added variable to improve code readability

diff --git a/src/game_bd/bd_graphics.c b/src/game_bd/bd_graphics.c
index 34b34b39631d1ed37a0f0b8f7f2cef06d197a891..96421d4a090af325e798316e98564aca33f75c1b 100644 (file)
--- a/src/game_bd/bd_graphics.c
+++ b/src/game_bd/bd_graphics.c
@@ -294,6 +294,7 @@ static boolean use_native_bd_graphics_engine(void)
 
 int gd_drawcave(Bitmap *dest, GdGame *game, boolean force_redraw)
 {
+  GdCave *cave = game->cave;
   void (*blit_bitmap)(Bitmap *, Bitmap *, int, int, int, int, int, int) = BlitBitmap;
   static int show_flash_count = 0;
   boolean show_flash = FALSE;
@@ -305,7 +306,7 @@ int gd_drawcave(Bitmap *dest, GdGame *game, boolean force_redraw)
   if (game->itermax != game->itermax_last)
     redraw_all = TRUE;
 
-  if (!game->cave->gate_open_flash)
+  if (!cave->gate_open_flash)
   {
     show_flash_count = 0;
   }
@@ -327,9 +328,9 @@ int gd_drawcave(Bitmap *dest, GdGame *game, boolean force_redraw)
 
   /* here we draw all cells to be redrawn. we do not take scrolling area into
      consideration - sdl will do the clipping. */
-  for (y = game->cave->y1, yd = 0; y <= game->cave->y2; y++, yd++)
+  for (y = cave->y1, yd = 0; y <= cave->y2; y++, yd++)
   {
-    for (x = game->cave->x1, xd = 0; x <= game->cave->x2; x++, xd++)
+    for (x = cave->x1, xd = 0; x <= cave->x2; x++, xd++)
     {
       /* potential movement direction of game element */
       int dir = game->dir_buffer[y][x];
@@ -374,13 +375,13 @@ int gd_drawcave(Bitmap *dest, GdGame *game, boolean force_redraw)
          /* get cave field position the game element is moving from */
          int dx = (dir == GD_MV_LEFT ? +1 : dir == GD_MV_RIGHT ? -1 : 0);
          int dy = (dir == GD_MV_UP   ? +1 : dir == GD_MV_DOWN  ? -1 : 0);
-         int old_x = game->cave->getx(game->cave, x + dx, y + dy);
-         int old_y = game->cave->gety(game->cave, x + dx, y + dy);
+         int old_x = cave->getx(cave, x + dx, y + dy);
+         int old_y = cave->gety(cave, x + dx, y + dy);
 
-         if (old_x >= game->cave->x1 &&
-             old_x <= game->cave->x2 &&
-             old_y >= game->cave->y1 &&
-             old_y <= game->cave->y2)
+         if (old_x >= cave->x1 &&
+             old_x <= cave->x2 &&
+             old_y >= cave->y1 &&
+             old_y <= cave->y2)
          {
            if (game->dir_buffer[old_y][old_x] == GD_MV_STILL)
            {