public static Rhino.Geometry.NurbsSurface ToRhino_NurbsSurface(this global::Topologic.NurbsSurface nurbsSurface)
{
int uDegree = nurbsSurface.UDegree;
int vDegree = nurbsSurface.VDegree;
bool isRational = nurbsSurface.IsURational && nurbsSurface.IsVRational;
int uCount = nurbsSurface.NumOfUControlVertices;
int vCount = nurbsSurface.NumOfVControlVertices;
Rhino.Geometry.NurbsSurface ghNurbsSurface = Rhino.Geometry.NurbsSurface.Create(
3,
isRational,
uDegree + 1,
vDegree + 1,
uCount,
vCount
);
int i = 0;
for (int u = 0; u < uCount; ++u)
{
for (int v = 0; v < vCount; ++v)
{
global::Topologic.Vertex controlVertex = nurbsSurface.ControlVertex(u, v);
ghNurbsSurface.Points.SetPoint(u, v, ToRhino(controlVertex));
++i;
}
}
List <double> uKnots = nurbsSurface.UKnots;
uKnots = uKnots.GetRange(1, uKnots.Count - 2);
for (int u = 0; u < uKnots.Count; u++)
{
ghNurbsSurface.KnotsU[u] = uKnots[u];
}
List <double> vKnots = nurbsSurface.VKnots;
vKnots = vKnots.GetRange(1, vKnots.Count - 2);
for (int v = 0; v < vKnots.Count; v++)
{
ghNurbsSurface.KnotsV[v] = vKnots[v];
}
if (!ghNurbsSurface.IsValid)
{
throw new Exception("A valid surface cannot be created from this Face.");
}
return(ghNurbsSurface);
}
public static Rhino.Geometry.Surface ToRhino(global::Topologic.Face face)
{
Object faceGeometry = face.BasicGeometry;
// 1. Compute the base surface Based on https://developer.rhino3d.com/api/RhinoCommon/html/M_Rhino_Geometry_NurbsSurface_Create.htm
global::Topologic.NurbsSurface nurbsSurface = faceGeometry as global::Topologic.NurbsSurface;
if (nurbsSurface != null)
{
return(ToRhino_NurbsSurface(nurbsSurface));
}
global::Topologic.PlanarSurface planarSurface = faceGeometry as global::Topologic.PlanarSurface;
if (planarSurface != null)
{
PlaneSurface planeSurface = ToRhino(planarSurface, face);
return(planeSurface);
}
throw new Exception("An invalid surface is created.");
}
