LineDream is a generative art library for Python. It is heavily influenced by P5 and Processing. However, it takes a more object oriented approach, with less global state in regards to styling and transformations.

The current output target is SVG. As this provides a robust output set for vector graphics. There is not yet support for a draw loop - it is single frame output, but you could use a loop to simulate this. There are future plans to implement an OpenGL render window.

LineDream library was originally created to make art for a pen plotter, however, the inner object structure could be applied to many different rendering platforms.

Installation

pip install LineDream

Documentation

https://linedream.marcrleonard.com/documentation/

Example

import random
from LineDream import Line, Canvas, Rectangle, Square, Ellipse, Point, Circle, CircleMath, TextLine

Canvas.width=900
Canvas.height=500
Canvas.background_color='black'

for pp in range(100):
	x = random.randint(0, Canvas.width)
	y = random.randint(0, 400)

	coords = (x,y)
	p = Point(*coords)

	p.stroke_color= 'white'

c_size = 180

circle_center = Canvas.width/2, Canvas.height+c_size/2
c = Circle(*circle_center, 180)
c.stroke_color='white'

c = Circle(*circle_center, 200)
c.stroke_color='white'

c = Circle(*circle_center, 220)
c.stroke_color='white'

long=True
for degrees in range(360,180,-10):

	dist_from_circle = 250

	line_len = 40
	if long:
		line_len = 100
		long=False
	else:
		long=True

	d_x_s, d_y_s = CircleMath.distance_to_coords(degrees, dist_from_circle)
	x1 = circle_center[0] + d_x_s
	y1 = circle_center[1] + d_y_s

	d_x, d_y = CircleMath.distance_to_coords(degrees, dist_from_circle + line_len)
	x2 = circle_center[0] + d_x
	y2 = circle_center[1] + d_y

	Line([(x1,y1), (x2,y2)], stroke_color='white')

# EXPERIMENTAL
tt = TextLine('LineDream', kerning=10, stroke_color='white', stroke_width=2)
tt.transform(100, 100)
tt.scale(1.4)

Canvas.save(f'example.svg')

Custom LineDream Shapes

import math
from LineDream.primitives.BaseShape import BaseShape

class Hexagon(BaseShape):

    def __init__(self, c_x, c_y, radius, **kwargs):
        super().__init__(_close_path=True, **kwargs)

        num_points = 6

        # Calculate the angle between each point
        angle_step = 2 * math.pi / num_points

        for i in range(num_points):
            angle = i * angle_step
            x = c_x + radius * math.cos(angle)
            y = c_y + radius * math.sin(angle)
            self.add_vertex(x, y)


if __name__ == "__main__":
    from LineDream import Canvas

    Canvas.width=356
    Canvas.height=276
    Canvas.units = "mm"
    Canvas.background_color = "beige"

    # Add a Hexagon in the middle of canvas with a radius of 50
    Hexagon(Canvas.width/2, Canvas.height/2, 50, )

    Canvas.save('', open_viewer=True)

Todos:

• Better document colors/opacity/styles for the SVG
• Add 'tag' notion for lines
• Add Group to the example

---

Development

Installation for Development

# Clone the repository
git clone https://github.com/marcrleonard/LineDream.git
cd LineDream

# Install in editable mode with dev dependencies
pip install -e ".[dev]"

Running Tests

# Run tests locally
pytest

# Run tests with verbose output
pytest tests/ -v

# Run tests across multiple Python versions (3.9, 3.10, 3.11, 3.12)
tox

# Run tests with coverage report
tox -e coverage

Building and Publishing

# Build the package
python -m build

# Upload to PyPI (requires twine and PyPI credentials)
twine upload dist/*

# Or upload to TestPyPI first
twine upload --repository testpypi dist/*

Project Structure

All package metadata and dependencies are defined in pyproject.toml following modern Python packaging standards (PEP 517/518).