bool SetBoundary()
{
{
m_Mesh2D.DeleteInit();
int numBoundary = m_ArrayMeshBoundary.Count;
for (int i = 0; i < numBoundary; i++)
{
if (m_ArrayMeshBoundary[i].FlagHole)
{
m_Mesh2D.SetBoundary(m_ArrayMeshBoundary[i]);
}
}
// Elimina eventuali spigoli isolati
for (int i = 0; i < m_Mesh2D.ArrayWEdges.Count; i++)
{
AM_Edge pedge = m_Mesh2D.ArrayWEdges[i].Edge();
if (pedge.CcwFace() == null && pedge.CwFace() == null)
{
m_Mesh2D.DeleteEdge(pedge);
}
}
}
return(true);
}
AM_Edge Locate(Point2d x)
{
AM_Edge e = m_StartingEdge;
int actualEdge = 0;
int numEdge = m_ArrayWEdges.Count;
while (actualEdge++ <= numEdge)
{
if (x == e.OrgCoord() || x == e.DestCoord())
{
return(e);
}
else if (AM_Edge.RightOf(x, e))
{
e = e.Symm();
}
else if (!AM_Edge.RightOf(x, e.Next))
{
e = e.Next;
}
else if (!AM_Edge.RightOf(x, e.CcwEdge().Symm()))
{
e = e.CcwEdge().Symm();
}
else
{
return(e);
}
}
return(null);
}
bool OnEdge(Point2d p, AM_Edge edge)
{
double t1, t2, t3;
double EPS = 1e-6;
Point2d org = edge.OrgCoord();
t1 = (p - org).Length;
t2 = (p - edge.DestCoord()).Length;
if (t1 < EPS || t2 < EPS)
{
return(true);
}
Vector2d vector = org - edge.DestCoord();
t3 = vector.Length;
if (t1 > t3 || t2 > t3)
{
return(false);
}
double a = vector.Y / t3;
double b = -vector.X / t3;
double c = -(a * org.X + b * org.Y);
return(Math.Abs((a * p.X + b * p.Y + c)) < EPS);
}
private void AddTransitionVertexes(AM_Vertex v, List <int> transitionVts)
{
if ((v.Flag & 0x02) == 0)
{
v.Flag |= 0x02;
transitionVts.Add(v.Index);
AM_Edge start_edge = v.Edge;
AM_Edge edge = start_edge.Next;
while (edge != start_edge)
{
if ((edge.Flag & 0x04) == 0)
{
edge.Flag |= 0x04;
var dest = edge.Destination();
if ((dest.Flag & 0x01) == 0)
{
AddTransitionVertexes(dest, transitionVts);
}
}
edge = edge.Next;
}
}
}
bool CheckSwapEdge(AM_Edge pedge)
{
// Controlla l'ammissibilità dello swap.
// Uno spigolo può essere scambiato all'interno di un quadrangolo
// se quest'ultimo è convesso.
Point2d p1 = pedge.CcwEdge().DestCoord();
Point2d p2 = pedge.OrgCoord();
Point2d p3 = pedge.DestCoord();
Point2d p4 = pedge.Symm().CcwEdge().DestCoord();
Vector2d v1 = p4 - p2;
Vector2d v2 = p1 - p2;
v1.Unitize();
v2.Unitize();
if ((v1.X * v2.Y - v2.X * v1.Y) < AM_Util.FLT_EPSILON)
{
return(false);
}
Vector2d v3 = p1 - p3;
Vector2d v4 = p4 - p3;
v3.Unitize();
v4.Unitize();
if ((v3.X * v4.Y - v4.X * v3.Y) < AM_Util.FLT_EPSILON)
{
return(false);
}
return(true);
}
internal AM_Coedge(AM_Vertex vtx_org, AM_Vertex vtx_dest)
{
m_Edges[0] = new AM_Edge(this, 0);
m_Edges[1] = new AM_Edge(this, 1);
m_Edges[0].Vertex = vtx_org;
m_Edges[1].Vertex = vtx_dest;
}
internal static void SwapEdge(AM_Edge pedge)
{
Debug.Assert(pedge.CcwFace().NumEdges == 3);
Debug.Assert(pedge.CwFace().NumEdges == 3);
AM_Edge pstart = pedge;
do
{
Point2d p1 = pedge.CcwEdge().DestCoord();
Point2d p2 = pedge.OrgCoord();
Point2d p3 = pedge.DestCoord();
Point2d p4 = pedge.Symm().CcwEdge().DestCoord();
//int n1 = pedge.CcwEdge().Destination().Index;
//int n2 = pedge.Origin().Index;
//int n3 = pedge.Destination().Index;
//int n4 = pedge.Symm().CcwEdge().Destination().Index;
//int v1 = pedge.CcwEdge().Symm().m_nVertex;
//int v2 = pedge.m_nVertex;
//int v3 = pedge.Symm().m_nVertex;
//int v4 = pedge.Symm().CcwEdge().Symm().m_nVertex;
AM_Edge poldPrev = pedge.Prev;
AM_Edge poldNext = pedge.Next;
AM_Edge pnewNext = pedge.Prev.Symm();
AM_Edge pnewPrev = pnewNext.Prev;
AM_Face poldFace = pedge.Face;
pedge.Origin().Edge = poldNext;
pedge.Vertex = pnewNext.Vertex; // Ripristina l'origine...
pedge.Origin().Edge = pedge; // e aggiorna il suo puntatore
// ripristina i collegamenti corretti
poldPrev.Next = poldNext;
poldNext.Prev = poldPrev;
pnewPrev.Next = pedge;
pnewNext.Prev = pedge;
pedge.Next = pnewNext;
pedge.Prev = pnewPrev;
Debug.Assert(pedge.Origin() != pedge.Destination());
// parte dallo spigolo che definisce la faccia sinistra
// e che è precedente in senso antiorario
pnewNext = poldNext.Symm();
for (int i = 0; i < 3; i++)
{
pnewNext.Face = poldFace;
poldFace[i] = pnewNext;
pnewNext = pnewNext.CcwEdge();
}
pedge = pedge.Symm();
} while (pstart != pedge);
}
void Init(Point3d a, Point3d b, Point3d c)
{
Debug.Assert(m_ArrayFaces.Count == 0);
AM_Face face = new AM_Face();
Point3d[] coord = { a, b, c };
AddFace(face, coord);
m_StartingEdge = face[0];
}
bool DeleteVertex(AM_Vertex vertex, bool bdelete = false)
{
// Cancella un vertice dall'array globale dei vertici
if (vertex == null || vertex.Index < 0)
{
Debug.Assert(false);
return(false);
}
int nindex = vertex.Index;
int nlast = m_ArrayVertexes.Count - 1;
// La cancellazione dall'array globale degli vertici avviene
// spostando l'ultimo vertice dell'array al posto di quello da cancellare
m_ArrayVertexes[nindex] = m_ArrayVertexes[nlast];
m_ArrayVertexes[nindex].Index = nindex;
m_ArrayVertexes.RemoveAt(nlast);
if (nlast != nindex)
{
// è necessario aggiornare opportunamente l'anello del vertice
// aggiornando il dato membro m_nVertex;
AM_Edge pstartEdge = m_ArrayVertexes[nindex].Edge;
AM_Edge edge = pstartEdge;
if (pstartEdge == null)
{
Debug.Assert(false);
return(true);
}
do
{
edge.Vertex = m_ArrayVertexes[nindex];
edge = edge.Next;
} while (edge != pstartEdge);
if (bdelete)
{
//delete vertex;
vertex.Edge = null;
vertex.Index = -1;
}
else
{
vertex.Edge = null;
vertex.Index = -1;
}
}
return(true);
}
internal AM_Edge FindEdge(AM_Vertex pVertex2)
{
AM_Edge pNext = m_Edge;
do
{
if (pNext.Destination() == pVertex2)
{
return(pNext);
}
pNext = pNext.Next;
} while (pNext != m_Edge);
return(null);
}
void RelaxMesh()
{
// Esegue la procedura di "Mesh Relaxation"
bool bPrev = m_bFlagClassific;
m_bFlagClassific = false;
for (int DiffDegree = 3; DiffDegree >= 2; DiffDegree--)
{
for (int i = 0; i < m_ArrayWEdges.Count; i++)
{
AM_Edge edge = m_ArrayWEdges[i].Edge();
if (edge.CcwFace() != null && edge.CwFace() != null)
{
AM_Vertex [] Vertex = { edge.Origin(),
edge.Destination(),
edge.Next.Destination(),
edge.Prev.Destination(), };
double [] degree = { 0, 0, 0, 0 };
for (int j = 0; j < degree.Length; j++)
{
degree[j] = Vertex[j].Degree();
}
double R = 0;
for (int j = 0; j < 4; j++)
{
R += (6 - degree[j]) * (6 - degree[j]);
}
// aggiorna il grado con l'ipotesi do swap
degree[0] -= 1;
degree[1] -= 1;
degree[2] += 1;
degree[3] += 1;
double R1 = 0;
for (int j = 0; j < 4; j++)
{
R1 += (6 - degree[j]) * (6 - degree[j]);
}
if (R - R1 >= DiffDegree)
{
Swap(edge);
}
}
}
}
m_bFlagClassific = bPrev;
}
internal double Degree(bool bSimple = false)
{
int degree = 0;
if (m_Edge == null)
{
Debug.Assert(false);
return(0);
}
// Il "grado" di un vertice è definito come il numero di vertici
// ad esso conneesso.
if (bSimple)
{
// Se bSimple = true si conta semplicemente il numero
// di spigoli connessi
AM_Edge pNext = m_Edge;
do
{
degree++;
pNext = pNext.Next;
} while (pNext != m_Edge);
return(degree);
}
double angle = 0;
{
AM_Edge pNext = m_Edge;
do
{
degree++;
if (pNext.CcwFace() != null)
{
Vector2d v0 = (pNext.DestCoord() - m_Coord);
Vector2d v1 = (pNext.Next.DestCoord() - m_Coord);
v0.Unitize();
v1.Unitize();
double cos_ang = Vector2d.Multiply(v0, v1);
angle += Math.Acos(cos_ang);
}
pNext = pNext.Next;
} while (pNext != m_Edge);
}
return(degree * 2 * Math.PI / angle);
}
bool RefineMeshStep()
{
AM_Face face = null;
Point2d innerPoint;
AM_Face triangleContaining = null;
face = FindMaxActive();
if (face == null)
{
return(false);
}
m_StartingEdge = face.GetStartingEdge();
innerPoint = face.InsertPoint(m_pSpaceFunction);
//localizzo il triangolo che contiene il punto per fare il test di spaziatura.
AM_Edge e = Locate(innerPoint);
triangleContaining = e != null? (AM_Edge.RightOf(innerPoint, e) ? e.CwFace() : e.CcwFace())
: null;
if (triangleContaining == null)
{
DeleteActiveFace(face);
}
else
{
//innerPoint.Z = triangleContaining.SpaceFunction(innerPoint, m_pSpaceFunction);
double s = triangleContaining.SpaceFunction(innerPoint, m_pSpaceFunction);
if (triangleContaining.SpacingTest(innerPoint, m_pSpaceFunction))
{
AM_Vertex vertex;
if (!InsertPoint(innerPoint, s, out vertex))
{
DeleteActiveFace(face);
}
}
else
{
DeleteActiveFace(face);
}
}
return(true);
}
internal AM_Edge GetGenEdge(int i)
{
int numVertex = GetNumGenVertex();
if (i >= numVertex)
{
Debug.Assert(false);
return(null);
}
AM_Vertex pV1 = m_ArrayVertex[i];
AM_Vertex pV2 = m_ArrayVertex[(i + 1) % numVertex];
AM_Edge pEdge = pV1.FindEdge(pV2);;
return(pEdge);
}
internal bool GetCoordZ(Point2d p, ref double Z)
{
// Localizza uno spigolo vicino
AM_Edge edge = Locate(p);
if (edge == null)
{
return(false);
}
AM_Face face = null;
if (AM_Edge.LeftOf(p, edge))
{
face = edge.CcwFace();
}
else
{
face = edge.CwFace();
}
Z = 0;
if (face == null)
{
return(false);
}
Point2d p0 = face.Vertex(0).Coord;
Point2d p1 = face.Vertex(1).Coord;
Point2d p2 = face.Vertex(2).Coord;
double det = AM_Util.TriArea(p0, p1, p2);
Debug.Assert(det != 00);
double alfa = AM_Util.TriArea(p0, p, p2) / det;
double beta = AM_Util.TriArea(p0, p1, p) / det;
double f0 = face.Vertex(0).Z;
double f1 = face.Vertex(1).Z;
double f2 = face.Vertex(2).Z;
Z = f0 + alfa * (f1 - f0) + beta * (f2 - f0);
return(true);
}
AM_Edge FindEdge(AM_Vertex org, AM_Vertex dest)
{
AM_Edge pstart = org.Edge;
if (pstart != null)
{
AM_Edge pnext = pstart;
do
{
if (pnext.Destination() == dest)
{
return(pnext); // lo spigolo esiste già
}
pnext = pnext.Next;
} while (pnext != pstart);
}
return(null);
}
internal int NumDegree()
{
if (m_Edge == null)
{
return(0);
}
int degree = 0;
AM_Edge pNext = m_Edge;
do
{
degree++;
pNext = pNext.Next;
} while (pNext != m_Edge);
return(degree);
}
internal bool CheckWEdge()
{
for (int i = 0; i < m_ArrayWEdges.Count; i++)
{
AM_Edge edge = m_ArrayWEdges[i].Edge();
Debug.Assert(edge.Origin() != edge.Destination());
}
for (int i = 0; i < m_ArrayFaces.Count; i++)
{
AM_Face edge = m_ArrayFaces[i];
double area = AM_Util.TriArea(edge[0].OrgCoord(),
edge[1].OrgCoord(),
edge[2].OrgCoord());
Debug.Assert(area > 0);
}
return(true);
}
bool BelongToBorder(AM_Vertex v)
{
AM_Edge start_edge = v.Edge;
if (start_edge != null)
{
AM_Edge edge = start_edge.Next;
while (edge != start_edge)
{
if (edge.CcwFace() == null || edge.CwFace() == null)
{
return(true);
}
edge = edge.Next;
}
}
return(false);
}
AM_Edge AddEdge(AM_Vertex org, AM_Vertex dest)
{
AM_Coedge pwEdge = new AM_Coedge(org, dest);
if (pwEdge == null)
{
Debug.Assert(false);
//throw -1;
}
pwEdge.Index = m_ArrayWEdges.Count;
m_ArrayWEdges.Add(pwEdge);
AM_Edge edge = pwEdge.Edge();
//edge.m_pArrayVertex = &m_ArrayVertexes;
//edge.Symm().m_pArrayVertex = &m_ArrayVertexes;
return(edge);
}
void Swap(AM_Edge edge)
{
AM_Face face1 = (AM_Face)edge.CcwFace();
AM_Face face2 = (AM_Face)edge.CwFace();
if (face1 == null || face2 == null)
{
if (face1 != null && face1.FaceType == AM_Face.EFaceType.FT_ACTIVE)
{
DeleteActiveFace(face1);
}
if (face2 != null && face2.FaceType == AM_Face.EFaceType.FT_ACTIVE)
{
DeleteActiveFace(face2);
}
return;
}
Debug.Assert(edge.CwFace() != null);
Debug.Assert(edge.CcwFace() != null);
if (face1.FaceType == AM_Face.EFaceType.FT_ACTIVE)
{
DeleteActiveFace(face1);
}
if (face2.FaceType == AM_Face.EFaceType.FT_ACTIVE)
{
DeleteActiveFace(face2);
}
AM_Face.SwapEdge(edge);
if (m_bFlagClassific)
{
face1.SetTriangleParameter(m_pSpaceFunction);
face2.SetTriangleParameter(m_pSpaceFunction);
Classific(face1);
Classific(face2);
}
}
internal bool InnerTest(Point2d p)
{
Point2d x = p;
// Per appartenere alla faccia devono essere tutte a sinistra dello spigolo
for (int i = 0; i < 3; i++)
{
AM_Edge e = m_pEdges[i];
if (x.EpsilonEquals(e.OrgCoord(), AM_Util.FLT_EPSILON))
{
return(true);
}
if (AM_Edge.RightOf(x, e))
{
return(false);
}
}
return(true);
}
internal int NumConnectedFace()
{
if (m_Edge == null)
{
return(0);
}
int nFace = 0;
AM_Edge pNext = m_Edge;
do
{
if (pNext.CcwFace() != null)
{
nFace++;
}
pNext = pNext.Next;
} while (pNext != m_Edge);
return(nFace);
}
bool IsBoundaryVertex(AM_Vertex pvertex)
{
AM_Edge start = pvertex.Edge;
if (start == null)
{
Debug.Assert(false);
return(false); // Indefinito
}
AM_Edge edge = start;
do
{
if (edge.CwFace() == null || edge.CcwFace() == null)
{
return(true);
}
edge = edge.Next;
} while (start != edge);
return(false);
}
internal bool RecoverGenEdge(AM_Mesh2d mesh, int num, List <Point3d> AddArray, bool bStraight = false)
{
// se viene inserito un punto per aggiustare la conformità
// il flag baddFlag diventa true
bool baddFlag = false;
if (!m_bFlagHole && num >= m_GenVertexArray.Count)
{
return(true);
}
int v1 = m_GenVertexArray[num];
int v2 = m_GenVertexArray[(num + 1) % m_GenVertexArray.Count];
if (v2 < v1)
{
v2 += GetNumVertex();
}
AM_Edge pbase;
AM_Edge pprev = pbase = Vertex(v1).Edge;
for (int i = v1 + 1; i <= v2; i++)
{
AM_Vertex pV1 = Vertex((i - 1) % (GetNumVertex()));
AM_Vertex pV2 = Vertex((i) % (GetNumVertex()));
Point2d orgCoord = pV1.Coord;
// si controlla che tutti i vertici siano in sequenza
while (true)
{
Point2d baseCoord = pbase.DestCoord();
Point2d prvCoord = new Point2d(m_ArrayCoord[(i - 1) % (GetNumVertex())]);
Point2d destCoord = new Point2d(m_ArrayCoord[i % (GetNumVertex())]);
if (baseCoord == destCoord)
{
// il vertice è in sequenza: si continua con il successivo
break;
}
else
{
pbase = pbase.Next;
if (pbase == pprev)
{
// il ciclo dell'anello si è chiuso senza trovare il vertice
// successivo; è necessario inserire un vertice in mezzeria del
// lato mancante
if (!bStraight)
{
// 1. Algoritmo di ripristino del bordo con l'aggiunta del punto medio
baddFlag = true; // si segnala l'aggiunta di un vertice
Point3d p1 = m_ArrayCoord[i - 1];
Point3d p2 = (m_ArrayCoord[i % (GetNumVertex())]);
Point3d mid = 0.5 * (p1 + p2);
Point3d insPt = new Point3d(mid.X, mid.Y, 0);
// si inserisce un vertice nel mezzo del
AM_Vertex pvertex;
mesh.InsertPoint(new Point2d(insPt), insPt.Z, out pvertex);
if (pvertex == null)
{
Debug.Assert(false);
//throw 6;
}
InsertVertex(i, pvertex);
v2++;
AddArray.Add(insPt);
// si ricomincia il controllo
pbase = Vertex(i - 1).Edge;
pprev = pbase;
}
else
{
// 2. Algoritmo di ripristino del bordo con swap di spigoli
AM_Edge pdest = Vertex(i).Edge;
Vector2d dir = destCoord - orgCoord;
dir.Unitize();
var m = AM_Util.AffineMatrix(orgCoord, dir);
while (pV1.FindEdge(pV2) == null)
{
bool bCoinc = false;
AM_Edge pSearch = pbase;
// Si controllano situazioni di appartenenza al lato da ripristinare
do
{
double cosang = Vector2d.Multiply(pSearch.GetVersor(), dir);
if (AM_Util.IsEqual(cosang, 1, AM_Util.FLT_EPSILON))
{
// Lo spigolo appartiene già al lato da ripristinare
InsertVertex(i, pSearch.Destination());
v2++;
Point2d dc = pSearch.DestCoord();
AddArray.Add(new Point3d(dc.X, dc.Y, 0));
// si ricomincia il controllo
pbase = Vertex(i - 1).Edge;
pprev = pbase;
bCoinc = true;
break;
}
pSearch = pSearch.Next;
} while (pSearch != pbase);
if (bCoinc)
{
break;
}
// Trova il lato di partenza
pSearch = pbase;
while (!AM_Util.IsInside(pSearch.GetVector(), pSearch.Next.GetVector(), dir))
{
pSearch = pSearch.Next;
if (pSearch == pprev)
{
Debug.Assert(false);
//mesh.ExportMesh("RecoverSt7.txt");
return(false);
}
}
AM_Edge pStartEdge = pSearch.CcwEdge();
List <AM_Edge> swapArray = new List <AM_Edge>();
while (pStartEdge.Destination() != pV2)
{
Point2d o = pStartEdge.OrgCoord();
Point2d d = pStartEdge.DestCoord();
swapArray.Add(pStartEdge);
pStartEdge = pStartEdge.Prev;
Point2d pt = AM_Util.ToLocal(m, pStartEdge.DestCoord());
if (pt.Y < -AM_Util.FLT_EPSILON)
{
pStartEdge = pStartEdge.CcwEdge();
Debug.Assert(AM_Util.ToLocal(m, pStartEdge.DestCoord()).Y > 0);
}
}
for (int j = 0; j < swapArray.Count; j++)
{
AM_Edge pSwapEdge = swapArray[j];
// Vengono ruotati gli spigoli all'interno
if (AM_Util.CheckSwapEdge(pSwapEdge))
{
Debug.Assert(pSearch.CcwFace() != null && pSearch.Next.CwFace() != null);
Debug.Assert(pSwapEdge.CcwFace() != null && pSwapEdge.CwFace() != null);
AM_Face.SwapEdge(pSwapEdge);
}
}
}
}
}
}
}
pbase = Vertex(i % (GetNumVertex())).Edge;
pprev = pbase;
}
return(baddFlag);
}
// --- Copia ---
AM_Boundary CopyBoundary(AM_Mesh2d source, AM_Mesh2d dest,
bool bSameGenVertex = true)
{
AM_Boundary pCopy = new AM_Boundary();
pCopy.m_LoopIndex = m_LoopIndex;
if (bSameGenVertex)
{
// Il numero dei vertici generati è lo stesso;
// viene normalmente usato in caso di 'merge' tra due mesh adiacenti
pCopy.m_ArrayCoord.Capacity = m_ArrayCoord.Count;
for (int i = 0; i < m_ArrayCoord.Count; i++)
{
pCopy.m_ArrayCoord[i] = m_ArrayCoord[i];
}
pCopy.m_GenVertexArray.Capacity = m_GenVertexArray.Count;
for (int i = 0; i < m_GenVertexArray.Count; i++)
{
pCopy.m_GenVertexArray[i] = m_GenVertexArray[i];
}
// Trova il primo vertice
int destVertex = dest.ArrayVertexes.Count;
int nVertex = dest.AddVertex(new Point2d(m_ArrayCoord[0]), m_ArrayCoord[0].Z);
Debug.Assert(nVertex < destVertex); // non vengono aggiunti vertici
AM_Vertex pVertex = dest.ArrayVertexes[nVertex];
pVertex.Flag |= 0x01;
pCopy.m_ArrayVertex.Add(pVertex);
for (int i = 1; i < m_ArrayCoord.Count; i++)
{
Point2d ptDest = new Point2d(m_ArrayCoord[i]);
AM_Edge pEdge = pVertex.Edge;
AM_Edge pNextEdge = pEdge.Next;
while ((ptDest - pNextEdge.DestCoord()).Length > AM_Util.FLT_EPSILON)
{
if (pNextEdge == pEdge)
{
Debug.Assert(false);
nVertex = dest.AddVertex(ptDest, 0);
Debug.Assert(nVertex < destVertex);
pNextEdge = dest.ArrayVertexes[nVertex].Edge.Symm();
break;
}
pNextEdge = pNextEdge.Next;
}
pVertex = pNextEdge.Destination();
pVertex.Flag |= 0x01;
pCopy.m_ArrayVertex.Add(pVertex);
}
Debug.Assert(pCopy.m_ArrayVertex.Count == m_ArrayVertex.Count);
}
else
{
// Il numero dei vertici generati è diverso;
// viene normalmente usato in caso di ricostruzione di contorni
pCopy.m_GenVertexArray.Capacity = m_GenVertexArray.Count;
for (int i = 1; i < m_GenVertexArray.Count; i++)
{
Point2d p0 = new Point2d(m_ArrayCoord[m_GenVertexArray[i - 1]]);
Point2d p1 = new Point2d(m_ArrayCoord[m_GenVertexArray[i]]);
AM_Vertex pV0 = dest.RangeSearch.Search(p0.X, p0.Y);
AM_Vertex pV1 = dest.RangeSearch.Search(p1.X, p1.Y);
Debug.Assert(pV0 != null && pV1 != null);
// La direzione è data dal vettore p0-p1
Vector2d vDir = (p1 - p0);
vDir.Unitize();
pCopy.m_GenVertexArray[i - 1] = pCopy.m_ArrayCoord.Count;
AM_Vertex pV = pV0;
while (pV != pV1)
{
pCopy.m_ArrayCoord.Add(new Point3d(pV.Coord.X, pV.Coord.Y, 0));
pCopy.m_ArrayVertex.Add(pV);
// Trova il vertice successivo
double minCos = -double.MaxValue;
AM_Edge pEdge = pV.Edge;
AM_Edge pDirEdge = null;
do
{
double dirCos = pEdge.GetVersor() * vDir;
if (dirCos > minCos)
{
minCos = dirCos;
pDirEdge = pEdge;
}
pEdge = pEdge.Next;
} while (pEdge != pV.Edge);
Debug.Assert(AM_Util.IsEqual(minCos, 1));
pV = pDirEdge.Destination();
}
}
}
return(pCopy);
}
internal static bool LeftOf(Point2d x, AM_Edge pedge)
{
return(AM_Util.CCW(x, pedge.OrgCoord(), pedge.DestCoord()));
}
// Connessioni
internal bool SetConnection()
{
// testa la compatibilità delle facce. Eventuali problemi
// possono insorgere se vi è incoerenza tra le normali di
// due facce adiacenti
for (int i = 0; i < NumEdges; i++)
{
if (m_pEdges[i].Face != null)
{
return(false);
}
}
Debug.Assert(NumEdges <= 4);
// Inizializza le connessioni preesistenti
AM_Edge [] poldConn = new AM_Edge[8];
for (int i = 0; i < 8; i++)
{
poldConn[i] = null;
}
for (int i = 0; i < NumEdges; i++)
{
AM_Edge pedge = m_pEdges[i];
AM_Edge psymm = pedge.Symm();
pedge.Face = this;
if (pedge.Next != null)
{
poldConn[i * 2] = pedge.Next;
}
pedge.Next = m_pEdges[(i + NumEdges - 1) % NumEdges].Symm();
if (psymm.Prev != null)
{
poldConn[i * 2 + 1] = psymm.Prev;
}
psymm.Prev = m_pEdges[(i + 1) % NumEdges];
}
if (!AdjustConnection(poldConn))
{
// la connessione è fallita: si ripristinano
// le connessioni precedenti
for (int i = 0; i < NumEdges; i++)
{
AM_Edge pedge = m_pEdges[i];
AM_Edge psymm = pedge.Symm();
pedge.Face = null;
if (poldConn[i * 2] != null)
{
pedge.Next = poldConn[i * 2];
}
else
{
pedge.Next = null;
}
if (poldConn[i * 2 + 1] != null)
{
psymm.Prev = poldConn[i * 2 + 1];
}
else
{
psymm.Prev = null;
}
}
return(false);
}
return(true);
}
bool AdjustConnection(AM_Edge[] poldConn)
{
for (int i = 0; i < NumEdges; i++)
{
AM_Edge pconnSx = poldConn[i * 2];
AM_Edge pconnDx = poldConn[(i * 2 + (NumEdges * 2) - 1) % (NumEdges * 2)];
if (pconnDx == null && pconnSx == null)
{
if (Vertex(i).Edge != null)
{
// Inserisce i due spigoli della faccia nell'anello del vertice
// individuato da Vertex(i)
AM_Edge pedge = ((AM_Edge)(Vertex(i).Edge)).FindLastConnected();
Debug.Assert(pedge != null);
AM_Edge poldnextEdge = pedge.Next;
m_pEdges[i].Prev = pedge;
pedge.Next = m_pEdges[i];
poldnextEdge.Prev = m_pEdges[i].Next;
m_pEdges[i].Next.Next = poldnextEdge;
}
else
{
// Lo spigolo è isolato: inizializza l'anello
m_pEdges[i].Prev = m_pEdges[i].Next;
m_pEdges[i].Next.Next = m_pEdges[i];
Vertex(i).Edge = m_pEdges[i];
}
}
else
{
if (pconnSx == pconnDx)
{
continue;
}
// vi erano connessioni preesistenti: l'anello viene aggiornato
if (pconnSx != null) // anello in senso antiorario
{
AM_Edge padjust = pconnSx;
AM_Edge pstart = pconnSx.Prev;
/*TRACE_EDGE(padjust);
* TRACE_EDGE(pstart);*/
int ncheck = 0; //contatore per evitare loop infinito
while (padjust != null)
{
if (ncheck++ > 300)
{
Debug.Assert(false);
return(false);
}
if (padjust.Prev.Next == padjust)
{
break;
}
AM_Edge pnewconn = padjust;
padjust.Prev = pstart.FindLastConnected();
pstart = padjust.Prev;
padjust = pstart.Next;
pstart.Next = pnewconn;
}
}
if (pconnDx != null) // anello in senso orario
{
AM_Edge padjust = pconnDx;
AM_Edge pstart = pconnDx.Next;
/*TRACE_EDGE(padjust);
* TRACE_EDGE(pstart);*/
int ncheck = 0; //contatore per evitare loop infinito
while (padjust != null)
{
if (ncheck++ > 300)
{
Debug.Assert(false);
return(false);
}
if (padjust.Next.Prev == padjust)
{
break;
}
AM_Edge pnewconn = padjust;
padjust.Next = pstart.FindLastConnected(false);
pstart = padjust.Next;
padjust = pstart.Prev;
pstart.Prev = pnewconn;
}
}
}
}
return(true);
}
// --- Impostazioni ---
internal Point2d InsertPoint(AM_Mesh2d pSpaceFunction)
{
AM_Edge pRif = null;
for (int i = 0; i < 3; i++)
{
if (GetNearTriangle(i) == null)
{
pRif = m_pEdges[i];
break;
}
if (GetNearTriangle(i).m_FaceType == EFaceType.FT_ACCEPTED)
{
pRif = m_pEdges[i];
}
}
if (pRif == null)
{
return(Vertex(0).Coord);
}
Point2d thirdPoint = Point2d.Origin;
Point2d midPoint = 0.5 * (pRif.OrgCoord() + pRif.DestCoord());
Point2d directionPoint = m_CircumCenter;
for (int i = 0; i < 3; i++)
{
if (Vertex(i) != pRif.Origin() &&
Vertex(i) != pRif.Destination())
{
thirdPoint = Vertex(i).Coord;
break;
}
}
if (m_CircumCenter == midPoint) //triangolo rettangolo
{
directionPoint = thirdPoint;
}
double radius = TeoricRadius(midPoint, pSpaceFunction);
double p = (pRif.OrgCoord() - pRif.DestCoord()).Length / 2;
double q = (midPoint - m_CircumCenter).Length;
if (radius < p)
{
radius = p;
}
if (q != 0)
{
double tmp = (p * p + q * q) / (2 * q);
if (radius > tmp)
{
radius = tmp;
}
}
Vector2d versor;
if (AM_Edge.LeftOf(directionPoint, pRif) && AM_Edge.RightOf(thirdPoint, pRif) ||
AM_Edge.LeftOf(thirdPoint, pRif) && AM_Edge.RightOf(directionPoint, pRif))
{
versor = midPoint - directionPoint;
}
else
{
versor = directionPoint - midPoint;
}
versor.Unitize();
double d = radius + Math.Sqrt(radius * radius - p * p);
Point2d point = midPoint + d * versor;
return(point);
}
