文件列表:

Roamsteps20020818 (0, 2002-08-19)
Roamsteps20020818\buildvc.bat (721, 2002-08-19)
Roamsteps20020818\cleanroamsteps (240, 2002-08-05)
Roamsteps20020818\cleanvc.bat (255, 2002-08-19)
Roamsteps20020818\DIAMONDS.txt (8672, 2002-08-19)
Roamsteps20020818\fly.c (23465, 2002-08-19)
Roamsteps20020818\fly.h (4299, 2002-08-19)
Roamsteps20020818\genroamsteps (378, 2002-08-19)
Roamsteps20020818\genroamsteps_prof (296, 2002-08-11)
Roamsteps20020818\randtab.c (24509, 2002-08-19)
Roamsteps20020818\randtab.h (1733, 2002-08-19)
Roamsteps20020818\RESULTS.txt (623, 2002-08-19)
Roamsteps20020818\roam.h (1369, 2002-08-19)
Roamsteps20020818\roamfly.c (2853, 2002-08-19)
Roamsteps20020818\roamfly1.dsp (4736, 2002-08-19)
Roamsteps20020818\roamfly1.plg (1556, 2002-08-19)
Roamsteps20020818\roamfly2.dsp (4790, 2002-08-19)
Roamsteps20020818\roamfly2.plg (1331, 2002-08-19)
Roamsteps20020818\roamfly3.dsp (4790, 2002-08-19)
Roamsteps20020818\roamfly3.plg (1331, 2002-08-19)
Roamsteps20020818\roamfly4.dsp (4790, 2002-08-19)
Roamsteps20020818\roamfly4.plg (1331, 2002-08-19)
Roamsteps20020818\roamstep1.c (4804, 2002-08-19)
Roamsteps20020818\roamstep2.c (6334, 2002-08-19)
Roamsteps20020818\roamstep3.c (12523, 2002-08-19)
Roamsteps20020818\roamstep4.c (27625, 2002-08-19)
Roamsteps20020818\Roamsteps.dsw (1130, 2002-08-19)
Roamsteps20020818\Roamsteps.ncb (99328, 2002-08-19)
Roamsteps20020818\Roamsteps.opt (64512, 2002-08-19)
Roamsteps20020818\roamtypes.h (5521, 2002-08-19)
Roamsteps20020818\viewpoints (0, 2002-08-19)
Roamsteps20020818\viewpoints\viewpoint0.txt (252, 2002-08-11)
Roamsteps20020818\viewpoints\viewpoint1.txt (245, 2002-08-11)
Roamsteps20020818\viewpoints\viewpoint2.txt (246, 2002-08-11)
Roamsteps20020818\viewpoints\viewpoint3.txt (246, 2002-08-11)
Roamsteps20020818\viewpoints\viewpoint4.txt (247, 2002-08-11)
Roamsteps20020818\viewpoints\viewpoint5.txt (248, 2002-08-11)
Roamsteps20020818\viewpoints\viewpoint6.txt (250, 2002-08-11)
Roamsteps20020818\viewpoints\viewpoint7.txt (250, 2002-08-11)
... ...

ROAM tutorial code, presented in several stages. by Mark Duchaineau (free but copyrighted, see LibGen/COPYING) 2002-08-07: wrote first vertion 2002-08-18: added details to Win32 build notes --- COMPILE --- To compile under unix-like systems: ./genroamsteps Under Win32/MSVC systems: 1) make sure you have GLUT from http://www.xmission.com/~nate/glut.html 2a) batch build using: buildvc.bat -- OR -- 2b) click on roamsteps.dsw and build using the MSVC IDE To clean up (remove files produced by compile): Unix-like systems: ./cleanroamsteps Win32 batch: cleanvc.bat --- RUNNING THE DEMOS --- The executables are roamfly1, roamfly2, etc (with .exe on Win32). Left button drag to rotate view 'a'/'z' -- accelerate forward and reverse ' ' -- stop '<'/'>' -- decrease/increase max level of detail 'i'/'I' -- increase/decrease quality limit ("tolerance") '0'-'9' -- enter a number to modify the next command (set to zero on next key) 'v' -- load camera parameters from file viewpointN.txt where N is the number you just entered ctrl-V -- save camera parameters to viewpointN.txt 'V' -- play the flight loop defined by viewpoint{0-9}.txt if N>0, set loop time to N seconds: 20=hyperfast, 40=fast, 60=normal, 120=slow displays ave frames/sec once per loop 'l'/'L' -- display/hide flight loop 's'/'S' -- show/skip stats output 'f'/'F' -- freeze/unfreeze the mesh esc -- quit NOTES ON BENCHMARKING: static viewpoint: use ctrl-V then v to save and load same view for different versions of the code. Then type 's' to show frames/sec. flight loop: use 'V'--the ave frames/sec is show once per loop. Loop times can be controlled--see notes on RUNNING THE DEMOS above. --- SOURCE CODE --- randtab.* -- general-purpose randomizer hash utility library fly.* -- portability wrapper for simple flight applications roam.h -- roam library API from application point of view, common to all implementations of the library roamtypes.h -- common definitions, types, structures for most roam library implementations roamfly.c -- demo application of the roam library implementations... this is the one source file with main() in it roamfly1 etc -- roamfly.c compiled with each of the library implementations roamstepN.c -- various library implementations of gradually increasing complexity and performance roamstep1.c -- simplest possible bintree recursion, fractal terrain no frustum cull, no caching, no crack fixes... roamstep2.c -- adds frustum cull to simple recursion roamstep3.c -- introduces backbone data structure, the diamond (roamdm). Adds caching. For simple fractal generation, does not make a huge difference (static view is faster, flight loop is a bit slower). However, the caching would give significant speed gains for more complex heightmap generation (high quality fractals for example). More important, allows future optimizations such as split/merge with dual priority queues. roamstep4.c -- introduces the two bucket-based queues for split/merge, and the optimization procedure that drives its use on a time budget each frame. roamstep5.c -- (TO DO) will add tiling subsystem, AGP/displaylist chunking For Unix-only use, ignore all the .plg, .dsp, .dsw, .ncb, .opt, .bat files and the Debug directory: these are only used for Win32 builds. For Win32-only use, ignore the genroamsteps* and cleanroamsteps shell scripts, as these only apply to Unix-style builds. Note that for Win32 binary-only distributions, the file glut32.dll must be included.

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