update readme
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README.md
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README.md
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@ -19,9 +19,11 @@ Affichage : **VGA Mode 13h** — 320×200, 256 couleurs, rendu Gouraud en virgul
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## Exemples
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Vue en flatshading
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Vue en Gouraud
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@ -37,33 +39,13 @@ src/
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engine.c Maths (sin/cos), matrices, pipeline de rendu
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geometry.c Génération de meshes (sphère, cylindre) + I/O mesh
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graph.c VGA init, palette, backbuffer/zbuffer
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image.c gestion des fichiers image
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raster.c Rastériseur triangle Gouraud, tracé de ligne Z-buffered
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build/
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app.exe Binaire DOS final (CauseWay)
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link.lnk Script de link généré automatiquement
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Makefile Build via WSL + wcc386 Windows natif
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```
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---
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## Pipeline de rendu
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```
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init_engine_math() Précalcul sin/cos (tables entières 16.16)
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add_sphere / add_cylinder Génération mesh en espace local (0,0,0)
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─── Boucle principale ───
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kbhit / getch Gestion clavier (touches étendues consommées en deux appels)
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mat3_rotate_x/y Construction matrices de rotation
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mat3_mul (orbite) Composition de la matrice d'orbite (sûre contre l'aliasing)
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→ obj.rot = orbit Application uniforme à tous les objets
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→ obj.pos = orbit × base_pos + center Rotation 3D complète des positions
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clear_buffers Effacement backbuffer + zbuffer (0xFFFF)
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render_universe Transformation + projection + Gouraud fill
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flip memcpy backbuffer → 0xA0000 (VGA)
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```
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---
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## Arithmétique virgule fixe 16.16
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| Macro/fonction | Opération |
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