/// <summary>
/// Finds the Segment from the DCurve3 closes to the position
/// </summary>
/// <param name="curve">DCurve3</param>
/// <param name="position">Vector3d</param>
/// <returns>Integer Sgement index</returns>
public static int NearestSegment(this DCurve3 curve, Vector3d position)
{
_ = curve.DistanceSquared(position, out int iSeg, out double tangent);
return(iSeg);
}
protected override void Update_GenerateMap()
{
base.begin_update();
if (MeshSource == null)
{
throw new Exception("EnclosedRegionOffsetOp: must set valid MeshSource to compute!");
}
if (MeshSource.HasSpatial == false)
{
throw new Exception("EnclosedRegionOffsetOp: MeshSource must have spatial data structure!");
}
IMesh imesh = MeshSource.GetIMesh();
if (imesh.HasVertexNormals == false)
{
throw new Exception("EnclosedRegionOffsetOp: input mesh does not have surface normals...");
}
if (imesh is DMesh3 == false)
{
throw new Exception("EnclosedRegionOffsetOp: in current implementation, input mesh must be a DMesh3. Ugh.");
}
DMesh3 mesh = imesh as DMesh3;
ISpatial spatial = MeshSource.GetSpatial();
DCurve3 curve = new DCurve3(CurveSource.GetICurve());
MeshFacesFromLoop loop = new MeshFacesFromLoop(mesh, curve, spatial);
// [RMS] this is all f'n ugly!
MeshVertexSelection selection = new MeshVertexSelection(mesh);
selection.SelectTriangleVertices(loop.InteriorTriangles);
// [TODO] do this inline w/ loop below? but then no maxdist!
Dictionary <int, double> dists = new Dictionary <int, double>();
double max_dist = 0;
foreach (int vid in selection)
{
Vector3d v = mesh.GetVertex(vid);
int inearseg; double nearsegt;
double min_dist_sqr = curve.DistanceSquared(v, out inearseg, out nearsegt);
min_dist_sqr = Math.Sqrt(min_dist_sqr);
max_dist = Math.Max(min_dist_sqr, max_dist);
dists[vid] = min_dist_sqr;
}
lock (Displacement) {
Displacement.Clear();
Displacement.Resize(mesh.MaxVertexID);
// todo: can do this in parallel...
foreach (int vid in selection)
{
//Vector3d v = mesh.GetVertex(vid);
// [TODO]...
double dist = max_dist - dists[vid];
double falloff = Falloff.FalloffT(dist / max_dist);
Vector3d n = mesh.GetVertexNormal(vid);
n = n - n.Dot(normal) * normal;
n.Normalize();
Displacement[vid] = falloff * offset_distance * n;
}
}
// smooth it?
base.complete_update();
}