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 bool MoveVertex(uint vId, OpenTK.Vector2d vec)
{
if (!VertexArray.IsObjectId(vId))
{
return(false);
}
OpenTK.Vector2d preVec;
{
// store point to move point back in case it fails
Vertex2D vertex = VertexArray.GetObject(vId);
preVec = vertex.Point;
}
OpenTK.Vector2d dist = vec;
{
// move point
Vertex2D vertex = VertexArray.GetObject(vId);
vertex.Point = dist;
}
try
{
VertexEdgeItr vItr = this.BRep.GetVertexEdgeItr(vId);
if (vItr.GetEdgeCount() == 0)
{
// move point inside loop
uint lId = vItr.GetLoopId();
if (IsElementId(CadElementType.Loop, lId))
{
// ignore vtx(id_v) in the signd distance computation
double distance = SignedDistancePointLoop(lId, vec, vId);
if (distance < this.MinClearance)
{
throw new InvalidOperationException();
}
}
}
else
{
// move point adjacent to loop
HashSet <uint> lIds = new HashSet <uint>();
for (; !vItr.IsEnd(); vItr++)
{
uint lId = vItr.GetLoopId();
if (IsElementId(CadElementType.Loop, lId))
{
if (!lIds.Contains(lId))
{
lIds.Add(lId);
}
else
{
continue;
}
if (CheckLoop(lId) != 0)
{
throw new InvalidOperationException();
}
}
}
}
}
catch (Exception exception)
{
////////////////////////////////
// fail
{ // reset the moved point
Vertex2D vertex = VertexArray.GetObject(vId);
vertex.Point = preVec;
}
return(false);
}
return(true);
}
