VolumeManager with "ValueError: Please set the number of control points on the u-, v- and w-directions"

[JJ]

Hi,

I'm trying to use a  volume. I follow Doc on https://nurbs-python.readthedocs.io/en/latest/module_cpmanager.html

but I got "ValueError: Please set the number of control points on the u-, v- and w-directions". How can I set the number of control points on directions?
Here is the code:

from geomdl import BSpline

from geomdl import control_points

# Number of control points in all parametric dimensions

size_u = 5

size_v = 3

size_w = 2

# Create control points manager

points = control_points.VolumeManager(size_u, size_v, size_w)

pt = [10, 15, 12]

# Set control points

for u in range(size_u):

for v in range(size_v):

for w in range(size_w):

# 'pt' is the control point, e.g. [10, 15, 12]

points.set_ctrlpt(pt, u, v, w)

# Create spline geometry

volume = BSpline.Volume()

# Set control points

volume.ctrlpts = points.ctrlpts

Thanks!

[Onur Bingol]

You need to set u,v,w sizes and the knot vectors on the "BSpline.Volume" object. VolumeManager is only for control points, and I agree the naming is a bit off and the example seems to assume just a bit more from the users.

Thanks for bringing this issue to my attention. I'll add this doc fix to the todo list.

Onur R. Bingol, PhD

con...@onurbingol.net | https://onurbingol.net 

---- On Tue, 08 Nov 2022 11:55:26 -0800 JJ <colab.o...@gmail.com> wrote ---

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