From 75b03628ecc865297df22dd50c3bfdc527dbe718 Mon Sep 17 00:00:00 2001
From: Alexander Guryanov <caiiiycuk@gmail.com>
Date: Mon, 21 Sep 2026 16:21:19 +0300
Subject: [PATCH] Fix division by zero in cLighting::Animate before Init

---
 Source/Render/src/lighting.cpp | 19 ++++++++++++-------
 Source/Units/SecondGun.cpp     |  6 ++++++
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/Source/Render/src/lighting.cpp b/Source/Render/src/lighting.cpp
index f51fe38c1..aa4cbd424 100644
--- a/Source/Render/src/lighting.cpp
+++ b/Source/Render/src/lighting.cpp
@@ -143,13 +143,18 @@ void cLighting::Animate(float dt)
 {
 	dt*=1e-3f;
 	time+=dt;
-	while(time>=param.generate_time)
-	{
-		time-=param.generate_time;
-		PreGenerate g;
-		g.pos_begin=pos_begin;
-		g.pos_end=pos_end[rnd() % pos_end.size()];
-		pre_generate.push_back(g);
+	if (pos_end.empty()) {
+		//Init() not called yet, nothing to generate arcs towards
+		time = min(time, param.generate_time);
+	} else {
+		while(time>=param.generate_time)
+		{
+			time-=param.generate_time;
+			PreGenerate g;
+			g.pos_begin=pos_begin;
+			g.pos_end=pos_end[rnd() % pos_end.size()];
+			pre_generate.push_back(g);
+		}
 	}
 
 	float fade_dt=dt/param.fade_time;
diff --git a/Source/Units/SecondGun.cpp b/Source/Units/SecondGun.cpp
index 7ddd9a33a..01b0fb0eb 100644
--- a/Source/Units/SecondGun.cpp
+++ b/Source/Units/SecondGun.cpp
@@ -2211,6 +2211,12 @@ void terWeaponLighting::quant()
             //the fire is delayed thanks to startFireDelay() so it wont kill before arc is displayed
             if (!lighting_) {
                 lighting_ = new cLighting;
+                //Init before attaching so Animate() never sees empty pos_end
+                Vect3f v0,v1;
+                aimController()->getTargetingPosition(v0,v1);
+                std::vector<Vect3f> vect;
+                vect.push_back(target_pos);
+                lighting_->Init(v0, vect, setup().laserWidth / 2.0f);
                 terScene->AttachObj(lighting_);
             } else {
                 target_->SetHotCount(5);