public bool RemoveVertex(uint vId)
{
uint uVId = vId;
if (!BRep.IsUseVertexId(uVId))
{
return(false);
}
uint nEdgeAroundVtx = 0;
{
VertexEdgeItr vItr = new VertexEdgeItr(this, vId);
nEdgeAroundVtx = vItr.GetEdgeCount();
}
if (nEdgeAroundVtx == 0)
{
System.Diagnostics.Debug.Assert(BRep.IsUseVertexId(uVId));
if (!BRep.KVEL(uVId))
{
System.Diagnostics.Debug.Assert(false);
}
}
else if (nEdgeAroundVtx == 2)
{
UseVertex uV = BRep.GetUseVertex(uVId);
uint hEId1 = uV.HEId;
HalfEdge hE1 = BRep.GetHalfEdge(hEId1);
uint eId1 = hE1.EId;
uint hEId2 = hE1.OHEId;
HalfEdge hE2 = BRep.GetHalfEdge(hEId2);
{
uint uLId1 = hE1.ULId;
uint uLId2 = hE2.ULId;
LoopEdgeItr lItr1 = new LoopEdgeItr(this, hEId1, uLId1);
LoopEdgeItr lItr2 = new LoopEdgeItr(this, hEId2, uLId2);
uint nLV1 = lItr1.GetUseLoopVertexCount();
uint nLV2 = lItr2.GetUseLoopVertexCount();
System.Diagnostics.Debug.Assert(nLV1 > 1 && nLV2 > 1);
if (nLV1 == 2 || nLV2 == 2)
{
return(false);
}
}
uint uVId2 = hE2.UVId;
System.Diagnostics.Debug.Assert(BRep.IsUseVertexId(uVId2));
uint removeHEId1 = hEId1;
if (!BRep.KVE(removeHEId1))
{
System.Diagnostics.Debug.Assert(false);
}
System.Diagnostics.Debug.Assert(BRep.AssertValidUse() == 0);
Edge2HalfEdge.Remove(eId1);
}
System.Diagnostics.Debug.Assert(AssertValid());
return(true);
}
public LoopEdgeItr(LoopEdgeItr src)
{
IsValid = src.IsValid;
IsInitial = src.IsInitial;
IsChildEnd = src.IsChildEnd;
HEId = src.HEId;
ULId = src.ULId;
BRep2D.Copy(src.BRep2D);
}
public static LoopEdgeItr operator++(LoopEdgeItr src)
{
LoopEdgeItr dest = new LoopEdgeItr(src);
if (!src.IsValid)
{
return(dest);
}
dest.IsInitial = false;
System.Diagnostics.Debug.Assert(dest.BRep2D.BRep.IsHalfEdgeId(dest.HEId));
HalfEdge hE = dest.BRep2D.BRep.GetHalfEdge(dest.HEId);
dest.HEId = hE.FHEId;
return(dest);
}
public bool SwapLoopEdgeItr(LoopEdgeItr lItr, uint toLId)
{
uint toParentULId;
{
toParentULId = Loop2UseLoop[toLId];
UseLoop uL = BRep.GetUseLoop(toParentULId);
System.Diagnostics.Debug.Assert(uL.ParentULId == toParentULId);
}
uint fromULId = lItr.GetUseLoopId();
{
System.Diagnostics.Debug.Assert(BRep.IsUseLoopId(fromULId));
UseLoop uL = BRep.GetUseLoop(fromULId);
System.Diagnostics.Debug.Assert(uL.ParentULId != fromULId);
}
BRep.MoveUseLoop(fromULId, toParentULId);
BRep.SetUseLoopLoopId(fromULId, toLId);
return(true);
}
public bool IsSameUseLoop(LoopEdgeItr lItr)
{
return(lItr.ULId == ULId);
}
public bool MoveLoop(uint lId, OpenTK.Vector2d vecDelta)
{
if (!IsElementId(CadElementType.Loop, lId))
{
return(false);
}
Dictionary <uint, OpenTK.Vector2d> mapOldVec = new Dictionary <uint, OpenTK.Vector2d>();
HashSet <uint> setLId = new HashSet <uint>(); // check these loop for intersection detection
for (LoopEdgeItr lItr = this.BRep.GetLoopEdgeItr(lId); !lItr.IsChildEnd; lItr.ShiftChildLoop())
{
for (lItr.Begin(); !lItr.IsEnd(); lItr++)
{
uint vId = lItr.GetVertexId();
if (mapOldVec.ContainsKey(vId))
{
continue; // this point is already moved
}
mapOldVec.Add(vId, GetVertexCoord(vId));
Vertex2D vertex = VertexArray.GetObject(vId);
{
double oldX = vertex.Point.X;
double oldY = vertex.Point.Y;
vertex.Point = new OpenTK.Vector2d(oldX + vecDelta.X, oldY + vecDelta.Y);
}
uint eId0;
bool isSameDir0;
lItr.GetEdgeId(out eId0, out isSameDir0);
if (!IsElementId(CadElementType.Edge, eId0))
{
continue; // this is point
}
uint lLId;
uint rLId;
this.GetEdgeLoopId(out lLId, out rLId, eId0);
if (!setLId.Contains(lLId))
{
setLId.Add(lLId);
}
if (!setLId.Contains(rLId))
{
setLId.Add(rLId);
}
}
}
foreach (uint lIdl0 in setLId)
{
if (!IsElementId(CadElementType.Loop, lIdl0))
{
continue; // id0 can be 0 if this loop(id_l) have open boundary
}
if (CheckLoop(lIdl0) != 0)
{
// fail
foreach (var oldVec in mapOldVec)
{
uint vId = oldVec.Key;
Vertex2D vertex = VertexArray.GetObject(vId);
vertex.Point = oldVec.Value;
}
return(false);
}
}
return(true);
}