private void MergeWithCollidingFaces()
{
//Collecting all moved faces and static faces and remove faces if they overlap.
var facesToRemove = new List <int>();
Manifold manifold = Extrudable._manifold;
int noFaces = manifold.NumberOfFaces();
var vertexIds = new int[manifold.NumberOfVertices()];
var halfedgeIds = new int[manifold.NumberOfHalfEdges()];
int[] allFaces = new int[noFaces];
Extrudable._manifold.GetHMeshIds(vertexIds, halfedgeIds, allFaces);
int[] staticFaces = allFaces;
HashSet <int> facesBeingExtruded = new HashSet <int>();
//collect all neighbouring faces of extruded faces, theses faces are the one connecting the vertices of the old face to the face being moved.
foreach (int face0 in extrudingFaces)
{
foreach (int face1 in Extrudable._manifold.GetAdjacentFaceIdsAndEdgeCenters(face0).faceId)
{
facesBeingExtruded.Add(face1);
}
//the moved face itself
facesBeingExtruded.Add(face0);
}
foreach (int faceMoving in facesBeingExtruded)
{
foreach (int faceStatic in staticFaces)
{
if (faceMoving == faceStatic)
{
break;
}
if (facingFaces(faceMoving, faceStatic)) //initial cheap check
{
var verticesFromFaceMoving = Extrudable._manifold.GetVertexPositionsFromFace(faceMoving);
var verticesFromFaceStatic = Extrudable._manifold.GetVertexPositionsFromFace(faceStatic);
if (verticesFromFaceMoving.Count() == verticesFromFaceStatic.Count())
{
var matches = faceBridgingVertexAssignment(verticesFromFaceMoving, verticesFromFaceStatic);
if (facingFaces(matches, faceMoving, verticesFromFaceMoving, faceStatic, verticesFromFaceStatic))
{
if (matches.Length == 6)
{
facesToRemove.Add(faceMoving);
facesToRemove.Add(faceStatic);
}
else if (matches.Length == 8)
{
facesToRemove.Add(faceMoving);
facesToRemove.Add(faceStatic);
}
}
}
}
}
}
//remove facing faces and stich everything together
foreach (int face in facesToRemove)
{
Extrudable._manifold.RemoveFace(face);
}
Extrudable._manifold.StitchMesh(0.05);
}
public void UpdateControls()
{
Manifold manifold = Extrudable._manifold;
var faceIds = new int[manifold.NumberOfFaces()];
var vertexIds = new int[manifold.NumberOfVertices()];
var halfedgeIds = new int[manifold.NumberOfHalfEdges()];
manifold.GetHMeshIds(vertexIds, halfedgeIds, faceIds);
// update face handles
foreach (var faceHandleController in _faceHandles)
{
var handleFace = faceHandleController.Value.AssociatedFaceID;
if (!faceHandleController.Value.IsDragged)
{
var center = manifold.GetCenterTriangulated(handleFace);
//Use average of edgecenters if we have more than 4 edges.
var temp = manifold.GetAdjacentFaceIdsAndEdgeCenters(handleFace);
if (temp.edgeCenter.Length > 4)
{
Vector3 cent = new Vector3();
foreach (Vector3 v in temp.edgeCenter)
{
cent[0] += v[0];
cent[1] += v[1];
cent[2] += v[2];
}
cent[0] /= temp.edgeCenter.Length;
cent[1] /= temp.edgeCenter.Length;
cent[2] /= temp.edgeCenter.Length;
center = cent;
}
// Rotate the handle to look in the opposite direction of face's normal
var normal = manifold.GetFaceNormal(handleFace);
var edgeNormal = manifold.GetFirstEdgeDirection(handleFace);
faceHandleController.Value.UpdatePositionAndRotation(center, normal, edgeNormal);
faceHandleController.Value.gameObject.SetActive(true);
}
var adjacentFaces = manifold.GetAdjacentFaceIdsAndEdgeCenters(handleFace);
for (int j = 0; j < adjacentFaces.edgeId.Length; j++)
{
EdgeHandleController latch;
if (_edgeHandles.TryGetValue(adjacentFaces.edgeId[j], out latch))
{
var otherFace = latch.GetOtherFace(handleFace);
var edgeCenter = adjacentFaces.edgeCenter[j];
var normal = manifold.GetFaceNormal(handleFace);
var adjacentFaceNormal = manifold.GetFaceNormal(otherFace);
latch.UpdatePositionAndRotation(edgeCenter, adjacentFaces.edgeNormals[j],
adjacentFaceNormal + normal);
latch.gameObject.SetActive(true);
}
}
}
for (int i = 0; i < faceIds.Length; i++)
{
int id = faceIds[i];
FaceHandleController visitedHandleController = null;
_faceHandles.TryGetValue(id, out visitedHandleController);
var newHandle = visitedHandleController != null
? visitedHandleController
: InstantiateFaceHandle(manifold, id);
InstantiateLatches(manifold, newHandle);
}
foreach (var vertexHandleController in _vertexHandles)
{
if (!vertexHandleController.Value.IsDragged)
{
Vector3 vertexPosition = manifold.VertexPosition(vertexHandleController.Key);
vertexHandleController.Value.transform.localPosition = vertexPosition;
Vector3 vertexNormal = manifold.GetVertexNormal(vertexHandleController.Key);
//Debug.Log("VertexHandleNormal: " + vertexNormal);
Quaternion handleRotation = Quaternion.LookRotation(-vertexNormal);
vertexHandleController.Value.transform.localRotation = handleRotation;
}
vertexHandleController.Value.gameObject.SetActive(true);
}
for (int i = 0; i < vertexIds.Length; i++)
{
int id = vertexIds[i];
VertexHandleController vertexHandle = null;
_vertexHandles.TryGetValue(id, out vertexHandle);
if (!manifold.IsVertexInUse(id) || vertexHandle != null)
{
continue;
}
InstantiateVertexHandle(manifold, id);
}
//update sizes
foreach (var faceHandleController in _faceHandles.Values)
{
faceHandleController.UpdateHandleSize();
}
foreach (var edgeHandleController in _edgeHandles.Values)
{
edgeHandleController.UpdateHandleSize();
}
foreach (var vertexHandleController in _vertexHandles.Values)
{
vertexHandleController.UpdateHandleSize();
}
}