Continue elevators

levels.h

@@ -99,7 +99,7 @@ static const SFG_Level SFG_level0 =
     .tileDictionary =
     {
       SFG_TD(0 ,31,0,0),SFG_TD(15,63,5,0),SFG_TD(28,63,1,0),SFG_TD(6 ,63,6,0), // 0
-      SFG_TD(10,28,4,0),SFG_TD(4 ,63,4,0),SFG_TD(5 ,63,4,0),SFG_TD(1 ,10,1,0), // 4
+      SFG_TD(0 ,28,2,0),SFG_TD(4 ,63,4,0),SFG_TD(5 ,63,4,0),SFG_TD(1 ,10,1,0), // 4
       SFG_TD(0 ,31,0,0),SFG_TD(0 ,63,0,0),SFG_TD(0 ,63,0,0),SFG_TD(0 ,63,0,0), // 8
       SFG_TD(0 ,31,0,0),SFG_TD(0 ,63,0,0),SFG_TD(0 ,63,0,0),SFG_TD(0 ,63,0,0), // 12
       SFG_TD(0 ,31,0,0),SFG_TD(0 ,63,0,0),SFG_TD(0 ,63,0,0),SFG_TD(0 ,63,0,0), // 16

main.c

@@ -88,12 +88,19 @@ void SFG_pixelFunc(RCL_PixelInfo *pixel)
       (pixel->hit.type & 0x7) :
       ((pixel->hit.type & 0x38) >> 3); 
 
+    RCL_Unit textureV = pixel->height - pixel->texCoords.y;
+
+    if (pixel->hit.type & SFG_TILE_PROPERTY_ELEVATOR) 
+      textureV -= pixel->wallHeight;
+
+    textureV %= RCL_UNITS_PER_SQUARE; // hopefully gets optimized to bitwise and
+
     color =
       textureIndex != SFG_TILE_TEXTURE_TRANSPARENT ?
       (SFG_getTexel(
-        SFG_currentLevel.textures[pixel->hit.type],
+        SFG_currentLevel.textures[textureIndex],
         pixel->texCoords.x / 32,
-        ((pixel->height - pixel->texCoords.y) % RCL_UNITS_PER_SQUARE) / 32)
+        textureV / 32)
       ) :
       SFG_TRANSPARENT_COLOR;
 
@@ -139,11 +146,12 @@ void SFG_pixelFunc(RCL_PixelInfo *pixel)
 
 RCL_Unit SFG_texturesAt(int16_t x, int16_t y)
 {
-  uint8_t properties;
+  uint8_t p;
 
-  SFG_TileDefinition tile = SFG_getMapTile(&(SFG_level0.map),x,y,&properties);
+  SFG_TileDefinition tile = SFG_getMapTile(&(SFG_level0.map),x,y,&p);
-  return SFG_TILE_FLOOR_TEXTURE(tile) | (SFG_TILE_CEILING_TEXTURE(tile) << 3);
+  return
-         // ^ store both textures (floor and ceiling) in one number
+    SFG_TILE_FLOOR_TEXTURE(tile) | (SFG_TILE_CEILING_TEXTURE(tile) << 3) | p;
+    // ^ store both textures (floor and ceiling) and properties in one number
 }
 
 RCL_Unit SFG_movingWallHeight

raycastlib.h

@@ -267,6 +267,7 @@ typedef struct
   int8_t        isHorizon; ///< If the pixel belongs to horizon segment.
   RCL_Unit      depth;     ///< Corrected depth.
   RCL_Unit      height;    ///< World height (mostly for floor).
+  RCL_Unit      wallHeight;///< Only for wall pixels, says its height.
   RCL_HitResult hit;       ///< Corresponding ray hit.
   RCL_Vector2D  texCoords; /**< Normalized (0 to RCL_UNITS_PER_SQUARE - 1)
                                 texture coordinates. */
@@ -1238,6 +1239,7 @@ void _RCL_columnFunctionComplex(RCL_HitResult *hits, uint16_t hitCount, uint16_t
   p.height = 0;
   p.texCoords.x = 0;
   p.texCoords.y = 0;
+  p.wallHeight = 0;
 
   // we'll be simulatenously drawing the floor and the ceiling now  
   for (RCL_Unit j = 0; j <= hitCount; ++j)
@@ -1294,6 +1296,7 @@ void _RCL_columnFunctionComplex(RCL_HitResult *hits, uint16_t hitCount, uint16_t
     // draw floor until wall
     p.isFloor = 1;
     p.height = fZ1World + _RCL_camera.height;
+    p.wallHeight = 0;
 
 #if RCL_COMPUTE_FLOOR_DEPTH == 1
     p.depth = (_RCL_fHorizontalDepthStart - fPosY) * _RCL_horizontalDepthStep;
@@ -1336,6 +1339,7 @@ void _RCL_columnFunctionComplex(RCL_HitResult *hits, uint16_t hitCount, uint16_t
       p.isFloor = 1;
       p.texCoords.x = hit.textureCoord;
       p.height = fZ1World + _RCL_camera.height;
+      p.wallHeight = fWallHeight;
 
       // draw floor wall
 
@@ -1366,6 +1370,7 @@ void _RCL_columnFunctionComplex(RCL_HitResult *hits, uint16_t hitCount, uint16_t
       {
         p.isFloor = 0;
         p.height = cZ1World + _RCL_camera.height;
+        p.wallHeight = cWallHeight;
 
         limit = _RCL_drawWall(cPosY,cZ1Screen,cZ2Screen,
                   -1,fPosY - 1,
@@ -1398,6 +1403,7 @@ void _RCL_columnFunctionSimple(RCL_HitResult *hits, uint16_t hitCount,
 
   RCL_PixelInfo p;
   p.position.x = x;
+  p.wallHeight = RCL_UNITS_PER_SQUARE;
 
   if (hitCount > 0)
   {