ClosestPoint in cpython, rhinoinside

Rhino Developer
1

I am not able to use the method ClosestPoint for a crv

crv.ClosestPoint(crv.PointAtEnd,0.0)

Returns typeerror:

"

TypeError Traceback (most recent call last)
in
----> 1 line.ClosestPoint(line.PointAtEnd,0.0)

TypeError: No method matches given arguments for ClosestPoint

"

This may be related to the “out double t” definition?

from RhinoCommon API description:
public bool ClosestPoint(
Point3d testPoint,
out double t
)

image
image.png1155×551 22.2 KB

2

Hi @mads,

Let me know of this sample helps:

import rhinoinside
rhinoinside.load()
import Rhino
import System  # pip install pythonnet

pt0 = Rhino.Geometry.Point3d(0.0, 0.0, 0.0)
pt1 = Rhino.Geometry.Point3d(5.0, 5.0, 0.0)
line_curve = Rhino.Geometry.LineCurve(pt0, pt1)

# When calling .NET methods have return a value as an 'out' parameter,
# you need to pass as many arguments as the method requires.
# Since the concept of out arguments (or passed by reference)
# does not apply to Python, the trick is to pass some dummy arguments
# of the expected type.
dummy_out = System.Double(0.0)
rc, real_out = line_curve.ClosestPoint(pt1, dummy_out, 0.0)
if rc:
    print(real_out)

– Dale

1 Like
3

Thanks Dale, that worked perfectly.