Numerical Recipes: The Art of Scientific Computing - Simulated Annealing
(and other programming topics/tutorials)

Traveling Salesman Itinerary before Simulated Annealing Path produced by random x,y data points generated by procedure ldAnlTestData (nCity, x, y, mu, iOrder) in D module dnrprocs. Plotted by function plotPoints (hGraph, hdc, lpPoint, nNodes, gx1, gx2, ix, gy1, gy2, iy, iOrder, grX, grY, WinNrmlAlgNrml) in D module dnrprocs. Both graphs and user interface (below right) are from wmath.exe (module wmath; source code wmath.d) From the user interface, command File, Anneal calls dANNEAL (...) in module dnrprocs. From the same user interface, command View, Graph calls ViewGraph (hWnd) in module wmath; ViewGraph (hWnd) windows callback procedure GraphProc(...) calls plotPoints (...).

(module dnrprocs plotting procedures have been upgraded to include axis)

Traveling Salesman Itinerary after Simulated Annealing Same x,y data points reconfigured by simulated annealing procedure dANNEAL (nCity, x, y, mu, iOrder, path, eCost, iErr, IOflag, hWnd) in D module dnrprocs, resulting in a much shorter path. Plotted by function plotPoints (hGraph, hdc, lpPoint, nNodes, gx1, gx2, ix, gy1, gy2, iy, iOrder, grX, grY, WinNrmlAlgNrml) in D module dnrprocs. ViewGraph (hWnd) is an example of a popup window.

wmath.exe User Interface more advanced and functional version of Simulated Annealing Demonstration Module wmath uses two windows and two windows callback procedures; one for the user interface at right, the other for displaying the simple graphs above right. Written in D.

Has rudimentary Command Line Parameter Parser (input file name, number of nodes).  D module CmdLine.d calls procedures in Object Pascal Library ALlazrs, which uses Lazarus unit NumRecGlbl. Calls module hedito function hEditPopUpMenu (...) for right click short cut popup menu for basic clipboard Cut, Copy, Paste, Delete, Select All, array element Insert and Delete array element compile with: dmd wmath.d dnrprocs.lib sttstcs.lib cmdline.lib hedtio.lib hwndio.lib win.def [see DMD D .DLL calling FORTRAN .DLL (D file) (link below), Compiling/Linking, step 7, for information on win.def]

Source file containing port from FORTRAN to XBLite of Numerical Recipes' subprogram CRANK (...) (returns array of ranks of an input integer array).  Also has generic text to numeric conversion utility (can handle decimal, hexadecimal, and octal formats), Windows API child create (has been successfully called from a D Windows program)  &  I/O calls / utilities (some taken from demo programs and modified).  Many of these functions now return $$TRUE when successful, $$FALSE upon failure.  Was part of (so far unsuccessful) project of Fujitsu COBOL 3.0 main program calling XBLite functions.  Compiles into a .dll (see Compiling XBasic Lite Library (DLL) for general compiling information - uses example of D command console program calling XBLite Library)

Additional Programming Topics

• Artificial Life - life-like patterns emerging in cellular automata and related arrays.
• Strange Attractors - An attractor of a chaotic system, the exact behavior in the system never repeats; demonstrates
  sensitive dependence on initial conditions; fractal structure.
• Bifurcations - emergence of a new attractor(s) in a dynamic, complex system that occurs when some parameter reaches
  a critical threshold value

Dawkins8 Biomorph (Artificial Life) (Tree Height : 60;   Branch Angle : 339°;  Branch Length : 9) Data produced by procedure DAWKINS (hWindow, hEditOutput, ix, iy, alpha, treeHeight, branchAngle, branchLength, biQuadSymtryInd, nPts, iErr) in Object Pascal Library dawkins8.dll (callable by both D and Pascal Windows main programs; Pascal version also demonstrates appending text to a windows edit control) Lines plotted by function plotLines2 (hGraph, hdc, &Point, n, gx1, gx2, ix, gy1, gy2, iy, grX, grY, WinNrmlAlgNrml) in D module dnrprocs.

Include file genetyp.inc, Object Pascal Librarys genecode.pas and dawkins8.pas are major rewrites from Rietman, Edward (1994) Genesis Redux: Experiments Creating Artificial Life; unfortunately, to prevent any intellectual property violations, neither genecode.pas or dawkins8.pas are available for download from this site. Called by wlife.d main program (uses two windows and two windows callback procedures, similar to wmath.d above); also demonstrates creating Windows Tool Tips via calls to CreateToolTip (...) in D module hedtio.

D module alife (Strange Attractors & Bifurcations) Port of several stand-alone GW-BASIC programs from E. Rietman (1993) Creating Artificial Life : Self-Organization to D .dll alife.d : Artificial Life D source file, compiles into .dll.  Includes Brusselator limit cycle, Iterated Map, Phase Diagram, Rayleigh, Rossler, and van der Pol equation. Requires module dnrprocs. alife.di : D Interface file compile with: dmd -c alife.d -g dmd alife.obj alife.def -g implib /noi /system alife.lib alife.dll van der Pol equation (nonlinear electric circuit) plot produced by module dnrprocs function plotPixels(hGraph, hdc, rgb, n, gx1, gx2, ix, gy1, gy2, iy, grX, grY, WinNrmlAlgNrml) Called by main D module wlife (see above).

Uses D module CmdLine.d for Command Line Parameter Parsing Compile and link D module wlife with: dmd wlife.d alife.lib dnrprocs.lib hedtio.lib CmdLine.lib dawkins8.lib win.def

Lazarus, Pascal, FORTRAN, D, and Model Rockets Several components of a software system to input and analyze a multi-stage model rocket design and flight.  Includes downloads of some source files to accompany tutorials.  Portions of system still being developed; updated source files will be uploaded as completed and tested. While researching Drag Coefficients, came across both MODEL ROCKET SIMULATION WITH DRAG ANALYSIS (Brent_Cannon-Capstone.pdf) and OpenRocket technical documentation.  This project is not a port from either; both sources did provide some clarification.

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