Implement basic EV_SHAKE event & adding 'shakes' key multiplier to sound

shaders. Client-side sound shaders will get proper shake duration matching
the sound sample length too. Fancy stuff you can try.

src/client/cstrike/defs.h

@@ -119,6 +119,12 @@ struct
 	int m_iFadeActive;
 	entity m_pWeaponFX;
 
+	/* shake */
+	float m_flShakeFreq;
+	float m_flShakeDuration;
+	float m_flShakeTime;
+	float m_flShakeAmp;
+
 	/* cstrike additions */
 	float m_iMoneyOld;
 	float m_flMoneyAlpha;

src/client/entry.c

@@ -292,6 +292,15 @@ CSQC_UpdateView(float w, float h, float focus)
 				setproperty(VF_ORIGIN, pSeat->m_vecCameraOrigin);
 				setproperty(VF_CL_VIEWANGLES, view_angles);
 			}
+
+			if (pSeat->m_flShakeDuration > 0.0) {
+				vector vecShake = [0,0,0];
+				vecShake[0] += random() * 3;
+				vecShake[1] += random() * 3;
+				vecShake[2] += random() * 3;
+				pl.punchangle += (vecShake * pSeat->m_flShakeAmp) * (pSeat->m_flShakeDuration / pSeat->m_flShakeTime);
+				pSeat->m_flShakeDuration -= clframetime;
+			}
 			setproperty(VF_ANGLES, view_angles + pl.punchangle);
 		}
 
@@ -585,11 +594,10 @@ CSQC_Parse_Event(void)
 		setproperty(VF_ANGLES, a);
 		break;
 	case EV_SHAKE:
-		float rad, amp, dur, freq;
-		rad = readfloat();
-		amp = readfloat();
-		dur = readfloat();
-		freq = readfloat();
+		pSeat->m_flShakeFreq = readfloat();
+		pSeat->m_flShakeDuration = readfloat();
+		pSeat->m_flShakeAmp = readfloat();
+		pSeat->m_flShakeTime = pSeat->m_flShakeDuration;
 	default:
 		Game_Parse_Event(fHeader);
 	}

src/client/valve/defs.h

@@ -112,6 +112,12 @@ struct
 	vector m_vecFadeColor;
 	int m_iFadeActive;
 
+	/* shake */
+	float m_flShakeFreq;
+	float m_flShakeDuration;
+	float m_flShakeTime;
+	float m_flShakeAmp;
+
 	entity m_pWeaponFX;
 } g_seats[4], *pSeat;
 

src/gs-entbase/server/env_shake.cpp

@@ -47,16 +47,7 @@ class env_shake:CBaseTrigger
 void
 env_shake::Trigger(entity act, int state)
 {
-	for (entity e = world; (e = find(e, ::classname, "player"));) {
-		WriteByte(MSG_MULTICAST, SVC_CGAMEPACKET);
-		WriteByte(MSG_MULTICAST, EV_SHAKE);
-		WriteFloat(MSG_MULTICAST, m_flRadius);
-		WriteFloat(MSG_MULTICAST, m_flAmplitude);
-		WriteFloat(MSG_MULTICAST, m_flDuration);
-		WriteFloat(MSG_MULTICAST, m_flFrequency);
-		msg_entity = e;
-		multicast([0,0,0], MULTICAST_ONE_R);
-	}
+	Client_ShakeOnce(origin, m_flRadius, m_flDuration, m_flFrequency, m_flAmplitude);
 }
 
 void

src/server/client.c

@@ -14,7 +14,8 @@
  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-void Client_TriggerCamera(entity target, vector pos, vector end, float wait)
+void
+Client_TriggerCamera(entity target, vector pos, vector end, float wait)
 {
 	WriteByte(MSG_MULTICAST, SVC_CGAMEPACKET);
 	WriteByte(MSG_MULTICAST, EV_CAMERATRIGGER);
@@ -29,7 +30,8 @@ void Client_TriggerCamera(entity target, vector pos, vector end, float wait)
 	multicast([0,0,0], MULTICAST_ONE);
 }
 
-void Client_FixAngle(entity target, vector ang)
+void
+Client_FixAngle(entity target, vector ang)
 {
 	WriteByte(MSG_MULTICAST, SVC_CGAMEPACKET);
 	WriteByte(MSG_MULTICAST, EV_ANGLE);
@@ -40,3 +42,23 @@ void Client_FixAngle(entity target, vector ang)
 	multicast([0,0,0], MULTICAST_ONE);
 }
 
+void
+Client_ShakeOnce(vector pos, float radius, float duration, float frequency, float amplitude)
+{
+	for (entity pl = world; (pl = find(pl, ::classname, "player"));) {
+		float amp;
+
+		if (vlen(pos - pl.origin) > radius)
+			continue;
+
+		amp = 1.0 - (vlen(pos - pl.origin) / radius);
+		WriteByte(MSG_MULTICAST, SVC_CGAMEPACKET);
+		WriteByte(MSG_MULTICAST, EV_SHAKE);
+		WriteFloat(MSG_MULTICAST, duration);
+		WriteFloat(MSG_MULTICAST, amplitude * amp);
+		WriteFloat(MSG_MULTICAST, frequency);
+
+		msg_entity = pl;
+		multicast([0,0,0], MULTICAST_ONE);
+	}
+};

src/server/defs.h

@@ -47,6 +47,8 @@ void Damage_Radius(vector, entity, float, float, int, int);
 void Damage_Apply(entity, entity, float, int, int);
 void Client_TriggerCamera(entity, vector, vector, float);
 void Client_FixAngle(entity, vector);
+void Client_ShakeOnce(vector pos, float radius, float duration, float frequency, float amplitude);
+
 void Game_Input(void);
 int Rules_IsTeamPlay(void);
 

src/server/valve/monster_alien_grunt.cpp

@@ -143,6 +143,7 @@ monster_alien_grunt::monster_alien_grunt(void)
 	Sound_Precache("monster_alien_grunt.die");
 	Sound_Precache("monster_alien_grunt.idle");
 	Sound_Precache("monster_alien_grunt.pain");
+
 	netname = "Alien Grunt";
 	model = "models/agrunt.mdl";
 	base_mins = [-32,-32,0];

src/shared/sound.c

@@ -79,7 +79,7 @@ Sound_ParseField(int i, int a)
 	case "shakes":
 		if (a == 2) {
 			dprint("\tShake set\n");
-			g_sounds[i].shake = stof(argv(1));
+			g_sounds[i].shakes = stof(argv(1));
 		}
 		break;
 	case "pitch":
@@ -342,6 +342,24 @@ Sound_Play(entity target, int chan, string shader)
 	print(sprintf("Sound_Play: %s\n", argv(r)));
 #endif
 
+#ifdef SERVER
+	if (g_sounds[sample].shakes > 0.0) {
+		Client_ShakeOnce(target.origin, 512, 2.5, 1.0, 1.0f);
+	}
+#else
+	if (g_sounds[sample].shakes > 0.0) {
+		float srad = 512;
+		float dist = vlen(pSeat->m_vecPredictedOrigin - target.origin);
+		if (dist < srad) {
+			float dif = 1.0 - (dist/srad);
+			pSeat->m_flShakeFreq = (1.0 * dif) * g_sounds[sample].shakes;
+			pSeat->m_flShakeAmp = (1.0 * dif) * g_sounds[sample].shakes;
+			pSeat->m_flShakeDuration = soundlength(argv(r));
+			pSeat->m_flShakeTime = pSeat->m_flShakeDuration;
+		}
+	}
+#endif
+
 	sound(
 		target,
 		chan, 

src/shared/sound.h

@@ -35,7 +35,7 @@ typedef struct
 	float offset;
 	float pitch_min;
 	float pitch_max;
-	float shake;
+	float shakes;
 	float volume;
 	int flags;
 	int playc;

src/shared/valve/fx_explosion.c

@@ -21,9 +21,7 @@ var int FX_EXPLOSION_BS;
 void
 FX_Explosion_Init(void)
 {
-	precache_sound("weapons/explode3.wav");
-	precache_sound("weapons/explode4.wav");
-	precache_sound("weapons/explode5.wav");
+	Sound_Precache("fx.explosion");
 	precache_model("sprites/fexplo.spr");
 	FX_EXPLOSION_MAIN = particleeffectnum("fx_explosion.main");
 	FX_EXPLOSION_BS = particleeffectnum("fx_explosion.blacksmoke");
@@ -47,7 +45,7 @@ FX_Explosion(vector vecPos)
 	env_sprite eExplosion = spawn(env_sprite);
 	setorigin(eExplosion, vecPos);
 	setmodel(eExplosion, "sprites/fexplo.spr");
-	sound(eExplosion, CHAN_WEAPON, sprintf("weapons/explode%d.wav", floor(random() * 3) + 3), 1, ATTN_NORM);
+	Sound_Play(eExplosion, CHAN_WEAPON, "fx.explosion");
 
 	//eExplosion.think = FX_Explosion_Animate;
 	eExplosion.effects = EF_ADDITIVE;

valve/data.pk3dir/sound/fx_valve.sndshd

@@ -0,0 +1,7 @@
+fx.explosion
+{
+	sample weapons/explode3.wav
+	sample weapons/explode4.wav
+	sample weapons/explode5.wav
+	shakes 1.5
+}