This video series is intended to document the development from start to finish of a moderately complex program. An open-source, cross-platform, molecular (.pdb file) viewing, slideshow capable program to be precise.

Demonstrates use cases to document some of the requirements of a program.

Here are the links to the software packages mentioned in the video:

In this episode I use my extreme copy and pasting skills to mash other great Python examples into one big combined example of using wxPython, Sizers, and PyOpenGL.

Here I walk through the OpenGL portion of the example code and talk about some of the basics regarding OpenGL.

Here I talk about the examples that are included with PyOpenGL.

In this episode I present and talk about my class diagram.

This video shows the steps to create a new open-source project hosted by Launchpad.net using Bazaar as the version control software.

Here is a link to find the GPL version 3 and info about it: http://www.gnu.org/copyleft/gpl.html

In this episode I go over three classes of code, give a tip on using pageant to automatically load the private key, and improve my batch script controlling Bazaar.

I modify the molecule module a bit to fix a bug having to do with default optional parameters that are declared as lists, tuples, or dictionaries. Also I modify the Bazaar uploading batch script a bit and show how to download the source code from projects on Launchpad using Bazaar.

In this episode I go over the PDB class I wrote for my emol! program.

In this video I talk about some of the history of U.S. copyright law, fair use, and open source licenses.

In this episode I give my fair use justifications for adding example code without a clear license found on websites and in programming documentation to my GPL application. I also add the wxPython code that I had before and throw in a File Open dialog.

I finish up the File Open Dialog and use the returned path to allow the my OpenGL's OnDraw() method to see all the coordinates of a selected PDB file.

Instead of printing the atom's coordinates to the console, we now draw them as spheres on the 3D canvas.

In this episode I talk about the basics of vector math as it applies to 3D programming. I'll be using vector math to properly position the cylinders as bonds in the next episode.

The molecule bonds are drawn as 3D cylinders. glRotate, gluCylinder, and vector math is used.

Often the bond information isn't included in a .pdb file. In this episode I go over the code to calculate those bonds. Also I go over a bugfix to the DrawBond() method from the last episode for when the angle of rotation is 0 or 180 degrees.

I give the atoms some color, talk a bit about OpenGL lighting, and the CPK coloring system for atoms.

I show how to use a wxPython Timer control and use that timer to help automatically rotate my 3D molecule.

I get the slideshow functionality working using a wxPython Select Directory dialog and a new timer control.

In this episode I draw the molecule name on the OpenGL scene and add a checked menu item to toggle that name on and off.

In this episode I center the molecule in case it isn't already centered as well as make a rough calculation of its size. I maintain aspect ratio of the OpenGL scene during screen resizes and adjust the zoom so that both big and small molecules fit into the current view.

SQLite is a database with support built into python 2.5 and greater. It is notable for storing the data into a very small, portable file while using the same basic SQL syntax used by much larger, and not so portable, databases. SQLite has been released to the public domain so there are no licensing issues to worry about when using it.

A python database class for use with SQLite databases.

I created a class that will call my database class with the appropriate SQL commands to retrieve and store my settings data.

Here I start to make use of the settings class I previously made from within my main wxPython code.

Here I add a wxPython dialog and some controls using absolute positioning. The wxPython integer control and others are also discussed. The dialog is currently used to make and save changes to the slideshow delay setting.

Here I save the rest of the settings from the wxPython dialog to the SQLite database. The Slider and Choice wxPython widgets are discussed.

This time we get the rest of the settings from the dialog to be fully enabled within the program rather than merely being able to save themselves to the database. These newly enabled settings are the molecule rotation speed, molecule rotation axis, and slideshow order.

Here I show how to view recent revisions from the Launchpad.net code view page. Then I go over two bug fixes and the new file history feature that was added to the program.

In this episode I switch from developing in Windows XP to developing in Ubuntu Hardy Heron. The requires downloading the libraries my program depends on, downloading bazaar to download and upload my code from launchpad, and importing a new ssh key into launchpad.

In this episode I describe the files and directories that will make up my application once it is complete.

Here I create three additional files that I will be distributing with my application: the man page, the program icon, and the .desktop file so the icon will appear in the menu.