#4393 Follow-Up (Roll value) (#4424)

* Calculate camera roll from matrix when not in fixed mode (Follow up #4393)

Author: MohabCodeX

Client/mods/deathmatch/logic/CStaticFunctionDefinitions.cpp

@@ -31,6 +31,7 @@
 #include <game/TaskBasic.h>
 #include <enums/VehicleType.h>
 #include <enums/HandlingProperty.h>
+#include <numbers>
 
 using std::list;
 
@@ -5016,11 +5017,24 @@ bool CStaticFunctionDefinitions::GetCameraMatrix(CVector& vecPosition, CVector&
 
     fFOV = m_pCamera->GetAccurateFOV();
 
-    if (!m_pCamera->IsInFixedMode() && fRoll == 0.0f)
+    if (fRoll == 0.0f)
     {
-        CVector rotation;
-        m_pCamera->GetRotationDegrees(rotation);
-        fRoll = rotation.fZ;
+        // Calculate roll from camera matrix when not directly available
+        CMatrix matrix;
+        m_pCamera->GetMatrix(matrix);
+        
+        CVector worldUp(0.0f, 0.0f, 1.0f);
+        CVector cameraUp = matrix.vUp;
+        CVector cameraRight = matrix.vRight;
+        
+        // Project camera up vector onto plane perpendicular to camera front
+        CVector projectedUp = cameraUp - matrix.vFront * cameraUp.DotProduct(&matrix.vFront);
+        projectedUp.Normalize();
+        
+        float cosRoll = worldUp.DotProduct(&projectedUp);
+        float sinRoll = cameraRight.DotProduct(&worldUp);
+        
+        fRoll = std::atan2(sinRoll, cosRoll) * (180.0f / std::numbers::pi_v<float>);
     }
 
     return true;