P_Rhino_Geometry_SurfaceCurvature_Normal - mcneel/rhinocommon-api-docs GitHub Wiki
Gets the surface normal at UV.
Namespace: Rhino.Geometry
Assembly: RhinoCommon (in RhinoCommon.dll) Version: Rhino 6.0
C#
public Vector3d Normal { get; }VB
Public ReadOnly Property Normal As Vector3d
GetType: Vector3d
VB
Imports Rhino
Imports Rhino.DocObjects
Imports Rhino.Input
Imports Rhino.Commands
Namespace examples_vb
Public Class PrincipalCurvatureCommand
Inherits Command
Public Overrides ReadOnly Property EnglishName() As String
Get
Return "vbPrincipalCurvature"
End Get
End Property
Protected Overrides Function RunCommand(doc As RhinoDoc, mode As RunMode) As Result
Dim obj_ref As ObjRef = Nothing
Dim rc = RhinoGet.GetOneObject("Select surface for curvature measurement", True,
ObjectType.Surface, obj_ref)
If rc <> Result.Success Then
Return rc
End If
Dim surface = obj_ref.Surface()
Dim gp = New Rhino.Input.Custom.GetPoint()
gp.SetCommandPrompt("Select point on surface for curvature measurement")
gp.Constrain(surface, False)
gp.[Get]()
If gp.CommandResult() <> Result.Success Then
Return gp.CommandResult()
End If
Dim point_on_surface = gp.Point()
Dim u As Double, v As Double
If Not surface.ClosestPoint(point_on_surface, u, v) Then
Return Result.Failure
End If
Dim surface_curvature = surface.CurvatureAt(u, v)
If surface_curvature Is Nothing Then
Return Result.Failure
End If
RhinoApp.WriteLine("Surface curvature evaluation at parameter: ({0}, {1})", u, v)
RhinoApp.WriteLine(" 3-D Point: {0}", surface_curvature.Point)
RhinoApp.WriteLine(" 3-D Normal: {0}", surface_curvature.Normal)
RhinoApp.WriteLine(" Maximum principal curvature: {0} ({1})", surface_curvature.Kappa(0), surface_curvature.Direction(0))
RhinoApp.WriteLine(" Minimum principal curvature: {0} ({1})", surface_curvature.Kappa(1), surface_curvature.Direction(1))
RhinoApp.WriteLine(" Gaussian curvature: {0}", surface_curvature.Gaussian)
RhinoApp.WriteLine(" Mean curvature: {0}", surface_curvature.Mean)
Return Result.Success
End Function
End Class
End NamespaceC#
using Rhino;
using Rhino.DocObjects;
using Rhino.Input;
using Rhino.Commands;
namespace examples_cs
{
public class PrincipalCurvatureCommand : Command
{
public override string EnglishName { get { return "csPrincipalCurvature"; } }
protected override Result RunCommand(RhinoDoc doc, RunMode mode)
{
ObjRef obj_ref;
var rc = RhinoGet.GetOneObject("Select surface for curvature measurement", true,
ObjectType.Surface, out obj_ref);
if (rc != Result.Success)
return rc;
var surface = obj_ref.Surface();
var gp = new Rhino.Input.Custom.GetPoint();
gp.SetCommandPrompt("Select point on surface for curvature measurement");
gp.Constrain(surface, false);
gp.Get();
if (gp.CommandResult() != Result.Success)
return gp.CommandResult();
var point_on_surface = gp.Point();
double u, v;
if (!surface.ClosestPoint(point_on_surface, out u, out v))
return Result.Failure;
var surface_curvature = surface.CurvatureAt(u, v);
if (surface_curvature == null)
return Result.Failure;
RhinoApp.WriteLine("Surface curvature evaluation at parameter: ({0}, {1})", u, v);
RhinoApp.WriteLine(" 3-D Point: ({0}, {1}, {2})",
surface_curvature.Point.X,
surface_curvature.Point.Y,
surface_curvature.Point.Z);
RhinoApp.WriteLine(" 3-D Normal: ({0}, {1}, {2})",
surface_curvature.Normal.X,
surface_curvature.Normal.Y,
surface_curvature.Normal.Z);
RhinoApp.WriteLine(string.Format(" Maximum principal curvature: {0} ({1}, {2}, {3})",
surface_curvature.Kappa(0),
surface_curvature.Direction(0).X,
surface_curvature.Direction(0).Y,
surface_curvature.Direction(0).Z));
RhinoApp.WriteLine(string.Format(" Minimum principal curvature: {0} ({1}, {2}, {3})",
surface_curvature.Kappa(1),
surface_curvature.Direction(1).X,
surface_curvature.Direction(1).Y,
surface_curvature.Direction(1).Z));
RhinoApp.WriteLine(" Gaussian curvature: {0}", surface_curvature.Gaussian);
RhinoApp.WriteLine(" Mean curvature: {0}", surface_curvature.Mean);
return Result.Success;
}
}
}Python
import rhinoscriptsyntax as rs
surface_id,_,_,_,_,_ = rs.GetSurfaceObject("Select surface for curvature measurement")
point = rs.GetPointOnSurface(surface_id,
"Select point on surface for curvature measurement")
u,v = rs.SurfaceClosestPoint(surface_id, point)
#point, normal, kappa_u, direction_u, kappa_v, direction_v, gaussian, mean =
surface_curvature = rs.SurfaceCurvature(surface_id, (u,v))
point, normal, kappa_u, direction_u, kappa_v, direction_v, gaussian, mean = surface_curvature
print "Surface curvature evaluation at parameter: ({0}, {1})".format(u,v)
print " 3-D Point: ({0}, {1}, {2})".format(point.X, point.Y, point.Z)
print " 3-D Normal: ({0}, {1}, {2})".format(normal.X, normal.Y, normal.Z)
print " Maximum principal curvature: {0} ({1}, {2}, {3})".format(
kappa_u, direction_u.X, direction_u.Y, direction_u.Z)
print " Minimum principal curvature: {0} ({1}, {2}, {3})".format(
kappa_v, direction_v.X, direction_v.Y, direction_v.Z)
print " Gaussian curvature: {0}".format(gaussian)
print " Mean curvature: {0}".format(mean)Supported in: 6.0.16224.21491, 5D58w