M_Rhino_Geometry_Curve_TryGetCircle - mcneel/rhinocommon-api-docs GitHub Wiki
Try to convert this curve into a circle using RhinoMath.ZeroTolerance.
Namespace: Rhino.Geometry
Assembly: RhinoCommon (in RhinoCommon.dll) Version: Rhino 6.0
C#
public bool TryGetCircle(
out Circle circle
)VB
Public Function TryGetCircle (
<OutAttribute> ByRef circle As Circle
) As Boolean
- circle
- Type: Rhino.Geometry.Circle
On success, the Circle will be filled in.
Type: Boolean
true if the curve could be converted into a Circle.
VB
Imports Rhino
Imports Rhino.Geometry
Imports Rhino.Commands
Imports Rhino.Input.Custom
Imports Rhino.DocObjects
Namespace examples_vb
Public Class CustomGeometryFilterCommand
Inherits Command
Private _tolerance As Double
Public Overrides ReadOnly Property EnglishName() As String
Get
Return "vbCustomGeometryFilter"
End Get
End Property
Protected Overrides Function RunCommand(doc As RhinoDoc, mode As RunMode) As Result
_tolerance = doc.ModelAbsoluteTolerance
' only use a custom geometry filter if no simpler filter does the job
' only curves
Dim gc = New GetObject()
gc.SetCommandPrompt("select curve")
gc.GeometryFilter = ObjectType.Curve
gc.DisablePreSelect()
gc.SubObjectSelect = False
gc.[Get]()
If gc.CommandResult() <> Result.Success Then
Return gc.CommandResult()
End If
If gc.[Object](0).Curve() Is Nothing Then
Return Result.Failure
End If
Rhino.RhinoApp.WriteLine("curve was selected")
' only closed curves
Dim gcc = New GetObject()
gcc.SetCommandPrompt("select closed curve")
gcc.GeometryFilter = ObjectType.Curve
gcc.GeometryAttributeFilter = GeometryAttributeFilter.ClosedCurve
gcc.DisablePreSelect()
gcc.SubObjectSelect = False
gcc.[Get]()
If gcc.CommandResult() <> Result.Success Then
Return gcc.CommandResult()
End If
If gcc.[Object](0).Curve() Is Nothing Then
Return Result.Failure
End If
Rhino.RhinoApp.WriteLine("closed curve was selected")
' only circles with a radius of 10
Dim gcc10 = New GetObject()
gcc10.SetCommandPrompt("select circle with radius of 10")
gc.GeometryFilter = ObjectType.Curve
gcc10.SetCustomGeometryFilter(AddressOf CircleWithRadiusOf10GeometryFilter)
' custom geometry filter
gcc10.DisablePreSelect()
gcc10.SubObjectSelect = False
gcc10.[Get]()
If gcc10.CommandResult() <> Result.Success Then
Return gcc10.CommandResult()
End If
If gcc10.[Object](0).Curve() Is Nothing Then
Return Result.Failure
End If
Rhino.RhinoApp.WriteLine("circle with radius of 10 was selected")
Return Result.Success
End Function
Private Function CircleWithRadiusOf10GeometryFilter(rhObject As Rhino.DocObjects.RhinoObject, geometry As GeometryBase, componentIndex As ComponentIndex) As Boolean
Dim isCircleWithRadiusOf10 As Boolean = False
Dim circle As Circle
If TypeOf geometry Is Curve AndAlso TryCast(geometry, Curve).TryGetCircle(circle) Then
isCircleWithRadiusOf10 = circle.Radius <= 10.0 + _tolerance AndAlso circle.Radius >= 10.0 - _tolerance
End If
Return isCircleWithRadiusOf10
End Function
End Class
End NamespaceC#
using Rhino;
using Rhino.Geometry;
using Rhino.Commands;
using Rhino.Input.Custom;
using Rhino.DocObjects;
namespace examples_cs
{
public class CustomGeometryFilterCommand : Command
{
private double m_tolerance;
public override string EnglishName { get { return "csCustomGeometryFilter"; } }
protected override Result RunCommand(RhinoDoc doc, RunMode mode)
{
m_tolerance = doc.ModelAbsoluteTolerance;
// only use a custom geometry filter if no simpler filter does the job
// only curves
var gc = new GetObject();
gc.SetCommandPrompt("select curve");
gc.GeometryFilter = ObjectType.Curve;
gc.DisablePreSelect();
gc.SubObjectSelect = false;
gc.Get();
if (gc.CommandResult() != Result.Success)
return gc.CommandResult();
if (null == gc.Object(0).Curve())
return Result.Failure;
Rhino.RhinoApp.WriteLine("curve was selected");
// only closed curves
var gcc = new GetObject();
gcc.SetCommandPrompt("select closed curve");
gcc.GeometryFilter = ObjectType.Curve;
gcc.GeometryAttributeFilter = GeometryAttributeFilter.ClosedCurve;
gcc.DisablePreSelect();
gcc.SubObjectSelect = false;
gcc.Get();
if (gcc.CommandResult() != Result.Success)
return gcc.CommandResult();
if (null == gcc.Object(0).Curve())
return Result.Failure;
Rhino.RhinoApp.WriteLine("closed curve was selected");
// only circles with a radius of 10
var gcc10 = new GetObject();
gcc10.SetCommandPrompt("select circle with radius of 10");
gc.GeometryFilter = ObjectType.Curve;
gcc10.SetCustomGeometryFilter(CircleWithRadiusOf10GeometryFilter); // custom geometry filter
gcc10.DisablePreSelect();
gcc10.SubObjectSelect = false;
gcc10.Get();
if (gcc10.CommandResult() != Result.Success)
return gcc10.CommandResult();
if (null == gcc10.Object(0).Curve())
return Result.Failure;
RhinoApp.WriteLine("circle with radius of 10 was selected");
return Result.Success;
}
private bool CircleWithRadiusOf10GeometryFilter (Rhino.DocObjects.RhinoObject rhObject, GeometryBase geometry,
ComponentIndex componentIndex)
{
bool is_circle_with_radius_of10 = false;
Circle circle;
if (geometry is Curve && (geometry as Curve).TryGetCircle(out circle))
is_circle_with_radius_of10 = circle.Radius <= 10.0 + m_tolerance && circle.Radius >= 10.0 - m_tolerance;
return is_circle_with_radius_of10;
}
}
}Python
import rhinoscriptsyntax as rs
from scriptcontext import *
import Rhino
def circleWithRadiusOf10GeometryFilter (rhObject, geometry, componentIndex):
isCircleWithRadiusOf10 = False
c = rs.coercecurve(geometry)
if c:
b, circle = c.TryGetCircle()
if b:
isCircleWithRadiusOf10 = circle.Radius <= 10.0 + Rhino.RhinoMath.ZeroTolerance and circle.Radius >= 10.0 - Rhino.RhinoMath.ZeroTolerance
return isCircleWithRadiusOf10
def RunCommand():
# only use a custom geometry filter if no simpler filter does the job
# for curves - only a simple filter is needed
if rs.GetObject("select curve", rs.filter.curve): #Rhino.DocObjects.ObjectType.Curve):
print "curve vas selected"
# for circles with a radius of 10 - a custom geometry filter is needed
if rs.GetObject("select circle with radius of 10", rs.filter.curve, False, False, circleWithRadiusOf10GeometryFilter):
print "circle with radius of 10 was selected"
if __name__=="__main__":
RunCommand()Supported in: 6.0.16224.21491, 5D58w