From: Holger Schemel <info@artsoft.org>
Date: Sat, 28 Jan 2023 13:29:08 +0000 (+0100)
Subject: fixed overloading laser due to duplicated tiles in damage list in MM engine
X-Git-Tag: 4.3.5.0~25
X-Git-Url: https://git.artsoft.org/?a=commitdiff_plain;h=f8aec4470bbcfcd92e976580cee1b6e05e4e8683;p=rocksndiamonds.git

fixed overloading laser due to duplicated tiles in damage list in MM engine

Repeatedly adding tiles to the damage list that have already been
added before for the same laser edge can cause filling up the list
very quickly, causing the laser to overload as a result.
---

diff --git a/src/game_mm/mm_game.c b/src/game_mm/mm_game.c
index 63e892c5..641aa4fd 100644
--- a/src/game_mm/mm_game.c
+++ b/src/game_mm/mm_game.c
@@ -825,6 +825,13 @@ void AddLaserEdge(int lx, int ly)
 
 void AddDamagedField(int ex, int ey)
 {
+  // prevent adding the same field position again
+  if (laser.num_damages > 0 &&
+      laser.damage[laser.num_damages - 1].x == ex &&
+      laser.damage[laser.num_damages - 1].y == ey &&
+      laser.damage[laser.num_damages - 1].edge == laser.num_edges)
+    return;
+
   laser.damage[laser.num_damages].is_mirror = FALSE;
   laser.damage[laser.num_damages].angle = laser.current_angle;
   laser.damage[laser.num_damages].edge = laser.num_edges;