void OnSceneGUI()
{
#region - GUI Handles and vert manipulation
GUIHandleSizeModifier = Mathf.Abs(SceneView.currentDrawingSceneView.camera.transform.position.z)/100f;
meshPosition = generatedMesh.transform.position;
//Draw the vert handles
for(int i = 0; i < generatedMesh.verts.Length; i++)
{
Vector3 oldPoint = generatedMesh.verts[i];
Handles.color = vertHandleColour;
Vector3 newPoint = Handles.FreeMoveHandle(generatedMesh.verts[i] + meshPosition,
Quaternion.identity,
0.4f * GUIHandleSizeModifier, Vector3.one,
Handles.DotCap);
//if the handle has changed the position of any vert, update that position
if(oldPoint != newPoint)
{
generatedMesh.verts[i] = newPoint - meshPosition;
}
}
//Draw the handle at the centre point of all verts
Handles.color = centerPointColour;
Vector3 centreOffset = Handles.FreeMoveHandle(generatedMesh.verts.GetCenterPointFromCollection() + meshPosition,
Quaternion.identity, 0.6f * GUIHandleSizeModifier, Vector3.one, Handles.DotCap);
//Update the positions of the verts if the centre point has been changed
Vector3 centreOffSetDist = (generatedMesh.verts.GetCenterPointFromCollection() + meshPosition) - centreOffset;
if(centreOffSetDist != Vector3.zero)
{
generatedMesh.transform.position = generatedMesh.transform.position - centreOffSetDist;
}
//Display the delete position of individual verts if selected
Handles.color = deletePositionColour;
if(vertDeletionIndex != -1)
Handles.DrawSolidDisc(generatedMesh.verts[vertDeletionIndex] + meshPosition,
Vector3.forward, 0.6f * GUIHandleSizeModifier);
//Draw the selection rectangle
if(drawSelectionRectangle)
{
Handles.color = Color.green;
Handles.DrawSolidRectangleWithOutline(selectionRectangleVerts,
selectionRectangleFillColour,
selectionRectangleLineColour);
}
//Draw discs on selection of multiple verts
if(indexesOfVertsWithinSelectionRectangle.Count > 0)
{
Handles.color = vertSelectedColour;
for(int i = 0; i < indexesOfVertsWithinSelectionRectangle.Count; i++)
{
Handles.DrawSolidDisc(generatedMesh.verts[indexesOfVertsWithinSelectionRectangle[i]] + meshPosition,
Vector3.forward, 0.7f * GUIHandleSizeModifier);
}
//Draw centre point of selected verts
Handles.color = Color.red;
Vector3 offSet = Handles.FreeMoveHandle(selectedVertsCentrePoint, Quaternion.identity,
0.7f * GUIHandleSizeModifier, Vector3.one, Handles.DotCap);
//if the central handle of the selected points has been moved, move all the individual selected verts
if(offSet != selectedVertsCentrePoint)
{
Vector3 offSetDist = (selectedVertsCentrePoint - offSet);
for(int i = 0; i < indexesOfVertsWithinSelectionRectangle.Count; i++)
{
generatedMesh.verts[indexesOfVertsWithinSelectionRectangle[i]] =
generatedMesh.verts[indexesOfVertsWithinSelectionRectangle[i]] -
new Vector3(offSetDist.x, offSetDist.y, 0);
}
selectedVertsCentrePoint = offSet.RoundVector3To(generatedMesh.deltaLimiter);
}
}
generatedMesh.CalculateVerts();
#endregion
#region - MOUSE AND INPUT EVENTS
int controlID = GUIUtility.GetControlID(FocusType.Passive);
switch(Event.current.GetTypeForControl(controlID))
{
case EventType.MouseDown:
GUIUtility.hotControl = controlID;
//Get the delete position
if (Event.current.button == 1 && Event.current.clickCount == 1)
{
//Destruction of a point. Get the closest point from mouse click using vector2.distance
Ray worldRay = HandleUtility.GUIPointToWorldRay (Event.current.mousePosition);
Vector3 mouseClickPos2D = new Vector3(worldRay.origin.x, worldRay.origin.y, 0f) - meshPosition;
mouseDragRectStartPos = -mouseClickPos2D;
vertDeletionIndex = mouseClickPos2D.IndexOfClosestPointInArray(generatedMesh.verts);
}
//delete the position on double click
if (Event.current.button == 1 && Event.current.clickCount == 2)
{
if(vertDeletionIndex != -1)
{
generatedMesh.DeleteVertPosition(vertDeletionIndex);
vertDeletionIndex = -1;
}
}
//reset the delete position
if (Event.current.button == 0 && Event.current.clickCount == 1)
{
Ray worldRay = HandleUtility.GUIPointToWorldRay (Event.current.mousePosition);
mouseDragRectStartPos = new Vector2(worldRay.origin.x, worldRay.origin.y);
if(vertDeletionIndex != -1)
vertDeletionIndex = -1;
}
//Creation of a new vert postion
if (Event.current.button == 0 && Event.current.clickCount == 2)
{
Ray worldRay = HandleUtility.GUIPointToWorldRay (Event.current.mousePosition);
Vector3 mouseClickPos2D = new Vector3(worldRay.origin.x, worldRay.origin.y, 0f) - meshPosition;
if(!mouseClickPos2D.Equals(Vector3.zero))
if(!generatedMesh.isVertPositionTaken(mouseClickPos2D))
generatedMesh.AddNewVertPosition(mouseClickPos2D);
generatedMesh.ReOrganiseVertIndexes();
generatedMesh.CalculateVerts();
Repaint();
}
//Scroll wheel button is pushed down
if(Event.current.button == 2)
{
GUIUtility.hotControl = 0;
Selection.activeGameObject = null;
}
Event.current.Use();
break;
case EventType.MouseDrag:
if(Event.current.button == 0)
{
//draw the dragwindow
if(GUIUtility.hotControl == controlID)
{
Ray worldRay = HandleUtility.GUIPointToWorldRay (Event.current.mousePosition);
mouseDragRectEndPos = new Vector2(worldRay.origin.x, worldRay.origin.y);
float selectionRectangleWidth = mouseDragRectEndPos.x - mouseDragRectStartPos.x;
float selectionRectangleHeight = mouseDragRectEndPos.y - mouseDragRectStartPos.y;
if(!drawSelectionRectangle)
drawSelectionRectangle = true;
selectionRectangleVerts[0] = new Vector3(mouseDragRectStartPos.x,
mouseDragRectStartPos.y,
0f);
selectionRectangleVerts[1] = new Vector3(mouseDragRectStartPos.x + selectionRectangleWidth,
mouseDragRectStartPos.y,
0f);
selectionRectangleVerts[2] = new Vector3(mouseDragRectStartPos.x + selectionRectangleWidth,
(mouseDragRectStartPos.y + selectionRectangleHeight),
0f);
selectionRectangleVerts[3] = new Vector3(mouseDragRectStartPos.x,
(mouseDragRectStartPos.y + selectionRectangleHeight),
0f);
}
}
Event.current.Use();
break;
case EventType.MouseUp:
if(GUIUtility.hotControl == controlID)
{
GUIUtility.hotControl = 0;
//Selection Rectangle Position
List<Vector2> selectionPositions = new List<Vector2>();
if(drawSelectionRectangle)
{
//Get a collection of all the vert indexes that are within the rectangle valume just drawn
List <int> indexesOfVertsWithinSelectionRectangleNew = new List<int>();
for(int i = 0; i < generatedMesh.verts.Length; i++)
{
if(generatedMesh.verts[i].ToVector2().isPositionWithinRectangleVolume(mouseDragRectStartPos - meshPosition,
mouseDragRectEndPos - meshPosition))
{
indexesOfVertsWithinSelectionRectangleNew.Add(i);
selectionPositions.Add(generatedMesh.verts[i].ToVector2());
}
}
if(indexesOfVertsWithinSelectionRectangle.Count > 0)
indexesOfVertsWithinSelectionRectangle.Clear();
indexesOfVertsWithinSelectionRectangle = indexesOfVertsWithinSelectionRectangleNew;
selectedVertsCentrePoint = selectionPositions.GetCenterPointFromCollection() + meshPosition.ToVector2();
drawSelectionRectangle = false;
}
else
if(indexesOfVertsWithinSelectionRectangle.Count > 0)
indexesOfVertsWithinSelectionRectangle.Clear();
}
Event.current.Use();
break;
//Exit the selection of this gameobject
case EventType.KeyDown:
Event e = Event.current;
if(e.keyCode == KeyCode.Escape)
Selection.activeGameObject = null;
//If multiple verts are currently selected, delete them
if(e.keyCode == KeyCode.Delete)
{
if(indexesOfVertsWithinSelectionRectangle.Count > 0)
{
generatedMesh.DeleteVertPositions(indexesOfVertsWithinSelectionRectangle.ToArray());
indexesOfVertsWithinSelectionRectangle.Clear();
generatedMesh.CalculateVerts();
}
}
GUIUtility.hotControl = 0;
Event.current.Use();
break;
}
#endregion
if(GUI.changed)
EditorUtility.SetDirty(target);
}