X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Fgame_em%2Fgraphics.c;h=7f303a2a6510b78fda2ae33728a6037669e5cf6d;hb=38212569c2f58866417f26e9c813ed8b23c5b2c4;hp=b36f78cb1981913ba5846552571edfa24f182034;hpb=11f6cf58952f5e9f40ce021a973a0f00ecbf1e9c;p=rocksndiamonds.git

diff --git a/src/game_em/graphics.c b/src/game_em/graphics.c
index b36f78cb..7f303a2a 100644
--- a/src/game_em/graphics.c
+++ b/src/game_em/graphics.c
@@ -25,9 +25,9 @@
 #define VALID_SCREEN_Y(y)	((y) < MIN_SCREEN_Y ? MIN_SCREEN_Y :	\
 				 (y) > MAX_SCREEN_Y ? MAX_SCREEN_Y : (y))
 
-#define PLAYER_POS_X(nr)	(((7 - frame) * ply[nr].oldx +		\
+#define PLAYER_POS_X(nr)	(((7 - frame) * ply[nr].prev_x +	\
 				  (1 + frame) * ply[nr].x) * TILEX / 8)
-#define PLAYER_POS_Y(nr)	(((7 - frame) * ply[nr].oldy +		\
+#define PLAYER_POS_Y(nr)	(((7 - frame) * ply[nr].prev_y +	\
 				  (1 + frame) * ply[nr].y) * TILEY / 8)
 
 #define PLAYER_SCREEN_X(nr)	(PLAYER_POS_X(nr) -			\
@@ -49,6 +49,8 @@ static int crumbled_state[MAX_PLAYFIELD_WIDTH + 2][MAX_PLAYFIELD_HEIGHT + 2];
 struct GraphicInfo_EM graphic_info_em_object[GAME_TILE_MAX][8];
 struct GraphicInfo_EM graphic_info_em_player[MAX_PLAYERS][PLY_MAX][8];
 
+static void setScreenCenteredToAllPlayers(int *, int *);
+
 int getFieldbufferOffsetX_EM(void)
 {
   return screen_x % TILEX;
@@ -368,7 +370,7 @@ static void animscreen(void)
  * handles transparency and movement
  */
 
-static void blitplayer(int nr)
+static void blitplayer_ext(int nr)
 {
   int x1, y1, x2, y2;
 
@@ -385,10 +387,10 @@ static void blitplayer(int nr)
       (int)(y2 - screen_y) < ((MAX_BUF_YSIZE - 1) * TILEY - 1))
   {
     /* some casts to "int" are needed because of negative calculation values */
-    int dx = (int)ply[nr].x - (int)ply[nr].oldx;
-    int dy = (int)ply[nr].y - (int)ply[nr].oldy;
-    int old_x = (int)ply[nr].oldx + (int)frame * dx / 8;
-    int old_y = (int)ply[nr].oldy + (int)frame * dy / 8;
+    int dx = (int)ply[nr].x - (int)ply[nr].prev_x;
+    int dy = (int)ply[nr].y - (int)ply[nr].prev_y;
+    int old_x = (int)ply[nr].prev_x + (int)frame * dx / 8;
+    int old_y = (int)ply[nr].prev_y + (int)frame * dy / 8;
     int new_x = old_x + SIGN(dx);
     int new_y = old_y + SIGN(dy);
     int old_sx = old_x % MAX_BUF_XSIZE;
@@ -430,17 +432,54 @@ static void blitplayer(int nr)
   }
 }
 
+static void blitplayer(int nr)
+{
+  blitplayer_ext(nr);
+
+  /* check for wrap-around movement ... */
+  if (ply[nr].x < lev.left ||
+      ply[nr].x > lev.right - 1)
+  {
+    struct PLAYER ply_last = ply[nr];
+    int dx = ply[nr].x - ply[nr].prev_x;
+
+    ply[nr].x = (ply[nr].x < lev.left ? lev.right - 1 : lev.left);
+    ply[nr].prev_x = ply[nr].x - dx;
+
+    if (!lev.infinite_true)
+    {
+      int dy = ply[nr].y - ply[nr].prev_y;
+
+      ply[nr].y += (ply[nr].x == lev.left ? 1 : -1);
+      ply[nr].prev_y = ply[nr].y - dy;
+    }
+
+    /* draw player entering playfield from the opposite side */
+    blitplayer_ext(nr);
+
+    /* ... but keep the old player position until game logic */
+    ply[nr] = ply_last;
+  }
+}
+
 void game_initscreen(void)
 {
-  int player_nr;
-  int x,y;
+  int x, y, sx, sy;
 
   frame = 1;
 
-  player_nr = (game.centered_player_nr != -1 ? game.centered_player_nr : 0);
+  if (game.centered_player_nr == -1)
+  {
+    setScreenCenteredToAllPlayers(&sx, &sy);
+  }
+  else
+  {
+    sx = PLAYER_SCREEN_X(game.centered_player_nr);
+    sy = PLAYER_SCREEN_Y(game.centered_player_nr);
+  }
 
-  screen_x = VALID_SCREEN_X(PLAYER_SCREEN_X(player_nr));
-  screen_y = VALID_SCREEN_Y(PLAYER_SCREEN_Y(player_nr));
+  screen_x = VALID_SCREEN_X(sx);
+  screen_y = VALID_SCREEN_Y(sy);
 
   for (y = 0; y < MAX_BUF_YSIZE; y++)
   {
@@ -634,7 +673,16 @@ void RedrawPlayfield_EM(boolean force_redraw)
     int screen_yy = VALID_SCREEN_Y(sy);
 
     if (draw_new_player_location_wrap)
+    {
+      if (lev.infinite_true)
+      {
+	// when wrapping around (horizontally), keep vertical player position
+	screen_yy = screen_y;
+      }
+
+      // scrolling for wrapping should be faster than for switching players
       wait_delay_value /= 4;
+    }
 
     SetVideoFrameDelay(wait_delay_value);