A Python package for creative coding on the web.
Project description
proceso
A Python package for creative coding on the web.
proceso provides a Pythonic interface to the p5.js library. The package is designed for Pyodide-based environments including PyScript and (soonish) JupyterLite. Similar to py5, proceso's goal is to integrate p5.js into the Python ecosystem with thoughtful choices about how to do so in the browser.
Here is an example of how to create a proceso sketch with PyScript:
<!DOCTYPE html>
<html lang="en-us">
<head>
<title>My Sketch</title>
<meta charset="utf-8" />
<link rel="stylesheet" href="https://pyscript.net/releases/2023.03.1/pyscript.css" />
<script defer src="https://pyscript.net/releases/2023.03.1/pyscript.js"></script>
<link rel="stylesheet" href="style.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.6.0/p5.min.js"></script>
<py-config>
packages = ["numpy", "proceso"]
</py-config>
</head>
<body>
<main></main>
<py-script src="sketch.py"></py-script>
</body>
</html>
Static Sketches
Similar to Processing, proceso enables beginners to start programming with "static sketches" before introducing animation and interaction. The following example draws a few shapes and a flower on the screen.
from proceso import Sketch
p5 = Sketch()
# Create the canvas
p5.create_canvas(720, 400)
p5.background(200)
# Set colors
p5.fill(204, 101, 192, 127)
p5.stroke(127, 63, 120)
# A rectangle
p5.rect(40, 120, 120, 40)
# An ellipse
p5.ellipse(240, 240, 80, 80)
# A triangle
p5.triangle(300, 100, 320, 100, 310, 80)
# A design for a simple flower
p5.translate(580, 200)
p5.no_stroke()
for _ in range(10):
p5.ellipse(0, 30, 20, 80)
p5.rotate(p5.PI / 5)
Active Sketches
proceso's "active sketches" provide the run_sketch() method to handle initialization, looping, and events. The sketch below animates a ball bouncing around the canvas and clears the canvas when a mouse press is detected.
from proceso import Sketch
p5 = Sketch()
pos = p5.Vector(200, 200)
vel = p5.Vector.random(2)
r = 25
def setup():
p5.create_canvas(400, 400)
p5.background("#1e90ff")
p5.fill("orchid")
p5.stroke(255)
def draw():
global pos, vel
pos += vel
p5.circle(pos.x, pos.y, 2 * r)
if pos.x < r or pos.x > p5.width - r:
vel.x *= -1
if pos.y < r or pos.y > p5.height - r:
vel.y *= -1
if p5.is_mouse_pressed == True:
p5.background("dodgerblue")
p5.run_sketch(setup=setup, draw=draw)
Roadmap
- Improve documentation
- Fix known bugs
- Finish API
- Support JupyterLite
- Translate p5.js test suite?
- Add CLI with hot reload
- Add bindings for p5.js addon libraries
Acknowledgements
- proceso is, first and foremost, an interface to the p5.js library. Nearly all of the package's documentation and examples are adapted from their p5.js counterparts. Portions of the source code are also adapted from the original JavaScript implementation.
- The
Vectorclass is lovingly borrowed from py5 as are most of py5's naming conventions. - Basthon, Py5.js, and pyp5js all pointed the way.
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