public void GrowSelection(FaceSelectionState faceSelectionState)
{
var selectedFaceIndecies = new List <ushort>();
var indexBuffer = faceSelectionState.RenderObject.Geometry.GetIndexBuffer();
foreach (var face in faceSelectionState.SelectedFaces)
{
selectedFaceIndecies.Add(indexBuffer[face]);
selectedFaceIndecies.Add(indexBuffer[face + 1]);
selectedFaceIndecies.Add(indexBuffer[face + 2]);
}
var meshService = new MeshSplitterService();
var newSelection = meshService.GrowSelection(faceSelectionState.RenderObject.Geometry, selectedFaceIndecies);
var selectCmd = new FaceSelectionCommand(newSelection);
_commandManager.ExecuteCommand(selectCmd);
}
void SelectFromRectangle(Rectangle screenRect, bool isSelectionModification, bool removeSelection)
{
var unprojectedSelectionRect = _camera.UnprojectRectangle(screenRect);
var currentState = _selectionManager.GetState();
if (currentState.Mode == GeometrySelectionMode.Face && currentState is FaceSelectionState faceState)
{
if (GeometryIntersection.IntersectFaces(unprojectedSelectionRect, faceState.RenderObject.Geometry, faceState.RenderObject.ModelMatrix, out var faces))
{
var faceSelectionCommand = new FaceSelectionCommand(faces, isSelectionModification, removeSelection);
_commandManager.ExecuteCommand(faceSelectionCommand);
return;
}
}
else if (currentState.Mode == GeometrySelectionMode.Vertex && currentState is VertexSelectionState vertexState)
{
if (GeometryIntersection.IntersectVertices(unprojectedSelectionRect, vertexState.RenderObject.Geometry, vertexState.RenderObject.ModelMatrix, out var vertices))
{
var vertexSelectionCommand = new VertexSelectionCommand(vertices, isSelectionModification, removeSelection);
_commandManager.ExecuteCommand(vertexSelectionCommand);
return;
}
}
var selectedObjects = _sceneManger.SelectObjects(unprojectedSelectionRect);
if (selectedObjects.Count() == 0 && isSelectionModification == false)
{
// Only clear selection if we are not in geometry mode and the selection count is not empty
if (currentState.Mode != GeometrySelectionMode.Object || currentState.SelectionCount() != 0)
{
var selectionCommand = new ObjectSelectionCommand(new List <ISelectable>(), false, false);
_commandManager.ExecuteCommand(selectionCommand);
}
}
else if (selectedObjects != null)
{
var selectionCommand = new ObjectSelectionCommand(selectedObjects, isSelectionModification, removeSelection);
_commandManager.ExecuteCommand(selectionCommand);
}
}
void SelectFromPoint(Vector2 mousePosition, bool isSelectionModification, bool removeSelection)
{
var ray = _camera.CreateCameraRay(mousePosition);
var currentState = _selectionManager.GetState();
if (currentState.Mode == GeometrySelectionMode.Face)
{
if (currentState.Mode == GeometrySelectionMode.Face)
{
var faceState = currentState as FaceSelectionState;
if (GeometryIntersection.IntersectFace(ray, faceState.RenderObject.Geometry, faceState.RenderObject.ModelMatrix, out var selectedFace) != null)
{
FaceSelectionCommand faceSelectionCommand = new FaceSelectionCommand(selectedFace.Value, isSelectionModification, removeSelection);
_commandManager.ExecuteCommand(faceSelectionCommand);
return;
}
}
}
// Pick object
var selectedObject = _sceneManger.SelectObject(ray);
if (selectedObject == null && isSelectionModification == false)
{
// Only clear selection if we are not in geometry mode and the selection count is not empty
if (currentState.Mode != GeometrySelectionMode.Object || currentState.SelectionCount() != 0)
{
var selectionCommand = new ObjectSelectionCommand(new List <ISelectable>(), false, false);
_commandManager.ExecuteCommand(selectionCommand);
}
}
else if (selectedObject != null)
{
var selectionCommand = new ObjectSelectionCommand(selectedObject, isSelectionModification, removeSelection);
_commandManager.ExecuteCommand(selectionCommand);
}
}