added basic support for additional empty space elements in game engine

[rocksndiamonds.git] / src / tools.c

diff --git a/src/tools.c b/src/tools.c
index 2ddbb303472553544cf435e3b2113768cb3cd007..a3e5306835f7082e83a21f22c3dc053f13f5257d 100644 (file)
--- a/src/tools.c
+++ b/src/tools.c
@@ -1483,6 +1483,29 @@ int getGraphicAnimationFrame(int graphic, int sync_frame)
 
 int getGraphicAnimationFrameXY(int graphic, int lx, int ly)
 {
+  if (graphic_info[graphic].anim_mode & ANIM_TILED)
+  {
+    struct GraphicInfo *g = &graphic_info[graphic];
+    int xsize = MAX(1, g->anim_frames_per_line);
+    int ysize = MAX(1, g->anim_frames / xsize);
+    int xoffset = g->anim_start_frame % xsize;
+    int yoffset = g->anim_start_frame % ysize;
+    int x = (lx + xoffset + xsize) % xsize;
+    int y = (ly + yoffset + ysize) % ysize;
+    int sync_frame = y * xsize + x;
+
+    return sync_frame % g->anim_frames;
+  }
+  else if (graphic_info[graphic].anim_mode & ANIM_RANDOM_STATIC)
+  {
+    struct GraphicInfo *g = &graphic_info[graphic];
+    int x = (lx + lev_fieldx) % lev_fieldx;
+    int y = (ly + lev_fieldy) % lev_fieldy;
+    int sync_frame = GfxRandomStatic[x][y];
+
+    return sync_frame % g->anim_frames;
+  }
+
   return getGraphicAnimationFrame(graphic, GfxFrame[lx][ly]);
 }
 
@@ -1973,6 +1996,9 @@ void DrawScreenElementExt(int x, int y, int dx, int dy, int element,
   int graphic;
   int frame;
 
+  if (element == EL_EMPTY)
+    element = GfxElementEmpty[lx][ly];
+
   if (IN_LEV_FIELD(lx, ly))
   {
     SetRandomAnimationValue(lx, ly);
@@ -1993,7 +2019,7 @@ void DrawScreenElementExt(int x, int y, int dx, int dy, int element,
   else // border element
   {
     graphic = el2img(element);
-    frame = getGraphicAnimationFrame(graphic, -1);
+    frame = getGraphicAnimationFrameXY(graphic, lx, ly);
   }
 
   if (element == EL_EXPANDABLE_WALL)
@@ -3937,6 +3963,9 @@ void DrawLevelGraphicAnimationIfNeeded(int x, int y, int graphic)
   if (!IS_NEW_FRAME(GfxFrame[x][y], graphic))
     return;
 
+  if (ANIM_MODE(graphic) & (ANIM_TILED | ANIM_RANDOM_STATIC))
+    return;
+
   DrawGraphicAnimation(sx, sy, graphic);
 
 #if 1