Treat capital ship engines differently from components. Will cause vessel to stop moving when they are all destroyed. Don't contribute to ship health.

data/capitalShips/corvette.json

@@ -6,84 +6,86 @@
 	"texture" : "gfx/capitalShips/test/body.png",
 	"components" : [
 		{
-			"health" : 350,
+			"health" : 150,
 			"texture" : "gfx/capitalShips/test/core.png",
 			"x" : 0,
 			"y" : -125,
 			"flags" : "EF_TAKES_DAMAGE+EF_STATIC"
 		},
 		{
-			"health" : 350,
+			"health" : 50,
 			"texture" : "gfx/capitalShips/test/component.png",
 			"x" : -32,
 			"y" : -250,
 			"flags" : "EF_TAKES_DAMAGE+EF_STATIC"
 		},
 		{
-			"health" : 350,
+			"health" : 50,
 			"texture" : "gfx/capitalShips/test/component.png",
 			"x" : 32,
 			"y" : -250,
 			"flags" : "EF_TAKES_DAMAGE+EF_STATIC"
 		},
 		{
-			"health" : 350,
+			"health" : 50,
 			"texture" : "gfx/capitalShips/test/component.png",
 			"x" : -110,
 			"y" : -30,
 			"flags" : "EF_TAKES_DAMAGE+EF_STATIC"
 		},
 		{
-			"health" : 350,
+			"health" : 50,
 			"texture" : "gfx/capitalShips/test/component.png",
 			"x" : 110,
 			"y" : -30,
 			"flags" : "EF_TAKES_DAMAGE+EF_STATIC"
 		},
 		{
-			"health" : 350,
+			"health" : 50,
 			"texture" : "gfx/capitalShips/test/component.png",
 			"x" : 0,
 			"y" : 0,
 			"flags" : "EF_TAKES_DAMAGE+EF_STATIC"
 		},
 		{
-			"health" : 350,
+			"health" : 50,
 			"texture" : "gfx/capitalShips/test/component.png",
 			"x" : 0,
 			"y" : 50,
 			"flags" : "EF_TAKES_DAMAGE+EF_STATIC"
 		},
 		{
-			"health" : 350,
+			"health" : 50,
 			"texture" : "gfx/capitalShips/test/component.png",
 			"x" : 0,
 			"y" : 100,
 			"flags" : "EF_TAKES_DAMAGE+EF_STATIC"
-		},
+		}
+	],
+	"engines" : [
 		{
-			"health" : 250,
+			"health" : 100,
 			"texture" : "gfx/capitalShips/test/engine1.png",
 			"x" : -112,
 			"y" : 281,
 			"flags" : "EF_TAKES_DAMAGE+EF_STATIC"
 		},
 		{
-			"health" : 250,
+			"health" : 100,
 			"texture" : "gfx/capitalShips/test/engine1.png",
 			"x" : 112,
 			"y" : 281,
 			"flags" : "EF_TAKES_DAMAGE+EF_STATIC"
 		},
 		{
-			"health" : 250,
+			"health" : 100,
 			"texture" : "gfx/capitalShips/test/engine2.png",
 			"x" : -34,
 			"y" : 268,
 			"flags" : "EF_TAKES_DAMAGE+EF_STATIC"
 		},
 		{
-			"health" : 250,
+			"health" : 100,
 			"texture" : "gfx/capitalShips/test/engine2.png",
 			"x" : 34,
 			"y" : 268,

src/battle/capitalShips.c

@@ -23,9 +23,11 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 static void think(void);
 static void gunThink(void);
 static void componentDie(void);
+static void engineDie(void);
 static void loadCapitalShipDef(char *filename);
 static void loadComponents(Entity *parent, cJSON *components);
 static void loadGuns(Entity *parent, cJSON *guns);
+static void loadEngines(Entity *parent, cJSON *engines);
 
 static Entity defHead, *defTail;
 
@@ -107,10 +109,29 @@ static void componentDie(void)
 	addSmallExplosion();
 	playBattleSound(SND_EXPLOSION_1 + rand() % 4, self->x, self->y);
 	
-	if (self->type == ET_CAPITAL_SHIP_COMPONENT)
-	{
 	self->owner->health--;
+}
+
+static void engineDie(void)
+{
+	Entity *e;
+	
+	self->alive = ALIVE_DEAD;
+	addSmallExplosion();
+	playBattleSound(SND_EXPLOSION_1 + rand() % 4, self->x, self->y);
+	
+	for (e = battle.entityHead.next ; e != NULL ; e = e->next)
+	{
+		if (e != self && e->owner == self->owner && e->type == ET_CAPITAL_SHIP_ENGINE)
+		{
+			return;
 		}
+	}
+	
+	/* no more engines - stop moving */
+	self->owner->speed = 0;
+	self->owner->action = NULL;
+	self->owner->dx = self->owner->dy = 0;
 }
 
 static void die(void)
@@ -185,6 +206,8 @@ static void loadCapitalShipDef(char *filename)
 	
 	loadGuns(e, cJSON_GetObjectItem(root, "guns"));
 	
+	loadEngines(e, cJSON_GetObjectItem(root, "engines"));
+	
 	cJSON_Delete(root);
 	free(text);
 }
@@ -294,6 +317,50 @@ static void loadGuns(Entity *parent, cJSON *guns)
 	}
 }
 
+static void loadEngines(Entity *parent, cJSON *engines)
+{
+	Entity *e;
+	cJSON *engine;
+	
+	if (engines)
+	{
+		engine = engines->child;
+		
+		while (engine)
+		{
+			e = malloc(sizeof(Entity));
+			memset(e, 0, sizeof(Entity));
+			defTail->next = e;
+			defTail = e;
+			
+			e->active = 1;
+	
+			e->type = ET_CAPITAL_SHIP_ENGINE;
+			sprintf(e->name, "%s (Engine)", parent->name);
+			sprintf(e->defName, "%s (Engine)", parent->defName);
+			e->health = e->maxHealth = cJSON_GetObjectItem(engine, "health")->valueint;
+			e->offsetX = cJSON_GetObjectItem(engine, "x")->valueint;
+			e->offsetY = cJSON_GetObjectItem(engine, "y")->valueint;
+			e->texture = getTexture(cJSON_GetObjectItem(engine, "texture")->valuestring);
+			
+			if (cJSON_GetObjectItem(engine, "flags"))
+			{
+				e->flags = flagsToLong(cJSON_GetObjectItem(engine, "flags")->valuestring);
+			}
+			
+			SDL_QueryTexture(e->texture, NULL, NULL, &e->w, &e->h);
+			
+			e->systemPower = 100;
+			
+			e->die = engineDie;
+			
+			e->owner = parent;
+			
+			engine = engine->next;
+		}
+	}
+}
+
 void destroyCapitalShipDefs(void)
 {
 	Entity *e;

src/defs.h

@@ -110,6 +110,7 @@ enum
 	ET_EXTRACTION_POINT,
 	ET_CAPITAL_SHIP_COMPONENT,
 	ET_CAPITAL_SHIP_GUN,
+	ET_CAPITAL_SHIP_ENGINE,
 	ET_CAPITAL_SHIP
 };