// for all vertices in loopV, constrain to target
// for all edges in loopV, disable flips and constrain to target
public static void ConstrainVtxLoopTo(MeshConstraints cons, NGonsCore.geometry3Sharp.mesh.DMesh3 mesh, int[] loopV, IProjectionTarget target, int setID = -1)
{
VertexConstraint vc = new VertexConstraint(target);
for (int i = 0; i < loopV.Length; ++i)
{
cons.SetOrUpdateVertexConstraint(loopV[i], vc);
}
EdgeConstraint ec = new EdgeConstraint(EdgeRefineFlags.NoFlip, target);
ec.TrackingSetID = setID;
for (int i = 0; i < loopV.Length; ++i)
{
int v0 = loopV[i];
int v1 = loopV[(i + 1) % loopV.Length];
int eid = mesh.FindEdge(v0, v1);
Debug.Assert(eid != NGonsCore.geometry3Sharp.mesh.DMesh3.InvalidID);
if (eid != NGonsCore.geometry3Sharp.mesh.DMesh3.InvalidID)
{
cons.SetOrUpdateEdgeConstraint(eid, ec);
}
}
}
public static void PreserveBoundaryLoops(MeshConstraints cons, NGonsCore.geometry3Sharp.mesh.DMesh3 mesh)
{
MeshBoundaryLoops loops = new MeshBoundaryLoops(mesh);
foreach (EdgeLoop loop in loops)
{
DCurve3 loopC = MeshUtil.ExtractLoopV(mesh, loop.Vertices);
DCurveProjectionTarget target = new DCurveProjectionTarget(loopC);
ConstrainVtxLoopTo(cons, mesh, loop.Vertices, target);
}
}
public RegionRemesher(NGonsCore.geometry3Sharp.mesh.DMesh3 mesh, int[] regionTris)
{
BaseMesh = mesh;
Region = new DSubmesh3(mesh, regionTris);
Region.ComputeBoundaryInfo(regionTris);
base.mesh = Region.SubMesh;
cur_base_tris = (int[])regionTris.Clone();
// constrain region-boundary edges
bdry_constraints = new MeshConstraints();
MeshConstraintUtil.FixSubmeshBoundaryEdges(bdry_constraints, Region);
SetExternalConstraints(bdry_constraints);
}
// loop through submesh border edges on basemesh, map to submesh, and
// pin those edges / vertices
public static void FixSubmeshBoundaryEdges(MeshConstraints cons, DSubmesh3 sub)
{
Debug.Assert(sub.BaseBorderE != null);
foreach (int base_eid in sub.BaseBorderE)
{
Index2i base_ev = sub.BaseMesh.GetEdgeV(base_eid);
Index2i sub_ev = sub.MapVerticesToSubmesh(base_ev);
int sub_eid = sub.SubMesh.FindEdge(sub_ev.a, sub_ev.b);
Debug.Assert(sub_eid != NGonsCore.geometry3Sharp.mesh.DMesh3.InvalidID);
Debug.Assert(sub.SubMesh.IsBoundaryEdge(sub_eid));
cons.SetOrUpdateEdgeConstraint(sub_eid, EdgeConstraint.FullyConstrained);
cons.SetOrUpdateVertexConstraint(sub_ev.a, VertexConstraint.Pinned);
cons.SetOrUpdateVertexConstraint(sub_ev.b, VertexConstraint.Pinned);
}
}
// for all mesh boundary edges, disable flip/split/collapse
// for all mesh boundary vertices, pin in current position
public static void FixAllBoundaryEdges(MeshConstraints cons, NGonsCore.geometry3Sharp.mesh.DMesh3 mesh)
{
int NE = mesh.MaxEdgeID;
for (int ei = 0; ei < NE; ++ei)
{
if (mesh.IsEdge(ei) && mesh.IsBoundaryEdge(ei))
{
cons.SetOrUpdateEdgeConstraint(ei, EdgeConstraint.FullyConstrained);
Index2i ev = mesh.GetEdgeV(ei);
cons.SetOrUpdateVertexConstraint(ev.a, VertexConstraint.Pinned);
cons.SetOrUpdateVertexConstraint(ev.b, VertexConstraint.Pinned);
}
}
}
public RegionRemesher(NGonsCore.geometry3Sharp.mesh.DMesh3 mesh, IEnumerable <int> regionTris)
{
BaseMesh = mesh;
Region = new DSubmesh3(mesh, regionTris);
int count = regionTris.Count();
Region.ComputeBoundaryInfo(regionTris, count);
base.mesh = Region.SubMesh;
cur_base_tris = regionTris.ToArray();
// constrain region-boundary edges
bdry_constraints = new MeshConstraints();
MeshConstraintUtil.FixSubmeshBoundaryEdges(bdry_constraints, Region);
SetExternalConstraints(bdry_constraints);
}
// for all mesh boundary vertices, pin in current position, but allow collapses
public static void FixAllBoundaryEdges_AllowCollapse(MeshConstraints cons, NGonsCore.geometry3Sharp.mesh.DMesh3 mesh, int setID)
{
EdgeConstraint edgeCons = new EdgeConstraint(EdgeRefineFlags.NoFlip | EdgeRefineFlags.NoSplit);
VertexConstraint vertCons = new VertexConstraint(true, setID);
int NE = mesh.MaxEdgeID;
for (int ei = 0; ei < NE; ++ei)
{
if (mesh.IsEdge(ei) && mesh.IsBoundaryEdge(ei))
{
cons.SetOrUpdateEdgeConstraint(ei, edgeCons);
Index2i ev = mesh.GetEdgeV(ei);
cons.SetOrUpdateVertexConstraint(ev.a, vertCons);
cons.SetOrUpdateVertexConstraint(ev.b, vertCons);
}
}
}
//! This object will be modified !!!
public void SetExternalConstraints(MeshConstraints cons)
{
constraints = cons;
}
