Add missing func_vehicle sound client side event

Fixes https://github.com/ValveSoftware/halflife/issues/3746

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 ### Bug fixes
 
+* Added missing client side event for `func_vehicle` sounds
 * Link Linux binaries with `-Wl` and `--no-undefined` flags to avoid situations where something was referenced but wasn't added in the build (Thanks a1batross)
 
 ## Changes in V1.1.0

FULL_UPDATED_CHANGELOG.md

@@ -293,6 +293,7 @@ Fixes for bugs introduced in beta builds are not included in this list.
 * Prevent breakables from spawning multiple items when destroyed by gunfire and explosives at the same time (Thanks Oxofemple.)
 * Added cvar `sv_allowbunnyhopping` to control whether the bunny hopping limiter is enabled (halflife issue [#11](https://github.com/ValveSoftware/halflife/issues/11))
 * Added `sv_load_all_maps` & `sv_stop_loading_all_maps` to help automate node graph generation
+* Added missing client side event for `func_vehicle` sounds
 
 ## Code cleanup
 

cl_dll/ev_hldm.cpp

@@ -1612,6 +1612,66 @@ void EV_TrainPitchAdjust(event_args_t* args)
 	}
 }
 
+void EV_VehiclePitchAdjust(event_args_t* args)
+{
+	int idx;
+	Vector origin;
+
+	unsigned short us_params;
+	int noise;
+	float m_flVolume;
+	int pitch;
+	bool stop;
+
+	char sz[256];
+
+	idx = args->entindex;
+
+	VectorCopy(args->origin, origin);
+
+	us_params = (unsigned short)args->iparam1;
+	stop = 0 != args->bparam1;
+
+	m_flVolume = (float)(us_params & 0x003f) / 40.0;
+	noise = (int)(((us_params) >> 12) & 0x0007);
+	pitch = (int)(10.0 * (float)((us_params >> 6) & 0x003f));
+
+	switch (noise)
+	{
+	case 1:
+		strcpy(sz, "plats/vehicle1.wav");
+		break;
+	case 2:
+		strcpy(sz, "plats/vehicle2.wav");
+		break;
+	case 3:
+		strcpy(sz, "plats/vehicle3.wav");
+		break;
+	case 4:
+		strcpy(sz, "plats/vehicle4.wav");
+		break;
+	case 5:
+		strcpy(sz, "plats/vehicle6.wav");
+		break;
+	case 6:
+		strcpy(sz, "plats/vehicle7.wav");
+		break;
+	default:
+		// no sound
+		strcpy(sz, "");
+		return;
+	}
+
+	if (stop)
+	{
+		gEngfuncs.pEventAPI->EV_StopSound(idx, CHAN_STATIC, sz);
+	}
+	else
+	{
+		gEngfuncs.pEventAPI->EV_PlaySound(idx, origin, CHAN_STATIC, sz, m_flVolume, ATTN_NORM, SND_CHANGE_PITCH, pitch);
+	}
+}
+
 bool EV_TFC_IsAllyTeam(int iTeam1, int iTeam2)
 {
 	return false;

cl_dll/ev_hldm.h

@@ -35,3 +35,4 @@ void EV_SnarkFire(event_args_t* args);
 
 
 void EV_TrainPitchAdjust(event_args_t* args);
+void EV_VehiclePitchAdjust(event_args_t* args);

cl_dll/hl/hl_events.cpp

@@ -42,6 +42,7 @@ void Game_HookEvents()
 	gEngfuncs.pfnHookEvent("events/gauss.sc", EV_FireGauss);
 	gEngfuncs.pfnHookEvent("events/gaussspin.sc", EV_SpinGauss);
 	gEngfuncs.pfnHookEvent("events/train.sc", EV_TrainPitchAdjust);
+	gEngfuncs.pfnHookEvent("events/vehicle.sc", EV_VehiclePitchAdjust);
 	gEngfuncs.pfnHookEvent("events/crowbar.sc", EV_Crowbar);
 	gEngfuncs.pfnHookEvent("events/crossbow1.sc", EV_FireCrossbow);
 	gEngfuncs.pfnHookEvent("events/crossbow2.sc", EV_FireCrossbow2);