Implemented dumb keep-at-range behaviour

1 files changed, 12 insertions, 5 deletions

diff --git a/battles/src/BaseBattle.cpp b/battles/src/BaseBattle.cpp
index 8527a56..92ab351 100644
--- a/battles/src/BaseBattle.cpp
+++ b/battles/src/BaseBattle.cpp
@@ -30,6 +30,7 @@ BaseBattle::BaseBattle(const Scenario& scenario) :
 		_registry.emplace<Transform>(entity, spawner.get(ship.team));
 		_registry.emplace<FloatingMovement>(entity, 0.4);
 		_registry.emplace<AIState>(entity, Point{0.0, 0.0});
+		manager.add(ship.team, entity);  // registry supports on construction events
 	}
 }
 
@@ -44,16 +45,22 @@ BaseBattle::registry()
 void
 BaseBattle::update(const float dt)
 {
-	auto view = _registry.view<Transform, AIState, FloatingMovement>();
-	for (auto&& [entity, transform, state, movement] : view.each()) {
+	auto view = _registry.view<Team, Transform, AIState, FloatingMovement>();
+	for (auto&& [entity, team, transform, state, movement] : view.each()) {
+		if (!_registry.valid(state.target))
+			state.target = manager.random((team.id + 1) % 2);
+		const auto target = _registry.get<Transform>(state.target);
 		const double speed = movement.speed * dt;
-		const Point diff = (state.destination - transform.position);
-		if (diff.magnitude() > speed) {
-			const Point eff = diff.normalized().scale(speed);
+		const Point diff = target.position - transform.position;
+		const Point dest = target.position - diff.normalized();
+		const Point move = dest - transform.position;
+		if (move.magnitude() > speed) {
+			const Point eff = move.normalized().scale(speed);
 			transform.position.x += eff.x;
 			transform.position.y += eff.y;
 		}
 	}
+	manager.clear(_registry);  // registry supports on destructions events
 }