game: Implement breakable map entities

README.md

@@ -43,6 +43,7 @@ A legendary 90s era Quake 3 Arena mod.
 - [x] ~~Bind key to toggle speed (ki boost). HINT: HASTE POWERUP~~
 - [x] ~~Replace ammo to ki energy stamina~~
 - [x] ~~Third person traceable crosshair~~
+- [x] ~~Breakable map entities ("func_breakable")~~
 - [ ] Make ki energy regeneration, ki use, attacks, charging balance indicated on old docs
 - [ ] Powerlevel and Power Tiers indicated on old docs
 - [x] ~~Hit Stun (makes player can't use ki, melee, block and charge)~~

source/game/g_combat.c

@@ -676,6 +676,14 @@ void G_Damage( gentity_t *targ, gentity_t *inflictor, gentity_t *attacker,
 		if ( targ->use && targ->moverState == MOVER_POS1 ) {
 			targ->use( targ, inflictor, attacker );
 		}
+		// BFP - For breakable map entities
+		if ( targ->takedamage && targ->health > 0 ) {
+			if ( damage < 1 ) {
+				damage = 1;
+			}
+			take = damage;
+			targ->health = targ->health - take;
+		}
 		return;
 	}
 	// reduce damage by the attacker's handicap value

source/game/g_mover.c

@@ -1574,3 +1574,20 @@ void SP_func_pendulum(gentity_t *ent) {
 	ent->s.apos.trType = TR_SINE;
 	ent->s.apos.trDelta[2] = speed;
 }
+
+
+// BFP - Breakable map entities
+void func_breakable_use( gentity_t *ent, gentity_t *other, gentity_t *activator ) {
+	if ( ent->health <= 0 ) {
+		G_FreeEntity( ent );
+	}
+}
+
+void SP_func_breakable( gentity_t *ent ) {
+	trap_SetBrushModel( ent, ent->model );
+	ent->s.eType = ET_MOVER;
+	ent->r.contents = CONTENTS_SOLID;
+	ent->health = 100;
+	ent->takedamage = qtrue;
+	ent->use = func_breakable_use;
+}

source/game/g_spawn.c

@@ -143,6 +143,7 @@ void SP_func_button (gentity_t *ent);
 void SP_func_door (gentity_t *ent);
 void SP_func_train (gentity_t *ent);
 void SP_func_timer (gentity_t *self);
+void SP_func_breakable (gentity_t *ent); // BFP - Breakable map entities
 
 void SP_trigger_always (gentity_t *ent);
 void SP_trigger_multiple (gentity_t *ent);
@@ -186,7 +187,7 @@ void SP_team_CTF_blueplayer( gentity_t *ent );
 void SP_team_CTF_redspawn( gentity_t *ent );
 void SP_team_CTF_bluespawn( gentity_t *ent );
 
-void SP_item_botroam( gentity_t *ent ) {};
+void SP_item_botroam( gentity_t *ent ) { (void)ent; }
 
 spawn_t	spawns[] = {
 	// info entities don't do anything at all, but provide positional
@@ -207,6 +208,7 @@ spawn_t	spawns[] = {
 	{"func_pendulum", SP_func_pendulum},
 	{"func_train", SP_func_train},
 	{"func_group", SP_info_null},
+	{"func_breakable", SP_func_breakable},		// BFP - Breakable map entities
 	{"func_timer", SP_func_timer},			// rename trigger_timer?
 
 	// Triggers are brush objects that cause an effect when contacted

source/game/g_weapon.c

@@ -177,6 +177,12 @@ qboolean CheckMeleeAttack( gentity_t *attacker ) { // BFP - Melee
 		return qfalse;
 	}
 
+	// avoid if the entity isn't a player (e.g. a breakable map entity)
+	if ( traceTarget->s.eType != ET_PLAYER ) {
+		attacker->client->ps.pm_flags &= ~PMF_MELEE;
+		return qfalse;
+	}
+
 	// the target's corpse is starting to sink, avoid interacting with a sinking corpse, nothing special happens
 	if ( traceTarget->physicsObject ) {
 		attacker->client->ps.pm_flags &= ~PMF_MELEE;