Add TRIPMINE_BEAM_DUPLICATION_FIX macros for fixing beam duplication on level transition (#272)

CMakeLists.txt

@@ -64,6 +64,7 @@ option(CROWBAR_IDLE_ANIM "Enable crowbar idle animation" OFF)
 option(CROWBAR_DELAY_FIX "Enable crowbar attack delay fix" OFF)
 option(CROWBAR_FIX_RAPID_CROWBAR "Enable rapid crowbar fix" OFF)
 option(GAUSS_OVERCHARGE_FIX "Enable gauss overcharge fix" OFF)
+option(TRIPMINE_BEAM_DUPLICATION_FIX "Enable fix of tripmine beam duplication on level transition" OFF)
 option(OEM_BUILD "Enable OEM Build" OFF)
 option(HLDEMO_BUILD "Enable Demo Build" OFF)
 
@@ -136,6 +137,11 @@ if(GAUSS_OVERCHARGE_FIX)
 	add_definitions(-DGAUSS_OVERCHARGE_FIX)
 endif()
 
+if(TRIPMINE_BEAM_DUPLICATION_FIX)
+	message(STATUS "Tripmine beam duplication fix enabled")
+	add_definitions(-DTRIPMINE_BEAM_DUPLICATION_FIX)
+endif()
+
 if(OEM_BUILD)
 	message(STATUS "OEM build enabled")
 	add_definitions(-DOEM_BUILD)

dlls/tripmine.cpp

@@ -82,7 +82,9 @@ TYPEDESCRIPTION	CTripmineGrenade::m_SaveData[] =
 	DEFINE_FIELD( CTripmineGrenade, m_vecEnd, FIELD_POSITION_VECTOR ),
 	DEFINE_FIELD( CTripmineGrenade, m_flBeamLength, FIELD_FLOAT ),
 	DEFINE_FIELD( CTripmineGrenade, m_hOwner, FIELD_EHANDLE ),
+#if !TRIPMINE_BEAM_DUPLICATION_FIX
 	DEFINE_FIELD( CTripmineGrenade, m_pBeam, FIELD_CLASSPTR ),
+#endif
 	DEFINE_FIELD( CTripmineGrenade, m_posOwner, FIELD_POSITION_VECTOR ),
 	DEFINE_FIELD( CTripmineGrenade, m_angleOwner, FIELD_VECTOR ),
 	DEFINE_FIELD( CTripmineGrenade, m_pRealOwner, FIELD_EDICT ),
@@ -256,6 +258,9 @@ void CTripmineGrenade::MakeBeam( void )
 	Vector vecTmpEnd = pev->origin + m_vecDir * 2048.0f * m_flBeamLength;
 
 	m_pBeam = CBeam::BeamCreate( g_pModelNameLaser, 10 );
+#if TRIPMINE_BEAM_DUPLICATION_FIX
+	m_pBeam->pev->spawnflags |= SF_BEAM_TEMPORARY;
+#endif
 	m_pBeam->PointEntInit( vecTmpEnd, entindex() );
 	m_pBeam->SetColor( 0, 214, 198 );
 	m_pBeam->SetScrollRate( 255 );