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.

<< November 05 >>

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 itís 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.        

Hit Counter