From f4136ae7ed253bd4fa3467a8b99f49e0f1fc1249 Mon Sep 17 00:00:00 2001
From: "seer-by-sentry[bot]"
 <157164994+seer-by-sentry[bot]@users.noreply.github.com>
Date: Sun, 4 Jan 2026 20:29:16 +0000
Subject: [PATCH] Prevent division by zero in particle emitter frametime
 calculation

---
 .../Libraries/Source/WWVegas/WW3D2/part_emt.cpp    | 14 ++++++++++----
 .../Libraries/Source/WWVegas/WW3D2/part_emt.cpp    | 14 ++++++++++----
 2 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/Generals/Code/Libraries/Source/WWVegas/WW3D2/part_emt.cpp b/Generals/Code/Libraries/Source/WWVegas/WW3D2/part_emt.cpp
index 37a1731b0e9..7ab21a450a3 100644
--- a/Generals/Code/Libraries/Source/WWVegas/WW3D2/part_emt.cpp
+++ b/Generals/Code/Libraries/Source/WWVegas/WW3D2/part_emt.cpp
@@ -554,11 +554,17 @@ void ParticleEmitterClass::Create_New_Particles(const Quaternion & curr_quat, co
 	if (frametime > 100 * EmitRate) {	// If the loop will run over 100 times
 		unsigned int buf_size = Buffer->Get_Buffer_Size();
 		unsigned int gcd = Greatest_Common_Divisor(buf_size, BurstSize);
-		unsigned int bursts = buf_size / gcd;
-		unsigned int cycle_time = EmitRate * bursts;
-		if (cycle_time > 1) {
-			frametime = frametime % cycle_time;
+		// Prevent division by zero - if gcd is 0, the buffer/burst parameters are degenerate
+		if (gcd > 0) {
+			unsigned int bursts = buf_size / gcd;
+			unsigned int cycle_time = EmitRate * bursts;
+			if (cycle_time > 1) {
+				frametime = frametime % cycle_time;
+			} else {
+				frametime = 1;
+			}
 		} else {
+			// Degenerate case: buffer size and burst size are both 0
 			frametime = 1;
 		}
 	}
diff --git a/GeneralsMD/Code/Libraries/Source/WWVegas/WW3D2/part_emt.cpp b/GeneralsMD/Code/Libraries/Source/WWVegas/WW3D2/part_emt.cpp
index 735610ee76c..bfb521a2792 100644
--- a/GeneralsMD/Code/Libraries/Source/WWVegas/WW3D2/part_emt.cpp
+++ b/GeneralsMD/Code/Libraries/Source/WWVegas/WW3D2/part_emt.cpp
@@ -563,11 +563,17 @@ void ParticleEmitterClass::Create_New_Particles(const Quaternion & curr_quat, co
 	if (frametime > 100 * EmitRate) {	// If the loop will run over 100 times
 		unsigned int buf_size = Buffer->Get_Buffer_Size();
 		unsigned int gcd = Greatest_Common_Divisor(buf_size, BurstSize);
-		unsigned int bursts = buf_size / gcd;
-		unsigned int cycle_time = EmitRate * bursts;
-		if (cycle_time > 1) {
-			frametime = frametime % cycle_time;
+		// Prevent division by zero - if gcd is 0, the buffer/burst parameters are degenerate
+		if (gcd > 0) {
+			unsigned int bursts = buf_size / gcd;
+			unsigned int cycle_time = EmitRate * bursts;
+			if (cycle_time > 1) {
+				frametime = frametime % cycle_time;
+			} else {
+				frametime = 1;
+			}
 		} else {
+			// Degenerate case: buffer size and burst size are both 0
 			frametime = 1;
 		}
 	}