P_Rhino_Geometry_BrepFace_OrientationIsReversed - mcneel/rhinocommon-api-docs GitHub Wiki
true if face orientation is opposite of natural surface orientation.
Namespace: Rhino.Geometry
Assembly: RhinoCommon (in RhinoCommon.dll) Version: Rhino 6.0
C#
public bool OrientationIsReversed { get; set; }VB
Public Property OrientationIsReversed As Boolean
Get
SetType: Boolean
VB
Imports Rhino
Imports Rhino.Input.Custom
Imports Rhino.DocObjects
Imports Rhino.Commands
Namespace examples_vb
Public Class NormalDirectionOfBrepFaceCommand
Inherits Command
Public Overrides ReadOnly Property EnglishName() As String
Get
Return "vbDetermineNormDirectionOfBrepFace"
End Get
End Property
Protected Overrides Function RunCommand(doc As RhinoDoc, mode As RunMode) As Result
' select a surface
Dim gs = New GetObject()
gs.SetCommandPrompt("select surface")
gs.GeometryFilter = ObjectType.Surface
gs.DisablePreSelect()
gs.SubObjectSelect = False
gs.[Get]()
If gs.CommandResult() <> Result.Success Then
Return gs.CommandResult()
End If
' get the selected face
Dim face = gs.[Object](0).Face()
If face Is Nothing Then
Return Result.Failure
End If
' pick a point on the surface. Constain
' picking to the face.
Dim gp = New GetPoint()
gp.SetCommandPrompt("select point on surface")
gp.Constrain(face, False)
gp.[Get]()
If gp.CommandResult() <> Result.Success Then
Return gp.CommandResult()
End If
' get the parameters of the point on the
' surface that is clesest to gp.Point()
Dim u As Double, v As Double
If face.ClosestPoint(gp.Point(), u, v) Then
Dim direction = face.NormalAt(u, v)
If face.OrientationIsReversed Then
direction.Reverse()
End If
RhinoApp.WriteLine(String.Format("Surface normal at uv({0:f},{1:f}) = ({2:f},{3:f},{4:f})", u, v, direction.X, direction.Y, direction.Z))
End If
Return Result.Success
End Function
End Class
End NamespaceC#
using Rhino;
using Rhino.Input.Custom;
using Rhino.DocObjects;
using Rhino.Commands;
namespace examples_cs
{
public class NormalDirectionOfBrepFaceCommand : Command
{
public override string EnglishName { get { return "csDetermineNormalDirectionOfBrepFace"; } }
protected override Result RunCommand(RhinoDoc doc, RunMode mode)
{
// select a surface
var gs = new GetObject();
gs.SetCommandPrompt("select surface");
gs.GeometryFilter = ObjectType.Surface;
gs.DisablePreSelect();
gs.SubObjectSelect = false;
gs.Get();
if (gs.CommandResult() != Result.Success)
return gs.CommandResult();
// get the selected face
var face = gs.Object(0).Face();
if (face == null)
return Result.Failure;
// pick a point on the surface. Constain
// picking to the face.
var gp = new GetPoint();
gp.SetCommandPrompt("select point on surface");
gp.Constrain(face, false);
gp.Get();
if (gp.CommandResult() != Result.Success)
return gp.CommandResult();
// get the parameters of the point on the
// surface that is clesest to gp.Point()
double u, v;
if (face.ClosestPoint(gp.Point(), out u, out v))
{
var direction = face.NormalAt(u, v);
if (face.OrientationIsReversed)
direction.Reverse();
RhinoApp.WriteLine(
string.Format(
"Surface normal at uv({0:f},{1:f}) = ({2:f},{3:f},{4:f})",
u, v, direction.X, direction.Y, direction.Z));
}
return Result.Success;
}
}
}Python
import rhinoscriptsyntax as rs
from scriptcontext import *
import Rhino
from Rhino.Commands import Result
def RunCommand():
# select a surface
gs = Rhino.Input.Custom.GetObject()
gs.SetCommandPrompt("select surface")
gs.GeometryFilter = Rhino.DocObjects.ObjectType.Surface
gs.DisablePreSelect()
gs.SubObjectSelect = False
gs.Get()
if gs.CommandResult() != Result.Success:
return gs.CommandResult()
# get the selected face
face = gs.Object(0).Face()
if face == None:
return
# pick a point on the surface. Constain
# picking to the face.
gp = Rhino.Input.Custom.GetPoint()
gp.SetCommandPrompt("select point on surface")
gp.Constrain(face, False)
gp.Get()
if gp.CommandResult() != Result.Success:
return gp.CommandResult()
# get the parameters of the point on the
# surface that is clesest to gp.Point()
b, u, v = face.ClosestPoint(gp.Point())
if b:
dir = face.NormalAt(u, v)
if face.OrientationIsReversed:
dir.Reverse()
print "Surface normal at uv({0:f},{1:f}) = ({2:f},{3:f},{4:f})".format(
u, v, dir.X, dir.Y, dir.Z)
if __name__ == "__main__":
RunCommand()Supported in: 6.0.16224.21491, 5D58w