RayTracer

Basic RayTracer

What it is ?

Full Software (CPU/FPU, no ASM acceleration, no SSE specific development) RayTracer using multi-threading, diffuse (lambert), specular (blinn/phong), reflection, refraction, 2d map texturing (point and bi-lerp filtering), bump-mapping, horizontal supersampling (only on edge boundary) and hard shadows.

The SSE2 binary is only a VisualStudio compiler option (gain is variable, very minus on Pentium4 = 1%, higher on Core2 = 20%).

It's wrote in C/C++ with VisualStudio 2005/2008, but I keep portability on my mind using SDL.
Only Multi-Thread code is windows compliant, but can be removed without probleme.

How it look ?

Download

Click here to get sources and binaries

What's new in 0.1.3

fix octree structure accelerator for mesh
add octree structure accelerator for node
add diffuse reflection... too slow : move between commentaries
use better point light distance attenuation (pow2 distance)
add 64bits executable (SSE2 option seem to be disable in VisualC then compile in x64 mode). But performance under intel Core2 is better in 64bit without SSE2 than x86 with SSE2 ! But, warn please, the automatic core detection don't work in 64bit (not yet ported ASM stuff)
update SDL_ttf for using FreeType-2.3.7 as static lib
add VisualC++ 2008 SP1 projects (and reorganise VisualC++ 2005 SP1 ones), VisualC 2008 SP1 produce speeder SSE2 optimisation (near 3%)
add transform in XML scene

In the future ?

fix this stupid bug in dot3 bump mapping
fix this stupid bug in triangle shadow intersection
fix this stupid bug in refraction
mip-mapping and other classic texture filterings
diffuse refraction/reflection
lighting emitter materiel for object
better multi-threading
debug structures accelerators for meshes...

Real-time... Are you sure

Get realtime with default setting and build-in benchmark :
(fps = frame per second, mrps = millions of ray per second)

intel Core 2 Duo E6850 3.0Ghz (winXP SP3 32bits, 3.4Go)

- 320x240, 2 threads, SSE2 :	13.4 fps,	1.556 mrps
- 320x240, 2 threads :	9.9 fps,	1.145 mrps
- 320x240, 1 thread :	5.1 fps,	0.585 mrps
- 640x480, 2 threads, SSE2 :	3.6 fps,	1.622 mrps
- 640x480, 2 threads :	2.6 fps,	1.173 mrps
- 640x480, 1 thread :	1.3 fps,	0.594 mrps

intel Core 2 Duo E6650 2.33Ghz (win2008 sp1 32bits, 2.0Go)

- 320x240, 2 threads, SSE2 :	10.4 fps,	1.206 mrps
- 320x240, 2 threads :	7.6 fps,	0.878 mrps
- 320x240, 1 thread :	4.0 fps,	0.462 mrps
- 640x480, 2 threads, SSE2 :	2.9 fps,	1.287 mrps
- 640x480, 2 threads :	2.0 fps,	0.914 mrps
- 640x480, 1 thread :	1.1 fps,	0.472 mrps

Old version (in french description)

Voici mon petit programme de raytracing comme vous en trouverez plein sur Internet.

Le but de la chose etait d'experimenter le RayTracing temps-réel de façon 100% logiciel (pas d'acceleration particuliere).
Je fourni les sources (et les bugs qui vont avec

) pour Microsoft VisualC 2005.

Au niveau binaire, on trouvera un executable SS2 qui n'est qu'une simple option du compilateur (VC2005).

J'utilise la librairie SDL pour l'affichage (et son extension TTF pour les fonts utilisées).

Il y a un petit bench fourni avec.

Resultat du bench pour la version 0.1.1

* intel core 2 duo E6850 3.0Ghz (winXP SP3, 3.4Go)
- 320x240, 2 threads, SSE2 :    17.9 fps, 1.88 Millions of rays per second ;
- 320x240, 2 threads :    14.6 fps, 1.53 Millions of rays per second ;
- 320x240, 1 thread :       7.8 fps, 0.82 Millions of rays per second ;
- 640x480, 2 threads, SSE2 :     4.7 fps, 1.91 Millions of rays per second ;
- 640x480, 2 threads :       3.9 fps, 1.57 Millions of rays per second ;
- 640x480, 1 thread :       2.1 fps, 0.84 Millions of rays per second.
* intel core 2 duo E6650 2.33Ghz (win2008, 2.0Go)
- 320x240, 2 threads, SSE2 :    15.0 fps, 1.58 Millions of rays per second ;
- 320x240, 2 threads :    11.8 fps, 1.24 Millions of rays per second ;
- 320x240, 1 thread :       6.2 fps, 0.65 Millions of rays per second ;
- 640x480, 2 threads, SSE2 :     4.1 fps, 1.64 Millions of rays per second ;
- 640x480, 2 threads :       3.2 fps, 1.28 Millions of rays per second ;
- 640x480, 1 thread :       1.6 fps, 0.66 Millions of rays per second.
* intel core 2 duo T7200 2.2Ghz (Vista SP1, 2Go)
- 320x240, 2 threads, SSE2 :    11.7 fps, 1.23 Millions of rays per second ;
- 320x240, 2 threads :       9.3 fps, 0.98 Millions of rays per second ;
- 320x240, 1 thread :       5.2 fps, 0.55 Millions of rays per second ;
- 640x480, 2 threads, SSE2 :     3.1 fps, 1.26 Millions of rays per second ;
    - 640x480, 2 threads :       2.5 fps, 1.02 Millions of rays per second ;
- 640x480, 1 thread :       1.4 fps, 0.56 Millions of rays per second.
* amd athlon64 X2 4600+ 2.4Ghz (WinXP SP3, 3.4Go)
- 320x240, 2 threads, SSE2 :     8.2 fps, 0.86 Millions of rays per second ;
- 320x240, 2 threads :       8.5 fps, 0.90 Millions of rays per second ;
- 320x240, 1 thread :       5.4 fps, 0.57 Millions of rays per second ;
- 640x480, 2 threads, SSE2 :     2.2 fps, 0.88 Millions of rays per second ;
- 640x480, 2 threads :       2.3 fps, 0.92 Millions of rays per second ;
- 640x480, 1 thread :       1.4 fps, 0.58 Millions of rays per second.
* intel core 2 duo T2300E 1.66Ghz (WinXP SP2, 1Go)
- 320x240, 2 threads, SSE2 :     8.7 fps, 0.925 Millions of rays per second ;
- 320x240, 2 threads :       6.9 fps, 0.725 Millions of rays per second ;
- 320x240, 1 thread :       3.8 fps, 0.407 Millions of rays per second ;
- 640x480, 2 threads, SSE2 :     2.3 fps, 0.926 Millions of rays per second ;
- 640x480, 2 threads :       1.8 fps, 0.73 Millions of rays per second ;
- 640x480, 1 thread :       1.0 fps, 0.411 Millions of rays per second.
* amd Athlon XP 2600+ 2.0Ghz (WinXP SP3, 2Go)
- 320x240, 1 thread :       4.5 fps, 0.47 Millions of rays per second ;
- 640x480, 1 thread :       1.2 fps, 0.48 Millions of rays per second.
* intel Pentium4 D630 3.0Ghz (WinXP SP3, 2Go)
- 320x240, 2 threads, SSE2 :     5.6 fps, 0.59 Millions of rays per second ;
- 320x240, 2 threads :       5.9 fps, 0.62 Millions of rays per second ;
- 320x240, 1 thread :       4.3 fps, 0.45 Millions of rays per second ;
- 640x480, 2 threads, SSE2 :     1.5 fps, 0.61 Millions of rays per second ;
- 640x480, 2 threads :       1.7 fps, 0.67 Millions of rays per second ;
- 640x480, 1 thread :       1.1 fps, 0.46 Millions of rays per second.
* amd Athlon XP 2500+ 1.83Ghz (WinXP SP2, 512Mo)
   - 320x240, 1 thread :       4.0 fps, 0.42 Millions of rays per second ;
- 640x480, 1 thread :       1.0 fps, 0.42 Millions of rays per second.

Telechargement

RayTracer Version 0.1.2

RayTracer Version 0.1.1