Variable polyline buffer

Description

variable_polyline_buffer is a Python library for calculating a buffer around a polyline, defining the contours of a line with variable thickness. This function supports various applications in geographical information systems, computer graphics, and spatial analysis where dynamic line thickness is required.

Installation

To install this package, use pip:

pip install variable_polyline_buffer

Usage

Here is a simple example of how to use Variable-Polyline-Buffer:

from variable_polyline_buffer import generate_polyline_buffer
import matplotlib.pyplot as plt

# Example data: coordinates of polyline points and distance for each segment
points = [(0, 0), (2, 0.5), (3, -0.5), (4, 1)]
distances = [1, 0.5, 0.2]  # Thickness of the individual segments

# Generate contours
left_contour, right_contour = generate_polyline_buffer(points, distances)

# Plot the contours
plt.plot([p[0] for p in points], [p[1] for p in points], "C0")
plt.plot([p[0] for p in left_contour], [p[1] for p in left_contour], "k--")
plt.plot([p[0] for p in right_contour], [p[1] for p in right_contour], "k--")
plt.axis("equal")

Replace points and dists with your polyline data and corresponding thicknesses.

Via supplying tuples as dists, one can also generate different thicknesses on the curve's two sides:

points = [(0, 0), (2, 0.5), (3, -0.5), (4, 1)]
distances = [(0.1, 1), (0.1, 0.5), 0.2]

By supplying False as distance, one can taper between segments with different widths:

points = [(0, 0), (1, 0), (2, 0), (3, 0)]
distances = [(0.5, 0), (False, 0), (0.2, 0)]

Requirements

Variable-Polyline-Buffer requires the following Python libraries:

• NumPy

License

This project is licensed under the MIT License.