//create a mesh from polyline by kangaroo plankton mesh
public static Mesh polylineToMesh(Polyline C)
{
KPlanktonMesh KM = new KPlanktonMesh();
var points = new Rhino.Collections.Point3dList();
var faceIndices = new List <int>();
for (int i = 0; i < C.SegmentCount; i++)
{
int nearest = points.ClosestIndex(C.PointAt(i));
if (nearest == -1)
{
faceIndices.Add(KM.Vertices.Count);
KM.Vertices.Add(C.PointAt(i));
points.Add(C.PointAt(i));
}
else
{
if (points[nearest].DistanceTo(C.PointAt(i)) < 1e-4)
{
faceIndices.Add(nearest);
}
else
{
faceIndices.Add(KM.Vertices.Count);
KM.Vertices.Add(C.PointAt(i));
points.Add(C.PointAt(i));
}
}
}
KM.Faces.AddFace(faceIndices);
return(KM.ToRhinoMesh());
}
//get hinge 4 points from mesh
public static List <List <Point3d> > HingeVertices(Mesh M)
{
List <List <Point3d> > points = new List <List <Point3d> >();
KPlanktonMesh km = M.ToKPlanktonMesh();
for (int i = 0; i < km.Halfedges.Count; i += 2)
{
if (km.Halfedges.IsBoundary(i))
{
continue;
}
List <Point3d> thisPs = new List <Point3d>();
int nEi = km.Halfedges[i + 1].NextHalfedge; // next edge id
int nPi = km.Halfedges[i].PrevHalfedge; // next edge id
// foldStart
thisPs.Add(km.Vertices[km.Halfedges[i].StartVertex].ToPoint3d());
// foldEnd
thisPs.Add(km.Vertices[km.Halfedges[i + 1].StartVertex].ToPoint3d());
// tipA
thisPs.Add(km.Vertices[km.Halfedges[nEi + 1].StartVertex].ToPoint3d());
// tipB
thisPs.Add(km.Vertices[km.Halfedges[nPi].StartVertex].ToPoint3d());
points.Add(thisPs);
}
return(points);
}