minor comments changes

diff --git a/src/game_em/emerald.h b/src/game_em/emerald.h
index 05f42035e5b9c9e8761ffaf68e49f793bb9ec47c..8ddda6d3a6e1578701d4537a462e381249f55f49 100644 (file)
--- a/src/game_em/emerald.h
+++ b/src/game_em/emerald.h
@@ -63,6 +63,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   the element names (mostly) have the following properties:
   - elements that start with 'X' can be stored in a level file
   - elements that start with 'Y' indicate moving or active elements
+  - elements that start with 'Z' are internal elements without graphics
   - elements that end with 'B' are the "backside" of moving elements
   -----------------------------------------------------------------------------
 */
@@ -526,28 +527,18 @@ enum
   Ygrass_blank,
   Ydirt_blank,
 
-  Xboom_bug,           /* passed from explode to synchro (linked explosion);
-                          transition to explode_normal */
-  Xboom_bomb,          /* passed from explode to synchro (linked explosion);
-                          transition to explode_normal */
-  Xboom_android,       /* passed from explode to synchro;
-                          transition to boom_2 */
-  Xboom_1,             /* passed from explode to synchro;
-                          transition to boom_2 */
+  Xboom_bug,           /* bug explosion; transition to Zbug */
+  Xboom_bomb,          /* tank/alien/bomb explosion; transition to Ztank */
+  Xboom_android,       /* android explosion; transition to Xboom_2 */
+  Xboom_1,             /* tile explosion; transition to Xboom_2 */
   Xboom_2,             /* transition to boom[] */
 
-  Zbug,                        /* passed from synchro to explode, only in next[];
-                          no picture */
-  Ztank,               /* passed from synchro to explode, only in next[];
-                          no picture */
-  Zeater,              /* passed from synchro to explode, only in next[];
-                          no picture */
-  Zdynamite,           /* passed from synchro to explode, only in next[];
-                          no picture */
-  Zplayer,             /* special code to indicate player;
-                          no picture */
-  Zborder,             /* special code to indicate border;
-                          no picture */
+  Zbug,                        /* internal bug explosion */
+  Ztank,               /* internal tank/alien/bomb explosion */
+  Zeater,              /* internal eater explosion */
+  Zdynamite,           /* internal dynamite explosion */
+  Zplayer,             /* special code to indicate player */
+  Zborder,             /* special code to indicate border */
 
   TILE_MAX
 };