SurfaceCurvatureNormal Property |
Namespace: Rhino.Geometry
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; } } }
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)