Fix north/south textures

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

raycaster.c

@@ -593,6 +593,8 @@ void drawRays3D()
   // * Cast n rays
   for (r = 0; r < 60; r++)
   {
+    int verticalMapTexture = 0;
+    int horizontalMapTexture = 0;
     // * --- Check Horizontal Lines ---
     dof = 0;
 
@@ -676,6 +678,8 @@ void drawRays3D()
         hy = rayY;
         distanceHor = distance(playerX, playerY, hx, hy, rayAngle);
 
+        verticalMapTexture = map[mapPoint] - 1;
+
         dof = 8; // Break the loop - no need to calculate more.
       }
       else
@@ -744,6 +748,8 @@ void drawRays3D()
         vy = rayY;
         distanceVert = distance(playerX, playerY, vx, vy, rayAngle);
 
+        verticalMapTexture = map[mapPoint] - 1;
+
         dof = 8; // Break the loop - no need to calculate more.
       }
       else
@@ -762,6 +768,7 @@ void drawRays3D()
     // Vertical wall hit
     if (distanceVert < distanceHor)
     {
+      horizontalMapTexture = verticalMapTexture;
       rayX = vx;
       rayY = vy;
       disT = distanceVert;
@@ -777,6 +784,7 @@ void drawRays3D()
     // Horizontal wall hit
     if (distanceHor < distanceVert)
     {
+      horizontalMapTexture = mh - 1;
       rayX = hx;
       rayY = hy;
       disT = distanceHor;
@@ -853,25 +861,25 @@ void drawRays3D()
     if (shade == 1) // North-south walls (PI -> (2 * PI))
     {
 
-      textureX = (int)(rayX / 2.0) % mapSize;
+      textureX = (int)(rayX / 2.0) % 32;
 
       if (rayAngle < PI) // South walls
       {
-        textureX = mapSize - 1 - textureX;
+        textureX = 31 - textureX;
       }
     }
     else // East-west walls (PI2 -> PI3)
     {
-      textureX = (int)(rayY / 2.0) % mapSize;
-      if (rayAngle > PI2 && rayAngle < PI3) // West
+      textureX = (int)(rayY / 2.0) % 32;
+      if (rayAngle > PI2 || rayAngle < PI3) // West
       {
-        textureX = mapSize - 1 - textureX;
+        textureX = 31 - textureX;
       }
     }
 
     for (x = xStart; x < xEnd; x++)
     {
-      float textureY = textureYoffset * textureYstep;
+      float textureY = textureYoffset * textureYstep + (horizontalMapTexture * 32);
       for (y = 0; y < lineHeight; y++)
       {
         float c = All_Textures[((int)textureY * mapSize) + textureX] * shade;