def __init__(self, parent=None):
super(Window, self).__init__(parent)
# Create a NURBS surface instance
self.surf = ns.Surface()
# Set up the NURBS surface
self.surf.read_ctrlpts("data.txt")
self.surf.degree_u = 3
self.surf.degree_v = 3
self.surf.knotvector_u = [0.0, 0.0, 0.0, 0.0, 1.0, 2.0, 3.0, 3.0, 3.0, 3.0]
self.surf.knotvector_v = [0.0, 0.0, 0.0, 0.0, 1.0, 2.0, 3.0, 3.0, 3.0, 3.0]
# Calculate surface points
self.surf.evaluate_rational()
self.coeff = 10
# A figure instance to plot on
self.figure = plot.figure(figsize=(10.67, 8), dpi=96)
# This is the Canvas Widget that displays the `figure`
# it takes the `figure` instance as a parameter to __init__
self.canvas = FigureCanvas(self.figure)
# This is the Navigation widget
# it takes the Canvas widget and a parent
self.toolbar = NavigationToolbar(self.canvas, self)
# Just some slider connected to `plot` method
self.slider = QSlider(Qt.Horizontal)
self.slider.setMinimum(1)
self.slider.setMaximum(36)
self.slider.setValue(10)
self.slider.valueChanged.connect(self.plot)
self.label = QLabel("Quality of drawing slider (left is best right is worst)")
self.label.setAlignment(Qt.AlignCenter)
# Set the layout
layout = QVBoxLayout()
layout.addWidget(self.toolbar)
layout.addWidget(self.canvas)
layout.addWidget(self.label)
layout.addWidget(self.slider)
self.setLayout(layout)
# -*- coding: utf-8 -*-
"""
Examples for the NURBS-Python Package
Released under MIT License
Developed by Onur Rauf Bingol (c) 2016-2017
"""
from nurbs import Surface as ns
from nurbs import utilities as utils
from matplotlib import pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
# Create a NURBS surface instance
surf = ns.Surface()
# Set up the NURBS surface
surf.read_ctrlpts("data\CP_Surface2.txt")
surf.degree_u = 3
surf.degree_v = 3
surf.knotvector_u = utils.knotvector_autogen(surf.degree_u, 6)
surf.knotvector_v = utils.knotvector_autogen(surf.degree_v, 6)
# Evaluate surface
surf.evaluate_rational()
# Calculate 1st order surface derivative at the given u and v
u = 0.2
v = 0.9
surftan = surf.tangent(u, v)
print("* Surface point at u = %.2f and v = %.2f is (%.2f, %.2f, %.2f)" % (u, v, surftan[0][0], surftan[0][1], surftan[0][2]))
Up.calculate_basis_functions()
Np = Up.get_basis_functions()
# Knot vector and basis functions for V direction
Uq = Knot.Knot(dimension, degree_q, num_points_v)
Uq.create_knot_vector()
# Display and get knot vector V
print('Knot vector V:')
knot_vector_q = Uq.get_knot_vector(True)
Uq.calculate_spans()
spans_q = Uq.get_spans()
Uq.calculate_basis_functions()
Nq = Uq.get_basis_functions()
# Surface point operations
S = Surface.Surface(degree_p, degree_q, Pv, Np, Nq, spans_p, spans_q)
S.calculate()
S_points = S.get_result()
S.write()
# Get surface points
x_coords = []
y_coords = []
z_coords = []
for s in S_points:
x_coords.append(s['x'])
y_coords.append(s['y'])
z_coords.append(s['z'])
#
# Knot insertion