From d980f28fb7c360164a95ac41817e23f8fe1380f6 Mon Sep 17 00:00:00 2001
From: attilavs2 <whahou.1@gmail.com>
Date: Sun, 20 Aug 2023 15:45:57 +0200
Subject: [PATCH] Tests sampling

---
 CMakeLists.txt |  2 +-
 src/main.c     |  2 +-
 src/moteur.c   | 14 +++++++++++---
 3 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 769b34e..a666cb1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,7 +23,7 @@ set(ASSETS
 fxconv_declare_assets(${ASSETS} ${ASSETS_fx} ${ASSETS_cg} WITH_METADATA)
 
 add_executable(myaddin ${SOURCES} ${ASSETS} ${ASSETS_${FXSDK_PLATFORM}})
-target_compile_options(myaddin PRIVATE -Wall -Wextra -Os)
+target_compile_options(myaddin PRIVATE -Wall -Wextra -Ofast)
 target_link_libraries(myaddin Gint::Gint )
 target_link_libraries(myaddin LibProf::LibProf)
 target_link_options(myaddin PRIVATE -Wl,--print-memory-usage)
diff --git a/src/main.c b/src/main.c
index f33e29c..66f2e02 100644
--- a/src/main.c
+++ b/src/main.c
@@ -43,7 +43,7 @@ void USB_capture() {
 }
 #endif
 
-//#define debug //pour afficher les infos de debug
+#define debug //pour afficher les infos de debug
 
 extern char map_test[map_w][map_h];
 
diff --git a/src/moteur.c b/src/moteur.c
index 6e7e689..0d99fc7 100644
--- a/src/moteur.c
+++ b/src/moteur.c
@@ -261,7 +261,11 @@ void draw_walls(image_t *tex_1, image_t *tex_2, image_t *tex_3, image_t *tex_4,
       deltaDistY = abs(fdiv(0xFFFF, rayDirY));
       
       //calculate step and initial sideDist
-      if (rayDirX <= 0) {
+      if (rayDirX == 0) {
+	      stepX = 0;
+	      sideDistX = 0;
+      }
+      else if (rayDirX < 0) {
         stepX = -1; //true
         sideDistX = fmul(posX - fix(mapX), deltaDistX);
       }
@@ -270,7 +274,11 @@ void draw_walls(image_t *tex_1, image_t *tex_2, image_t *tex_3, image_t *tex_4,
         sideDistX = fmul( fix(mapX + 1) - posX, deltaDistX);
       }
 
-      if (rayDirY <= 0) {
+      if (rayDirY == 0) {
+        stepY = 0;
+	      sideDistY = 0;
+      }
+      else if (rayDirY < 0) {
         stepY = -1; //true
         sideDistY = fmul(posY - fix(mapY), deltaDistY);
       }
@@ -338,7 +346,7 @@ void draw_walls(image_t *tex_1, image_t *tex_2, image_t *tex_3, image_t *tex_4,
       if (texSize < 0x400) texSize = 0x400; //0x400 = 1/64 * 2^16
       if (texSize > 0x3D000) { //0x3D000 = 3.8125 * 2^16, 3.8125 = viewport_h/64
         texSample = ffloor(fdiv(fix(viewport_h), texSize));
-        texSampleY  = 32 - (int)texSample * 0.5;
+        texSampleY  = 32 - (int)texSample * 0.5 + 1;
       }
       else {
         texSample = 64;