+ SetRandomAnimationValue(x, y);
+
+#if 1
+ PlayLevelSoundActionIfLoop(x, y, GfxAction[x][y]);
+#endif
+
+ if (IS_INACTIVE(element))
+ {
+ if (IS_ANIMATED(graphic))
+ DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+
+ continue;
+ }
+
+#if 1
+ /* this may take place after moving, so 'element' may have changed */
+#if 0
+ if (IS_CHANGING(x, y))
+#else
+ if (IS_CHANGING(x, y) &&
+ (game.engine_version < VERSION_IDENT(3,0,7,1) || !Stop[x][y]))
+#endif
+ {
+#if 0
+ ChangeElement(x, y, ChangePage[x][y] != -1 ? ChangePage[x][y] :
+ element_info[element].event_page_nr[CE_DELAY]);
+#else
+ ChangeElement(x, y, element_info[element].event_page_nr[CE_DELAY]);
+#endif
+
+ element = Feld[x][y];
+ graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
+ }
+#endif
+
+ if (!IS_MOVING(x, y) && (CAN_FALL(element) || CAN_MOVE(element)))
+ {
+ StartMoving(x, y);
+
+#if 1
+ element = Feld[x][y];
+ graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
+#if 0
+ if (element == EL_MOLE)
+ printf("::: %d, %d, %d [%d]\n",
+ IS_ANIMATED(graphic), IS_MOVING(x, y), Stop[x][y],
+ GfxAction[x][y]);
+#endif
+#if 0
+ if (element == EL_YAMYAM)
+ printf("::: %d, %d, %d\n",
+ IS_ANIMATED(graphic), IS_MOVING(x, y), Stop[x][y]);
+#endif
+#endif
+
+ if (IS_ANIMATED(graphic) &&
+ !IS_MOVING(x, y) &&
+ !Stop[x][y])
+ {
+ DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+
+#if 0
+ if (element == EL_BUG)
+ printf("::: %d, %d\n", graphic, GfxFrame[x][y]);
+#endif
+
+#if 0
+ if (element == EL_MOLE)
+ printf("::: %d, %d\n", graphic, GfxFrame[x][y]);
+#endif
+ }
+
+ if (IS_GEM(element) || element == EL_SP_INFOTRON)
+ EdelsteinFunkeln(x, y);
+ }
+ else if ((element == EL_ACID ||
+ element == EL_EXIT_OPEN ||
+ element == EL_SP_EXIT_OPEN ||
+ element == EL_SP_TERMINAL ||
+ element == EL_SP_TERMINAL_ACTIVE ||
+ element == EL_EXTRA_TIME ||
+ element == EL_SHIELD_NORMAL ||
+ element == EL_SHIELD_DEADLY) &&
+ IS_ANIMATED(graphic))
+ DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+ else if (IS_MOVING(x, y))
+ ContinueMoving(x, y);
+ else if (IS_ACTIVE_BOMB(element))
+ CheckDynamite(x, y);
+#if 0
+ else if (element == EL_EXPLOSION && !game.explosions_delayed)
+ Explode(x, y, ExplodePhase[x][y], EX_NORMAL);
+#endif
+ else if (element == EL_AMOEBA_GROWING)
+ AmoebeWaechst(x, y);
+ else if (element == EL_AMOEBA_SHRINKING)
+ AmoebaDisappearing(x, y);
+
+#if !USE_NEW_AMOEBA_CODE
+ else if (IS_AMOEBALIVE(element))
+ AmoebeAbleger(x, y);
+#endif
+
+ else if (element == EL_GAME_OF_LIFE || element == EL_BIOMAZE)
+ Life(x, y);
+ else if (element == EL_EXIT_CLOSED)
+ CheckExit(x, y);
+ else if (element == EL_SP_EXIT_CLOSED)
+ CheckExitSP(x, y);
+ else if (element == EL_EXPANDABLE_WALL_GROWING)
+ MauerWaechst(x, y);
+ else if (element == EL_EXPANDABLE_WALL ||
+ element == EL_EXPANDABLE_WALL_HORIZONTAL ||
+ element == EL_EXPANDABLE_WALL_VERTICAL ||
+ element == EL_EXPANDABLE_WALL_ANY)
+ MauerAbleger(x, y);
+ else if (element == EL_FLAMES)
+ CheckForDragon(x, y);
+#if 0
+ else if (IS_AUTO_CHANGING(element))
+ ChangeElement(x, y);
+#endif
+ else if (element == EL_EXPLOSION)
+ ; /* drawing of correct explosion animation is handled separately */
+ else if (IS_ANIMATED(graphic) && !IS_CHANGING(x, y))
+ DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+
+#if 0
+ /* this may take place after moving, so 'element' may have changed */
+ if (IS_AUTO_CHANGING(Feld[x][y]))
+ ChangeElement(x, y);
+#endif
+
+ if (IS_BELT_ACTIVE(element))
+ PlayLevelSoundAction(x, y, ACTION_ACTIVE);
+
+ if (game.magic_wall_active)
+ {
+ int jx = local_player->jx, jy = local_player->jy;
+
+ /* play the element sound at the position nearest to the player */
+ if ((element == EL_MAGIC_WALL_FULL ||
+ element == EL_MAGIC_WALL_ACTIVE ||
+ element == EL_MAGIC_WALL_EMPTYING ||
+ element == EL_BD_MAGIC_WALL_FULL ||
+ element == EL_BD_MAGIC_WALL_ACTIVE ||
+ element == EL_BD_MAGIC_WALL_EMPTYING) &&
+ ABS(x-jx) + ABS(y-jy) < ABS(magic_wall_x-jx) + ABS(magic_wall_y-jy))
+ {
+ magic_wall_x = x;
+ magic_wall_y = y;
+ }
+ }
+ }
+
+#if USE_NEW_AMOEBA_CODE
+ /* new experimental amoeba growth stuff */
+#if 1
+ if (!(FrameCounter % 8))
+#endif
+ {
+ static unsigned long random = 1684108901;
+
+ for (i = 0; i < level.amoeba_speed * 28 / 8; i++)
+ {
+#if 0
+ x = (random >> 10) % lev_fieldx;
+ y = (random >> 20) % lev_fieldy;
+#else
+ x = RND(lev_fieldx);
+ y = RND(lev_fieldy);
+#endif
+ element = Feld[x][y];
+
+ /* !!! extend EL_SAND to anything diggable (but maybe not SP_BASE) !!! */
+ if (!IS_PLAYER(x,y) &&
+ (element == EL_EMPTY ||
+ element == EL_SAND ||
+ element == EL_QUICKSAND_EMPTY ||
+ element == EL_ACID_SPLASH_LEFT ||
+ element == EL_ACID_SPLASH_RIGHT))
+ {
+ if ((IN_LEV_FIELD(x, y-1) && Feld[x][y-1] == EL_AMOEBA_WET) ||
+ (IN_LEV_FIELD(x-1, y) && Feld[x-1][y] == EL_AMOEBA_WET) ||
+ (IN_LEV_FIELD(x+1, y) && Feld[x+1][y] == EL_AMOEBA_WET) ||
+ (IN_LEV_FIELD(x, y+1) && Feld[x][y+1] == EL_AMOEBA_WET))
+ Feld[x][y] = EL_AMOEBA_DROP;
+ }
+
+ random = random * 129 + 1;
+ }
+ }
+#endif
+
+#if 0
+ if (game.explosions_delayed)
+#endif
+ {
+ game.explosions_delayed = FALSE;
+
+ for (y = 0; y < lev_fieldy; y++) for (x = 0; x < lev_fieldx; x++)
+ {
+ element = Feld[x][y];
+
+ if (ExplodeField[x][y])
+ Explode(x, y, EX_PHASE_START, ExplodeField[x][y]);
+ else if (element == EL_EXPLOSION)
+ Explode(x, y, ExplodePhase[x][y], EX_NORMAL);
+
+ ExplodeField[x][y] = EX_NO_EXPLOSION;
+ }
+
+ game.explosions_delayed = TRUE;
+ }
+
+ if (game.magic_wall_active)
+ {
+ if (!(game.magic_wall_time_left % 4))
+ {
+ int element = Feld[magic_wall_x][magic_wall_y];
+
+ if (element == EL_BD_MAGIC_WALL_FULL ||
+ element == EL_BD_MAGIC_WALL_ACTIVE ||
+ element == EL_BD_MAGIC_WALL_EMPTYING)
+ PlayLevelSound(magic_wall_x, magic_wall_y, SND_BD_MAGIC_WALL_ACTIVE);
+ else
+ PlayLevelSound(magic_wall_x, magic_wall_y, SND_MAGIC_WALL_ACTIVE);
+ }
+
+ if (game.magic_wall_time_left > 0)
+ {
+ game.magic_wall_time_left--;
+ if (!game.magic_wall_time_left)
+ {
+ for (y = 0; y < lev_fieldy; y++) for (x = 0; x < lev_fieldx; x++)
+ {
+ element = Feld[x][y];
+
+ if (element == EL_MAGIC_WALL_ACTIVE ||
+ element == EL_MAGIC_WALL_FULL)
+ {
+ Feld[x][y] = EL_MAGIC_WALL_DEAD;
+ DrawLevelField(x, y);
+ }
+ else if (element == EL_BD_MAGIC_WALL_ACTIVE ||
+ element == EL_BD_MAGIC_WALL_FULL)
+ {
+ Feld[x][y] = EL_BD_MAGIC_WALL_DEAD;
+ DrawLevelField(x, y);
+ }
+ }
+
+ game.magic_wall_active = FALSE;
+ }
+ }
+ }
+
+ if (game.light_time_left > 0)
+ {
+ game.light_time_left--;
+
+ if (game.light_time_left == 0)
+ RedrawAllLightSwitchesAndInvisibleElements();
+ }
+
+ if (game.timegate_time_left > 0)
+ {
+ game.timegate_time_left--;
+
+ if (game.timegate_time_left == 0)
+ CloseAllOpenTimegates();
+ }
+
+ for (i = 0; i < MAX_PLAYERS; i++)
+ {
+ struct PlayerInfo *player = &stored_player[i];
+
+ if (SHIELD_ON(player))
+ {
+ if (player->shield_deadly_time_left)
+ PlayLevelSound(player->jx, player->jy, SND_SHIELD_DEADLY_ACTIVE);
+ else if (player->shield_normal_time_left)
+ PlayLevelSound(player->jx, player->jy, SND_SHIELD_NORMAL_ACTIVE);
+ }
+ }
+
+ if (TimeFrames >= FRAMES_PER_SECOND)
+ {
+ TimeFrames = 0;
+ TimePlayed++;
+
+ for (i = 0; i < MAX_PLAYERS; i++)
+ {
+ struct PlayerInfo *player = &stored_player[i];
+
+ if (SHIELD_ON(player))
+ {
+ player->shield_normal_time_left--;
+
+ if (player->shield_deadly_time_left > 0)
+ player->shield_deadly_time_left--;
+ }
+ }
+
+ if (tape.recording || tape.playing)
+ DrawVideoDisplay(VIDEO_STATE_TIME_ON, TimePlayed);
+
+ if (TimeLeft > 0)
+ {
+ TimeLeft--;
+
+ if (TimeLeft <= 10 && setup.time_limit)
+ PlaySoundStereo(SND_GAME_RUNNING_OUT_OF_TIME, SOUND_MIDDLE);
+
+ DrawText(DX_TIME, DY_TIME, int2str(TimeLeft, 3), FONT_TEXT_2);
+
+ if (!TimeLeft && setup.time_limit)
+ for (i = 0; i < MAX_PLAYERS; i++)
+ KillHero(&stored_player[i]);
+ }
+ else if (level.time == 0 && !AllPlayersGone) /* level without time limit */
+ DrawText(DX_TIME, DY_TIME, int2str(TimePlayed, 3), FONT_TEXT_2);
+ }
+
+ DrawAllPlayers();
+ PlayAllPlayersSound();
+
+ if (options.debug) /* calculate frames per second */
+ {
+ static unsigned long fps_counter = 0;
+ static int fps_frames = 0;
+ unsigned long fps_delay_ms = Counter() - fps_counter;
+
+ fps_frames++;
+
+ if (fps_delay_ms >= 500) /* calculate fps every 0.5 seconds */
+ {
+ global.frames_per_second = 1000 * (float)fps_frames / fps_delay_ms;
+
+ fps_frames = 0;
+ fps_counter = Counter();
+ }
+
+ redraw_mask |= REDRAW_FPS;
+ }
+
+#if 0
+ if (stored_player[0].jx != stored_player[0].last_jx ||
+ stored_player[0].jy != stored_player[0].last_jy)
+ printf("::: %d, %d, %d, %d, %d\n",
+ stored_player[0].MovDir,
+ stored_player[0].MovPos,
+ stored_player[0].GfxPos,
+ stored_player[0].Frame,
+ stored_player[0].StepFrame);
+#endif
+
+#if 1
+ FrameCounter++;
+ TimeFrames++;
+
+ for (i = 0; i < MAX_PLAYERS; i++)
+ {
+ int move_frames =
+ MOVE_DELAY_NORMAL_SPEED / stored_player[i].move_delay_value;
+
+ stored_player[i].Frame += move_frames;
+
+ if (stored_player[i].MovPos != 0)
+ stored_player[i].StepFrame += move_frames;
+
+ if (stored_player[i].drop_delay > 0)
+ stored_player[i].drop_delay--;
+ }
+#endif
+
+#if 1
+ if (local_player->show_envelope != 0 && local_player->MovPos == 0)
+ {
+ ShowEnvelope(local_player->show_envelope - EL_ENVELOPE_1);
+
+ local_player->show_envelope = 0;
+ }
+#endif
+}
+
+static boolean AllPlayersInSight(struct PlayerInfo *player, int x, int y)
+{
+ int min_x = x, min_y = y, max_x = x, max_y = y;
+ int i;
+
+ for (i = 0; i < MAX_PLAYERS; i++)
+ {
+ int jx = stored_player[i].jx, jy = stored_player[i].jy;
+
+ if (!stored_player[i].active || &stored_player[i] == player)
+ continue;
+
+ min_x = MIN(min_x, jx);
+ min_y = MIN(min_y, jy);
+ max_x = MAX(max_x, jx);
+ max_y = MAX(max_y, jy);
+ }
+
+ return (max_x - min_x < SCR_FIELDX && max_y - min_y < SCR_FIELDY);
+}
+
+static boolean AllPlayersInVisibleScreen()
+{
+ int i;
+
+ for (i = 0; i < MAX_PLAYERS; i++)
+ {
+ int jx = stored_player[i].jx, jy = stored_player[i].jy;
+
+ if (!stored_player[i].active)
+ continue;
+
+ if (!IN_VIS_FIELD(SCREENX(jx), SCREENY(jy)))
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+void ScrollLevel(int dx, int dy)
+{
+ int softscroll_offset = (setup.soft_scrolling ? TILEX : 0);
+ int x, y;
+
+ BlitBitmap(drawto_field, drawto_field,
+ FX + TILEX * (dx == -1) - softscroll_offset,
+ FY + TILEY * (dy == -1) - softscroll_offset,
+ SXSIZE - TILEX * (dx!=0) + 2 * softscroll_offset,
+ SYSIZE - TILEY * (dy!=0) + 2 * softscroll_offset,
+ FX + TILEX * (dx == 1) - softscroll_offset,
+ FY + TILEY * (dy == 1) - softscroll_offset);
+
+ if (dx)
+ {
+ x = (dx == 1 ? BX1 : BX2);
+ for (y = BY1; y <= BY2; y++)
+ DrawScreenField(x, y);
+ }
+
+ if (dy)
+ {
+ y = (dy == 1 ? BY1 : BY2);
+ for (x = BX1; x <= BX2; x++)
+ DrawScreenField(x, y);
+ }
+
+ redraw_mask |= REDRAW_FIELD;
+}
+
+static boolean canEnterSupaplexPort(int x, int y, int dx, int dy)
+{
+ int nextx = x + dx, nexty = y + dy;
+ int element = Feld[x][y];
+
+ if ((dx == -1 &&
+ element != EL_SP_PORT_LEFT &&
+ element != EL_SP_GRAVITY_PORT_LEFT &&
+ element != EL_SP_PORT_HORIZONTAL &&
+ element != EL_SP_PORT_ANY) ||
+ (dx == +1 &&
+ element != EL_SP_PORT_RIGHT &&
+ element != EL_SP_GRAVITY_PORT_RIGHT &&
+ element != EL_SP_PORT_HORIZONTAL &&
+ element != EL_SP_PORT_ANY) ||
+ (dy == -1 &&
+ element != EL_SP_PORT_UP &&
+ element != EL_SP_GRAVITY_PORT_UP &&
+ element != EL_SP_PORT_VERTICAL &&
+ element != EL_SP_PORT_ANY) ||
+ (dy == +1 &&
+ element != EL_SP_PORT_DOWN &&
+ element != EL_SP_GRAVITY_PORT_DOWN &&
+ element != EL_SP_PORT_VERTICAL &&
+ element != EL_SP_PORT_ANY) ||
+ !IN_LEV_FIELD(nextx, nexty) ||
+ !IS_FREE(nextx, nexty))
+ return FALSE;
+
+ return TRUE;
+}
+
+static void CheckGravityMovement(struct PlayerInfo *player)
+{
+ if (game.gravity && !player->programmed_action)
+ {
+ int move_dir_vertical = player->action & (MV_UP | MV_DOWN);
+ int move_dir_horizontal = player->action & (MV_LEFT | MV_RIGHT);
+ int move_dir =
+ (player->last_move_dir & (MV_LEFT | MV_RIGHT) ?
+ (move_dir_vertical ? move_dir_vertical : move_dir_horizontal) :
+ (move_dir_horizontal ? move_dir_horizontal : move_dir_vertical));
+ int jx = player->jx, jy = player->jy;
+ int dx = (move_dir & MV_LEFT ? -1 : move_dir & MV_RIGHT ? +1 : 0);
+ int dy = (move_dir & MV_UP ? -1 : move_dir & MV_DOWN ? +1 : 0);
+ int new_jx = jx + dx, new_jy = jy + dy;
+ boolean field_under_player_is_free =
+ (IN_LEV_FIELD(jx, jy + 1) && IS_FREE(jx, jy + 1));
+ boolean player_is_moving_to_valid_field =
+ (IN_LEV_FIELD(new_jx, new_jy) &&
+ (Feld[new_jx][new_jy] == EL_SP_BASE ||
+ Feld[new_jx][new_jy] == EL_SAND ||
+ (IS_SP_PORT(Feld[new_jx][new_jy]) &&
+ canEnterSupaplexPort(new_jx, new_jy, dx, dy))));
+ /* !!! extend EL_SAND to anything diggable !!! */