Geoff Hagopian's Sabbatical Log

I invite readers to investigate my progressing sabbatical study.

Click on the the red dates: these are hyperlinks to the log entries.

I invite readers to investigate my progressing sabbatical study.

Click on the the red dates: these are hyperlinks to the log entries.

Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |

30 | 31 | 1 | 2 | 3 | 4 | 5 |

Windows openGL programming for mapping textures to surface of a cube. | A GDI application from the Neon Helium tutorials site. | |||||

6 | 7 | 8 | 9 | 10 | 11 | 12 |

We begin a sojourn into the land of spline. Lots of nitty gritty derivation here. | A continuation of 3D params of 11/9 and then on to JSTOR CMJ article, Simpson & bad example... | Splines III, where we rediscover the joys of degrees of freedom and discover root of badness in too biggerness. | Splines IV, NLib & MatLab. Using quad to measure total curvature and comparing 8th degree interpolant with spline. | |||

13 | 14 | 15 | 16 | 17 | 18 | 19 |

Splines V, how imposing 2nd order continuity condition leads to tridiagonal system. Formulas for coefficients. A TI89 example implementation. | Splines VI, A MatLab rendition of the TI89 example followed by MSJ Mountain data--nice!! |
Splines VII, Dissecting the NLib/MatLab spline software and reconstructing c++ code. | Splines VIII, a fairly thorough description of the c++ spline code I cobbled together-followed by more total curvature analysis. | Splines IX, nailing down the Simpson connection with a symmetric 7-point set. Both TI89 and MatLab are used. | Spline X, An example to motivate and illustrate the Hildebrand interpolative parameterization. MatLab code. |
Splines XI A spline with irregular spacing. Large sparse (but not tridiagonal matrix) system is solved in Matlab. |

20 | 21 | 22 | 23 | 24 | 25 | 26 |

Augmenting an irregular spline to show it’s inconstant...and the derivation of the Hildebrand parameterization formulas. | An example in MatLab illustrating a Hildebrand blob. It's a closed curve! | A more shapely blob and glob rendering using arcs of circles with MatLab. | First entry on the chemical words 3X3 puzzle problem. | Program to produce solutions to the chemical puzzle - that's an afternoon's work, for sure! | Chemical words puzzle solutions. | The first draft of the game I wrote based
on the NPR puzzle discussed last several days. Big constructor action. |

27 | 28 | 29 | 30 | 1 | 2 | 3 |

Pixels and bitmaps. | Bitmaps, OpenGL format, DIBs, CGLs, GDIs, HDACHEs. |