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);
}
}
/// <summary>
/// add topological edges/vertices as constraints for remeshing
/// </summary>
public void AddRemeshConstraints(MeshConstraints constraints)
{
validate_topology();
int set_index = 10;
foreach (EdgeSpan span in Spans)
{
var target = new DCurveProjectionTarget(span.ToCurve());
MeshConstraintUtil.ConstrainVtxSpanTo(constraints, Mesh, span.Vertices, target, set_index++);
}
foreach (EdgeLoop loop in Loops)
{
var target = new DCurveProjectionTarget(loop.ToCurve());
MeshConstraintUtil.ConstrainVtxLoopTo(constraints, Mesh, loop.Vertices, target, set_index++);
}
VertexConstraint corners = VertexConstraint.Pinned;
corners.FixedSetID = -1;
foreach (int vid in JunctionVertices)
{
if (constraints.HasVertexConstraint(vid))
{
VertexConstraint v = constraints.GetVertexConstraint(vid);
v.Target = null;
v.Fixed = true;
v.FixedSetID = -1;
constraints.SetOrUpdateVertexConstraint(vid, v);
}
else
{
constraints.SetOrUpdateVertexConstraint(vid, corners);
}
}
}
protected override void SolveInstance(IGH_DataAccess DA)
{
DMesh3_goo dMsh_goo = null;
List <Point3d> points = new List <Point3d>();
double targetL = 0;
int numI = 0;
int fixB = 0;
bool projBack = false;
double smooth = 0;
DA.GetData(0, ref dMsh_goo);
DA.GetDataList(2, points);
DA.GetData(1, ref targetL);
DA.GetData(6, ref numI);
DA.GetData(3, ref fixB);
DA.GetData(5, ref projBack);
DA.GetData(7, ref smooth);
List <EdgeConstraint_goo> edgeC = new List <EdgeConstraint_goo>();
DA.GetDataList(4, edgeC);
DMesh3 dMsh_copy = new DMesh3(dMsh_goo.Value);
Remesher r = new Remesher(dMsh_copy);
r.PreventNormalFlips = true;
r.SetTargetEdgeLength(targetL);
r.SmoothSpeedT = smooth;
if (fixB == 2)
{
MeshConstraintUtil.FixAllBoundaryEdges(r);
}
else if (fixB == 1)
{
MeshConstraintUtil.PreserveBoundaryLoops(r);
}
else
{
r.SetExternalConstraints(new MeshConstraints());
}
if (edgeC.Count > 0)
{
for (int i = 0; i < edgeC.Count; i++)
{
var tempEC = edgeC[i];
IProjectionTarget target = new DCurveProjectionTarget(tempEC.crv);
for (int j = 0; j < tempEC.edges.Length; j++)
{
tempEC.constraint.Target = target;
r.Constraints.SetOrUpdateEdgeConstraint(tempEC.edges[j], tempEC.constraint);
}
for (int j = 0; j < tempEC.vertices.Length; j++)
{
if (tempEC.PinVerts)
{
r.Constraints.SetOrUpdateVertexConstraint(tempEC.vertices[j], VertexConstraint.Pinned);
}
else
{
r.Constraints.SetOrUpdateVertexConstraint(tempEC.vertices[j], new VertexConstraint(target));
}
}
}
}
if (points.Count > 0)
{
DMeshAABBTree3 mshAABB = new DMeshAABBTree3(dMsh_copy, true);
var v3pts = points.Select(pt => pt.ToVec3d());
foreach (var p in v3pts)
{
int id = mshAABB.FindNearestVertex(p, 0.1);
if (id != -1)
{
r.Constraints.SetOrUpdateVertexConstraint(id, VertexConstraint.Pinned);
}
}
}
if (projBack)
{
r.SetProjectionTarget(MeshProjectionTarget.Auto(dMsh_goo.Value));
}
for (int k = 0; k < numI; ++k)
{
r.BasicRemeshPass();
}
bool isValid = dMsh_copy.CheckValidity();
if (!isValid)
{
this.AddRuntimeMessage(GH_RuntimeMessageLevel.Warning, "Mesh seems to have been corrupted during remeshing. Please check...");
}
DA.SetData(0, dMsh_copy);
}
public static void quick_test_2()
{
DMesh3 target = TestUtil.LoadTestInputMesh("cylinder_orig.obj");
DMeshAABBTree3 targetSpatial = new DMeshAABBTree3(target, true);
DMesh3 mesh = TestUtil.LoadTestInputMesh("cylinder_approx.obj");
DMeshAABBTree3 meshSpatial = new DMeshAABBTree3(mesh, true);
double search_dist = 10.0;
MeshTopology topo = new MeshTopology(target);
topo.Compute();
RemesherPro r = new RemesherPro(mesh);
r.SetTargetEdgeLength(2.0);
r.SmoothSpeedT = 0.5;
r.SetProjectionTarget(MeshProjectionTarget.Auto(target));
MeshConstraints cons = new MeshConstraints();
r.SetExternalConstraints(cons);
int set_id = 1;
foreach (var loop in topo.Loops)
{
DCurveProjectionTarget curveTarget = new DCurveProjectionTarget(loop.ToCurve(target));
set_id++;
// pick a set of points we will find paths between. We will chain
// up those paths and constrain them to target loops.
// (this part is the hack!)
List <int> target_verts = new List <int>();
List <int> mesh_verts = new List <int>();
for (int k = 0; k < loop.VertexCount; k += 5)
{
target_verts.Add(loop.Vertices[k]);
Vector3d vCurve = target.GetVertex(loop.Vertices[k]);
int mesh_vid = meshSpatial.FindNearestVertex(vCurve, search_dist);
mesh_verts.Add(mesh_vid);
}
int NT = target_verts.Count;
// find the paths to assemble the edge chain
// [TODO] need to filter out junction vertices? or will they just handle themselves
// because they can be collapsed away?
List <int> vert_seq = new List <int>();
for (int k = 0; k < NT; k++)
{
EdgeSpan e = find_edge_path(mesh, mesh_verts[k], mesh_verts[(k + 1) % NT]);
int n = e.Vertices.Length;
for (int i = 0; i < n - 1; ++i)
{
vert_seq.Add(e.Vertices[i]);
}
}
// now it's easy, just add the loop constraint
EdgeLoop full_loop = EdgeLoop.FromVertices(mesh, vert_seq);
MeshConstraintUtil.ConstrainVtxLoopTo(cons, mesh, full_loop.Vertices, curveTarget, set_id);
}
r.FastestRemesh();
TestUtil.WriteTestOutputMesh(mesh, "curves_test_out.obj");
}
public void Close_Flat()
{
double minlen, maxlen, avglen;
MeshQueries.EdgeLengthStats(Mesh, out minlen, out maxlen, out avglen, 1000);
double target_edge_len = (TargetEdgeLen <= 0) ? avglen : TargetEdgeLen;
// massage around boundary loop
cleanup_boundary(Mesh, InitialBorderLoop, avglen, 3);
// find new border loop
// [TODO] this just assumes there is only one!!
MeshBoundaryLoops loops = new MeshBoundaryLoops(Mesh);
EdgeLoop fill_loop = loops.Loops[0];
int extrude_group = (ExtrudeGroup == -1) ? Mesh.AllocateTriangleGroup() : ExtrudeGroup;
int fill_group = (FillGroup == -1) ? Mesh.AllocateTriangleGroup() : FillGroup;
// decide on projection plane
//AxisAlignedBox3d loopbox = fill_loop.GetBounds();
//Vector3d topPt = loopbox.Center;
//if ( bIsUpper ) {
// topPt.y = loopbox.Max.y + 0.25 * dims.y;
//} else {
// topPt.y = loopbox.Min.y - 0.25 * dims.y;
//}
//Frame3f plane = new Frame3f((Vector3f)topPt);
// extrude loop to this plane
MeshExtrusion extrude = new MeshExtrusion(Mesh, fill_loop);
extrude.PositionF = (v, n, i) => {
return(FlatClosePlane.ProjectToPlane((Vector3F)v, 1));
};
extrude.Extrude(extrude_group);
MeshValidation.IsBoundaryLoop(Mesh, extrude.NewLoop);
Debug.Assert(Mesh.CheckValidity());
// smooth the extrude loop
MeshLoopSmooth loop_smooth = new MeshLoopSmooth(Mesh, extrude.NewLoop);
loop_smooth.ProjectF = (v, i) => {
return(FlatClosePlane.ProjectToPlane((Vector3F)v, 1));
};
loop_smooth.Alpha = 0.5f;
loop_smooth.Rounds = 100;
loop_smooth.Smooth();
Debug.Assert(Mesh.CheckValidity());
// fill result
SimpleHoleFiller filler = new SimpleHoleFiller(Mesh, extrude.NewLoop);
filler.Fill(fill_group);
Debug.Assert(Mesh.CheckValidity());
// make selection for remesh region
MeshFaceSelection remesh_roi = new MeshFaceSelection(Mesh);
remesh_roi.Select(extrude.NewTriangles);
remesh_roi.Select(filler.NewTriangles);
remesh_roi.ExpandToOneRingNeighbours();
remesh_roi.ExpandToOneRingNeighbours();
remesh_roi.LocalOptimize(true, true);
int[] new_roi = remesh_roi.ToArray();
// get rid of extrude group
FaceGroupUtil.SetGroupToGroup(Mesh, extrude_group, 0);
/* clean up via remesh
* - constrain loop we filled to itself
*/
RegionRemesher r = new RegionRemesher(Mesh, new_roi);
DCurve3 top_curve = mesh.MeshUtil.ExtractLoopV(Mesh, extrude.NewLoop.Vertices);
DCurveProjectionTarget curve_target = new DCurveProjectionTarget(top_curve);
int[] top_loop = (int[])extrude.NewLoop.Vertices.Clone();
r.Region.MapVerticesToSubmesh(top_loop);
MeshConstraintUtil.ConstrainVtxLoopTo(r.Constraints, r.Mesh, top_loop, curve_target);
DMeshAABBTree3 spatial = new DMeshAABBTree3(Mesh);
spatial.Build();
MeshProjectionTarget target = new MeshProjectionTarget(Mesh, spatial);
r.SetProjectionTarget(target);
bool bRemesh = true;
if (bRemesh)
{
r.Precompute();
r.EnableFlips = r.EnableSplits = r.EnableCollapses = true;
r.MinEdgeLength = target_edge_len;
r.MaxEdgeLength = 2 * target_edge_len;
r.EnableSmoothing = true;
r.SmoothSpeedT = 1.0f;
for (int k = 0; k < 40; ++k)
{
r.BasicRemeshPass();
}
r.SetProjectionTarget(null);
r.SmoothSpeedT = 0.25f;
for (int k = 0; k < 10; ++k)
{
r.BasicRemeshPass();
}
Debug.Assert(Mesh.CheckValidity());
r.BackPropropagate();
}
// smooth around the join region to clean up ugliness
smooth_region(Mesh, r.Region.BaseBorderV, 3);
}
