public static Rhino.Commands.Result AddTorus(Rhino.RhinoDoc doc)
{
const double major_radius = 4.0;
const double minor_radius = 2.0;
Rhino.Geometry.Plane plane = Rhino.Geometry.Plane.WorldXY;
Rhino.Geometry.Torus torus = new Rhino.Geometry.Torus(plane, major_radius, minor_radius);
Rhino.Geometry.RevSurface revsrf = torus.ToRevSurface();
if (doc.Objects.AddSurface(revsrf) != Guid.Empty)
{
doc.Views.Redraw();
return(Rhino.Commands.Result.Success);
}
return(Rhino.Commands.Result.Failure);
}
protected override Result RunCommand(RhinoDoc doc, RunMode mode)
{
Rhino.Input.Custom.GetObject go = new Rhino.Input.Custom.GetObject();
go.SetCommandPrompt("Select sphere");
go.GeometryFilter = Rhino.DocObjects.ObjectType.Surface;
go.GeometryAttributeFilter = Rhino.Input.Custom.GeometryAttributeFilter.ClosedSurface;
go.SubObjectSelect = false;
go.Get();
if (go.CommandResult() != Result.Success)
{
return(go.CommandResult());
}
Rhino.Geometry.Brep brep = go.Object(0).Brep();
if (null == brep || 1 != brep.Faces.Count)
{
return(Result.Failure);
}
Rhino.Geometry.Surface srf = brep.Faces[0].UnderlyingSurface();
if (null == srf)
{
return(Result.Failure);
}
Rhino.Geometry.Sphere sphere;
if (!srf.TryGetSphere(out sphere))
{
RhinoApp.WriteLine("Surface is not a sphere");
return(Result.Nothing);
}
Rhino.Input.Custom.GetNumber gn = new Rhino.Input.Custom.GetNumber();
gn.SetCommandPrompt("New radius");
gn.SetDefaultNumber(sphere.Radius);
gn.SetLowerLimit(1.0, false); // or whatever you deem appripriate...
gn.Get();
if (gn.CommandResult() != Result.Success)
{
return(gn.CommandResult());
}
sphere.Radius = gn.Number();
// Sometimes, Surface.TryGetSphere() will return a sphere with a left-handed
// plane. So, ensure the plane is right-handed.
Rhino.Geometry.Plane plane = new Rhino.Geometry.Plane(
sphere.EquitorialPlane.Origin,
sphere.EquitorialPlane.XAxis,
sphere.EquitorialPlane.YAxis
);
sphere.EquitorialPlane = plane;
Rhino.Geometry.RevSurface rev_srf = sphere.ToRevSurface();
if (null != rev_srf)
{
doc.Objects.Replace(go.Object(0).ObjectId, rev_srf);
doc.Views.Redraw();
}
return(Result.Success);
}
