Basic alien AI.

1 files changed, 44 insertions, 4 deletions

diff --git a/src/game/game.cpp b/src/game/game.cpp
index 71d24ac..b9a46db 100644
--- a/src/game/game.cpp
+++ b/src/game/game.cpp
@@ -16,8 +16,7 @@ void state_t::start(void)
 	units.insert(human);
 
 	alien = new alien_t;
-	alien->place(&world, v2f_t(5.5, 5.5));
-	units.insert(alien);
+	alien->place(&world, v2f_t(15.5, -2.5));
 }
 
 void state_t::stop(void)
@@ -41,6 +40,10 @@ void state_t::select(rectf_t x)
 			continue;
 
 		unit = (unit_t*)ent;
+
+		if (unit->type != unit_t::UNIT_HUMAN)
+			continue;
+
 		unit->selected = selection_cookie;
 		selected_units.insert(unit);
 	}
@@ -62,8 +65,45 @@ void state_t::tick(double now_, double dt_)
 	now = now_;
 	dt = dt_;
 
-	for (unit_t *unit : units)
-		unit->keep_moving(now, dt);
+	for (unit_t *unit : units) {
+		rectf_t wake_range;
+
+		wake_range[0] = unit->x - v2f_t(10, 10);
+		wake_range[1] = unit->x + v2f_t(10, 10);
+
+		for (world::entity_t *ent : world.get_entities(wake_range, -1)) {
+			unit_t *enemy;
+
+			if (ent->type != ET_UNIT)
+				continue;
+
+			enemy = (unit_t*)ent;
+			enemy->wake_time = now;
+
+			if (enemy->awake)
+				continue;
+
+			if (enemy->type == unit_t::UNIT_HUMAN)
+				continue;
+
+			enemy->awake = true;
+			awake_units.insert(enemy);
+			enemy->wake(now, unit);
+		}
+
+		unit->think(now, dt);
+	}
+
+	for (auto i = std::begin(awake_units); i != std::end(awake_units);) {
+		if (now - (*i)->wake_time >= 5.0) {
+			(*i)->awake = false;
+			(*i)->sleep(now);
+			i = awake_units.erase(i);
+		} else {
+			(*i)->think(now, dt);
+			i++;
+		}
+	}
 }
 
 bool load_assets(void)