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View Code? Open in Web Editor NEWNURBS python object-oriented library
License: GNU General Public License v3.0
NURBS python object-oriented library
License: GNU General Public License v3.0
The current functions to knot insertion and knot removal works only for a single point and only once per time.
To implement the sum of two different curves:
At the version v1.0.8
, calling degree_increase
or degree_decrease
raises a ValueError
when the parameter times = 0
is given.
It should do nothing in that case.
from compmec.nurbs import Curve
knotvector = (0, 0, 0, 1, 1, 1) # degree 2, npts 3
curve = Curve(knotvector)
curve.degree_increase(0) # Raises ValueError
curve.degree_decrease(0) # Raises ValueError
curve.degree = 2 # Does nothing since degree is already 2
Take the knotvector
from compmec.nurbs import KnotVector
knotvector = (0.0, 0.0, 1.8678173101311735, 1.8678173101311735)
knotvector = KnotVector(knotvector)
knotvector.normalize()
print(knotvector) # (0.0, 0.0, 0.9999999999999999, 0.9999999999999999)
It's expected to get the knotvector (0.0, 0.0, 1.0, 1.0)
Currently, the code accepts only ControlPoints as a vector, but for a single value it should return a value
import numpy as np
U = KnotVector([0, 0, 0, 0.5, 1, 1, 1]) # p = 2, n = 4
N = SplineBaseFunction(U)
P = np.random.rand(4)
C = SplineCurve(N, P)
t = np.linspace(0, 1, 11)
print("C(t),shape =", C(t).shape) # Should be (11,), not (11, 1)
The current code for knot removal of splines works only for degree = 2, 3 and 4.
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