bezier 0.3.0

Helper for Bézier Curves, Triangles, and Higher Order Objects

Helper for Bézier Curves, Triangles, and Higher Order Objects

Install

$ pip install --upgrade bezier

Getting Started

For example, to create a curve:

>>> nodes1 = np.array([
...     [0.0, 0.0],
...     [0.5, 1.0],
...     [1.0, 0.0],
... ])
>>> curve1 = bezier.Curve(nodes1, degree=2)

The intersection (points) between two curves can also be determined:

>>> nodes2 = np.array([
...     [0.0 ,  0.0],
...     [0.25,  2.0],
...     [0.5 , -2.0],
...     [0.75,  2.0],
...     [1.0 ,  0.0],
... ])
>>> curve2 = bezier.Curve.from_nodes(nodes2)
>>> intersections = curve1.intersect(curve2)
>>> intersections
array([[ 0.311...,  0.428...],
       [ 0.688...,  0.428...],
       [ 0.      ,  0.      ],
       [ 1.      ,  0.      ]])

and then we can plot these curves (along with their intersections):

>>> import matplotlib.pyplot as plt
>>> import seaborn
>>>
>>> ax = curve1.plot(num_pts=256)
>>> curve2.plot(num_pts=256, ax=ax)
>>> ax.plot(intersections[:, 0], intersections[:, 1],
...         marker='o', linestyle='None', color='black')
>>> ax.axis('scaled')
>>> ax.set_xlim(-0.125, 1.125)
>>> ax.set_ylim(-0.0625, 0.625)
>>> plt.show()

Development

To work on adding a feature or to run the functional tests, See the DEVELOPMENT doc for more information on how to get started.

License

Apache 2.0 - See the LICENSE for more information.