private void OnSceneGUI()
{
Event e = Event.current;
if (e == null)
{
return;
}
Ray ray = HandleUtility.GUIPointToWorldRay(e.mousePosition);
if (Physics.Raycast(ray, out RaycastHit hit) && e.type == EventType.MouseDown && e.button == 0)
{
//Add a new waypoint on mouseclick + shift
if (e.shift)
{
if (wps.curSegment == null)
{
return;
}
EditorHelper.BeginUndoGroup("Add Waypoint", wps);
AddWaypoint(hit.point);
//Close Undo Group
Undo.CollapseUndoOperations(Undo.GetCurrentGroup());
}
//Create a segment + add a new waypoint on mouseclick + ctrl
else if (e.control)
{
EditorHelper.BeginUndoGroup("Add Segment", wps);
AddSegment(hit.point);
AddWaypoint(hit.point);
//Close Undo Group
Undo.CollapseUndoOperations(Undo.GetCurrentGroup());
}
//Create an intersection type
else if (e.alt)
{
EditorHelper.BeginUndoGroup("Add Intersection", wps);
AddIntersection(hit.point);
//Close Undo Group
Undo.CollapseUndoOperations(Undo.GetCurrentGroup());
}
}
//Set waypoint system as the selected gameobject in hierarchy
Selection.activeGameObject = wps.gameObject;
//Handle the selected waypoint
if (lastWaypoint != null)
{
//Uses a endless plain for the ray to hit
Plane plane = new Plane(Vector3.up.normalized, lastWaypoint.GetVisualPos());
plane.Raycast(ray, out float dst);
Vector3 hitPoint = ray.GetPoint(dst);
//Reset lastPoint if the mouse button is pressed down the first time
if (e.type == EventType.MouseDown && e.button == 0)
{
lastPoint = hitPoint;
startPosition = lastWaypoint.transform.position;
}
//Move the selected waypoint
if (e.type == EventType.MouseDrag && e.button == 0)
{
Vector3 realDPos = new Vector3(hitPoint.x - lastPoint.x, 0, hitPoint.z - lastPoint.z);
lastWaypoint.transform.position += realDPos;
lastPoint = hitPoint;
}
//Release the selected waypoint
if (e.type == EventType.MouseUp && e.button == 0)
{
Vector3 curPos = lastWaypoint.transform.position;
lastWaypoint.transform.position = startPosition;
Undo.RegisterFullObjectHierarchyUndo(lastWaypoint, "Move Waypoint");
lastWaypoint.transform.position = curPos;
}
//Draw a Sphere
Handles.SphereHandleCap(0, lastWaypoint.GetVisualPos(), Quaternion.identity, wps.waypointSize * 2f, EventType.Repaint);
HandleUtility.AddDefaultControl(GUIUtility.GetControlID(FocusType.Passive));
SceneView.RepaintAll();
}
//Set the current hovering waypoint
if (lastWaypoint == null)
{
lastWaypoint = wps.GetAllWaypoints().FirstOrDefault(i => EditorHelper.SphereHit(i.GetVisualPos(), wps.waypointSize, ray));
}
//Update the current segment to the currently interacting one
if (lastWaypoint != null && e.type == EventType.MouseDown)
{
wps.curSegment = lastWaypoint.segment;
}
//Reset current waypoint
else if (lastWaypoint != null && e.type == EventType.MouseMove)
{
lastWaypoint = null;
}
}