NodeBox for OpenGL is a free, cross-platform library for generating 2D animations with Python programming code.
NodeBox for OpenGL
NodeBox for OpenGL is a Python module for creating 2D interactive visuals using OpenGL. It is based on the command set of the classic NodeBox for Mac OS X (http://nodebox.net). It has support for Bezier paths, text, image filters (blur, bloom, …), offscreen rendering, animation & motion tweening, and simple 2D physics. Its purpose is to implement a small game engine for “City In A Bottle” (http://cityinabottle.org).
BSD, see LICENSE.txt for further details.
NodeBox for OpenGL is built on the excellent Pyglet module. It works on all platforms if you have Python and Pyglet installed. Note: on Mac OS 10.5, Python is already installed. On Mac OS X 10.6+ (Snow Leopard), you need to install a 32-bit version of Python (Pyglet won’t work as expected with the preinstalled 64-bit version).
- Python 2.5-6 : an installer can be downloaded from http://www.python.org/download/
- Pyglet 1.4+ : an installer can be downloaded from http://www.pyglet.org/
Your video hardware needs support for OpenGL 2.0. If this is not the case, try updating to a new driver.
To be able to import NodeBox in your scripts, Python needs to know where the module is located. There are three basic ways to accomplish this:
- Put the nodebox/ folder in the same folder as your script.
- Put the nodebox/ folder in the standard location for modules so it is available to all scripts. The standard location depends on your operating system, for example: /Library/Python/2.5/site-packages/ on Mac, /usr/lib/python2.5/site-packages/ on Unix, c:python25Libsite-packageson Windows.
- In your script, add the location of NodeBox to sys.path, before importing it: >>> MODULE = ‘/users/tom/python/nodebox’ >>> import sys; if MODULE not in sys.path: sys.path.append(MODULE) >>> import nodebox
If you get an “import pyglet” error, make sure that Pyglet is installed in site-packages/ too.
Binaries: NodeBox contains C extensions for faster mathematics. These are precompiled for Mac, on other systems you need to execute “python setup.py” in nodebox/ext/ manually. Psyco (http://psyco.sourceforge.net/) can boost performance as well (if you use a 32-bit Python). A version precompiled for Mac is included in nodebox/ext/.
- For users coming from NodeBox for Mac OS X, or NodeBox 2: this NodeBox for OpenGL does not have a built-in code editor. You can use the IDLE editor bundled with Python. On Mac OS X, we prefer TextMate (http://macromates.com).
- From the command line, you can run a script with: python example.py (or command-R in TextMate)
- This will open an application window with the output of your script.
Here is a simple NodeBox script:
>>> from nodebox.graphics import * >>> def draw(canvas): >>> canvas.clear() >>> translate(250, 250) >>> rotate(canvas.frame) >>> rect(x=-50, y=-50, width=100, height=100) >>> canvas.size = 500, 500 >>> canvas.run(draw)
It imports the nodebox.graphics module with the standard set of drawing commands. It defines a draw() function and attaches it to the canvas, so that it will be drawn each animation frame. It opens the main application window with canvas.run().
Contributing authors: - Lieven Menschaert - Giorgio Olivero
City In A Bottle: - Nicolas Marinus - Ludivine Lechat - Tim Vets - Frederik De Bleser - Tom De Smedt
Copyright (c) 2008 City In A Bottle
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