mesh filter
GameObject gObj = script.gameObject;
Mesh mesh = gObj.GetComponent <MeshFilter>().sharedMesh;
if (!mesh)
{
Debug.LogWarning("Could not save as prefab, asset does not have a Mesh.");
return;
}
if (AssetDatabase.Contains(mesh))
{
Debug.Log("Mesh asset already exists. Cancelling.");
return;
}
//get the current unix timestamp for a unique naming scheme
var epochStart = new System.DateTime(1970, 1, 1, 0, 0, 0, System.DateTimeKind.Utc);
string timestamp = (System.DateTime.UtcNow - epochStart).TotalSeconds.ToString("F0");
string assetName = "NavMesh_";
//check that the folder does exist
string dir = Path.GetDirectoryName(assetPath);
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
AssetDatabase.ImportAsset(dir);
}
#if UNITY_5_3_OR_NEWER
string sceneName = UnityEngine.SceneManagement.SceneManager.GetActiveScene().name;
#else
string sceneName = Application.loadedLevelName;
#endif
//create the mesh asset at the path specified, with unique name
AssetDatabase.CreateAsset(mesh, assetPath + sceneName + "/" + assetName + timestamp + ".asset");
AssetDatabase.SaveAssets();
//create the prefab of this gameobject at the path specified, with the same name
PrefabUtility.CreatePrefab(assetPath + assetName + timestamp + ".prefab", gObj,
ReplacePrefabOptions.ConnectToPrefab);
//rename instance to prefab name
gObj.name = assetName + timestamp;
}
if (placing)
{
EditorGUILayout.Separator();
EditorGUILayout.LabelField("Hint:", EditorStyles.boldLabel);
EditorGUILayout.TextArea("Click on colliders to place vertices.\n" +
"CTRL + click to start a new submesh.");
}
//================================================
if (GUILayout.Button("将选中瞄点同步高度（以第一个选中的高度为准）"))
{
//don't continue without selected vertices
if (selected.Count == 0)
{
return;
}
Undo.RegisterCompleteObjectUndo(script, "Handle Moved");
Mesh myMesh = script.gameObject.GetComponent <MeshFilter>().sharedMesh;
if (myMesh)
{
Undo.RecordObject(myMesh, "Handle Moved");
}
float standPosY = script.list[selected[0]].y;
for (int i = 0; i < selected.Count; i++)
{
Vector3 curPos = script.list[selected[i]];
script.list[selected[i]] = new Vector3(curPos.x, standPosY, curPos.z);
}
script.UpdateMesh(ConvertAllPoints());
Debug.Log("将选中瞄点同步高度（以第一个选中的高度为准）==>" + standPosY);
}
}
/// <summary>
/// Draw Scene GUI handles, circles and outlines for submesh vertices.
/// <summary>
public void OnSceneGUI()
{
//get world positions of vertices
allPoints = ConvertAllPoints();
//create a ray to get where we clicked in the scene view and pass in mouse position
Ray worldRay = HandleUtility.GUIPointToWorldRay(Event.current.mousePosition);
RaycastHit hitInfo;
//this prevents selecting other objects in the scene
int controlID = GUIUtility.GetControlID(FocusType.Passive);
HandleUtility.AddDefaultControl(controlID);
//find index of closest vertex, if any
dragIndex = FindClosest();
//in the edit mode, ray hit something
if (placing && Physics.Raycast(worldRay, out hitInfo))
{
//the actual hit position
mousePosition = hitInfo.point;
Event e = Event.current;
//place new point if the left mouse button was clicked
if (e.type == EventType.mouseUp && e.button == 0)
{
Undo.RegisterCompleteObjectUndo(script, "Split Mesh");
//get current submesh vertex count
int currentCount = script.current.Count;
//create a new submesh, if control was hold in addition to the mouse click
//or if autoSplit is true and the current count exceeds splitAt
if ((e.control && currentCount >= 3) ||
(script.autoSplit && currentCount >= script.splitAt))
{
GameObject newObj = script.CreateSubMesh();
Undo.RegisterCreatedObjectUndo(newObj, "Split Mesh");
}
//call this method when you've used an event.
//the event's type will be set to EventType.Used,
//causing other GUI elements to ignore it
Event.current.Use();
//add point to existing vertex, if near any
//otherwise just add a new vertex position
if (dragIndex >= 0)
{
script.AddPoint(dragIndex);
}
else
{
script.AddPoint(mousePosition);
}
//invoke new mesh calculation
Undo.RecordObject(script.subMesh, "Split Mesh");
script.CreateMesh();
return;
}
}
//not in edit mode, clicking near vertices will select them and show handles
if (!placing && Event.current.type == EventType.mouseUp && Event.current.button == 0)
{
//select/unselect vertex point
if (dragIndex >= 0)
{
if (!selected.Contains(dragIndex))
{
selected.Add(dragIndex);
}
else
{
selected.Remove(dragIndex);
}
SceneView.RepaintAll();
}
}
//right-clicking anywhere will unselect all vertices
if (!placing && Event.current.type == EventType.mouseUp && Event.current.button == 1)
{
selected.Clear();
}
//draw scene gizmos
DrawSelectedHandles();
DrawPolygonOutline();
//handle undo of vertex modifications (redraw mesh)
if (Event.current.commandName == "UndoRedoPerformed")
{
if (!script.GetComponent <MeshFilter>().sharedMesh)
{
return;
}
script.UpdateMesh(ConvertAllPoints());
return;
}
}
