Curve Frame At

@gianfranco74 wrote:

Hi All, Rhino 6 release 14 common . In some closed planar curves the method FrameAt passing the start point parameter gives a plane that is perpendicular to the plane of the curve. Why? See the attachment
curve frame at.3dm (283.2 KB)

1. curve details

ID: 755d3d76-78f5-4c41-9c9c-7bada575ea00 (4393)
Object name: (not named)
Layer name: Predefinito
Render Material:
source = from layer
index = -1

Geometry:
Valid curve.
Closed NURBS curve
start = (0,5.25011e-17,-3.40095e-33)
end = (0,5.25011e-17,-3.40095e-33)
degree = 3
control points: non-rational, count=15 (1 duplicate)
knots: uniform (delta=1), domain = -12 to -0
clamped at start and end
Geometry UserData:
UserData ID: 3B7FB506-437C-431e-B1D7-93C4CBFF417F
Plug-in: Rhino
description: Gumball grip frame
saved in file: yes
copy count: 26

2. curve details

ID: 68cd0fef-8028-451f-858d-3ed99783d522 (4373)
Object name: (not named)
Layer name: Predefinito
Render Material:
source = from layer
index = -1

Geometry:
Valid curve.
Periodic NURBS curve
start = (0,-5.4255,-0.160673)
end = (0,-5.4255,-0.160673)
degree = 3
control points: non-rational, count=23 (3 duplicates)
knots: uniform (delta=0.927178), domain = -18.5436 to -0
Geometry UserData:
UserData ID: 3B7FB506-437C-431e-B1D7-93C4CBFF417F
Plug-in: Rhino
description: Gumball grip frame
saved in file: yes
copy count: 8

Posts: 1

Participants: 1

Read full topic