.. _sphx_glr_gallery_api_bbox_intersect.py: =========================================== Changing colors of lines intersecting a box =========================================== The lines intersecting the rectangle are colored in red, while the others are left as blue lines. This example showcases the `intersect_bbox` function. .. image:: /gallery/api/images/sphx_glr_bbox_intersect_001.png :align: center .. code-block:: python import numpy as np import matplotlib.pyplot as plt from matplotlib.transforms import Bbox from matplotlib.path import Path # Fixing random state for reproducibility np.random.seed(19680801) left, bottom, width, height = (-1, -1, 2, 2) rect = plt.Rectangle((left, bottom), width, height, facecolor="#aaaaaa") fig, ax = plt.subplots() ax.add_patch(rect) bbox = Bbox.from_bounds(left, bottom, width, height) for i in range(12): vertices = (np.random.random((2, 2)) - 0.5) * 6.0 path = Path(vertices) if path.intersects_bbox(bbox): color = 'r' else: color = 'b' ax.plot(vertices[:, 0], vertices[:, 1], color=color) plt.show() **Total running time of the script:** ( 0 minutes 0.026 seconds) .. only :: html .. container:: sphx-glr-footer .. container:: sphx-glr-download :download:`Download Python source code: bbox_intersect.py ` .. container:: sphx-glr-download :download:`Download Jupyter notebook: bbox_intersect.ipynb ` .. only:: html .. rst-class:: sphx-glr-signature `Gallery generated by Sphinx-Gallery `_