diff --git a/CMakeLists.txt b/CMakeLists.txt
index b72cc02..20a9446 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,7 +28,7 @@ set(ASSETS
 fxconv_declare_assets(${ASSETS} WITH_METADATA)
 
 add_executable(Copy3DEngine ${SOURCES} ${ASSETS})
-target_compile_options(Copy3DEngine PRIVATE -Wall -Wextra -O2 -g)
+target_compile_options(Copy3DEngine PRIVATE -Wall -Wextra -Ofast)
 target_compile_definitions(Copy3DEngine PRIVATE NAMEOFGAME="${NAMEOFGAME}" AUTHOR="${AUTHOR}")
 target_link_libraries(Copy3DEngine Gint::Gint)
 target_link_libraries(Copy3DEngine LibProf::LibProf)
diff --git a/src/fixed.h b/src/fixed.h
index 7818697..9cab461 100644
--- a/src/fixed.h
+++ b/src/fixed.h
@@ -9,6 +9,10 @@
 typedef int32_t fixed_t;
 /* Standard arithmetic. */
 
+typedef struct {
+    int32_t x ,y;
+} V2d;
+
 static inline fixed_t fmul(fixed_t left, fixed_t right)
 {
     /* Generally optimized by the compiler to use dmuls.l and xtrct */
@@ -85,3 +89,7 @@ static inline fixed_t fease(fixed_t x)
         return fix(1) - 2 * fmul(x, x);
     }
 }
+
+static inline fixed_t fV2d_dotp(V2d u, V2d v){
+    return fmul(u.x,v.x) + fmul(u.y,v.y);
+}
diff --git a/src/main.c b/src/main.c
index fcb0ca9..3e55dad 100644
--- a/src/main.c
+++ b/src/main.c
@@ -119,7 +119,7 @@ int main(){
     dma_memset((void*)((uint32_t)gint_vram + viewport_w*viewport_h),
                0xc4c9c4c9, viewport_w*viewport_h);
 
-    draw_walls(frame_buffer);
+    draw_walls();
 
     if(first_frame == 1){
       main_menu();
diff --git a/src/moteur.c b/src/moteur.c
index ea61cea..55b107f 100644
--- a/src/moteur.c
+++ b/src/moteur.c
@@ -11,6 +11,7 @@
 
 #include "fixed.h"
 
+#include "gint/display-cg.h"
 #include "moteur.h"
 #include "map.h"
 
@@ -166,7 +167,7 @@ void load_map(){
   spawn_gen();
 }
 
-void draw_walls(image_t *frame_buffer){
+void draw_walls(){
     extern fixed_t posX;
     extern fixed_t posY;
     extern fixed_t dirX;
@@ -307,7 +308,7 @@ void draw_walls(image_t *frame_buffer){
       if (lineHeight > viewport_h) lineHeight = viewport_h - 1;
 
       fixed_t texSize = fix(lineHeight) / 64; //taille proportionelle de la ligne a la tex
-      /*if (texSize < 0x400) texSize = 0x400; //0x400 = 1/64 * 2^16
+      if (texSize < 0x400) texSize = 0x400; //0x400 = 1/64 * 2^16
       if (texSize > 0x3D000) { //0x3D000 = 3.8125 * 2^16, 3.8125 = viewport_h/64
         texSample = fceil(fdiv(fix(viewport_h), texSize));
         texSampleY  = 32 - (int)texSample * 0.5;
@@ -317,7 +318,7 @@ void draw_walls(image_t *frame_buffer){
         texSampleY = 0; 
       }
 
-      image_t texStripe;
+      /*image_t texStripe;
 
       texStripe = *image_sub(tex_index[map_test[mapX][mapY]], texX, texSampleY, 1, texSample);
 
@@ -327,16 +328,17 @@ void draw_walls(image_t *frame_buffer){
       image_t *tex = tex_index[map_test[mapX][mapY]];
 
       int linePos = viewport_h/2 - lineHeight/2;
-      uint16_t *imgpos = (void*)((uint32_t)tex->data + 2*texX);
 
-      texSize = ffloor(texSize);
 
-      for(i = linePos; i < linePos + lineHeight;){
-        for(int j = 0; j <= texSize; j++){
-          gint_vram[i*396+x] = *imgpos;
-          i++;
+      int maxpos = (linePos + lineHeight) > viewport_h ? viewport_h:(linePos + lineHeight);
+      fixed_t screenPos = fix(linePos);
+      uint32_t texDat = (uint32_t)tex->data + 2*texX;
+      for(int texPos = texSampleY; texPos < texSample; texPos++){
+        for(fixed_t oldPos = screenPos; oldPos < screenPos+texSize; oldPos+=0xFFFF){
+          gint_vram[ffloor(oldPos)*396+x] =*(uint16_t*)texDat;
         }
-        imgpos = (void*)((uint32_t)imgpos + tex->stride);
+        screenPos += texSize;
+        texDat += tex->stride;
       }
     }
 }
diff --git a/src/moteur.h b/src/moteur.h
index fb32a09..eaee3fc 100644
--- a/src/moteur.h
+++ b/src/moteur.h
@@ -10,13 +10,13 @@
 #define screen_h 224
 #define viewport_w 396
 #define viewport_h 224
-#define max_dist 0x1FFFFF //en tuiles << 16, actuellement 32
+#define max_dist fix(32) //en tuiles << 16, actuellement 32
 
 #define TINDEX_S 256
 
 void load_map();
 void end_screen();
-void draw_walls(image_t *frame_buffer);
+void draw_walls();
 void move();
 
 #endif /* moteur */