1 files changed, 81 insertions, 0 deletions
diff --git a/sim/src/weapons.cpp b/sim/src/weapons.cpp
new file mode 100644
index 0000000..bd130dc
--- /dev/null
+++ b/sim/src/weapons.cpp
@@ -0,0 +1,81 @@
+#include <kurator/sim/weapons.h>
+
+#include <entt/entt.hpp>
+
+#include <kurator/sim/events.h>
+#include <kurator/sim/FloatingMovement.h>
+#include <kurator/sim/HitPoints.h>
+#include <kurator/sim/State.h>
+#include <kurator/universe/TurretType.h>
+
+
+namespace kurator
+{
+namespace sim
+{
+
+
+static bool consume(float& dt, double& target);
+static bool reload_(float& dt, Turret& turret);
+
+
+void
+Turret::shoot_at(State& ctx, const entt::entity& target, const double distance)
+{
+	float remaining_dt = ctx.clock.dt;
+	while (reload_(remaining_dt, *this)) {
+		auto& target_points = ctx.registry.get<HitPoints>(target);
+		const auto& movement = ctx.registry.get<FloatingMovement>(target);
+		auto damage = type.effective_damage(distance, movement.speed.magnitude());
+		if (damage > 0.0) {
+			damage = target_points.deal(damage);
+			ctx.dispatcher.trigger(Hit{damage, owner, target});
+		}
+		delay = type.rate_of_fire;
+		if (--rounds < 1)
+			reload = type.reload;
+	}
+}
+
+
+void
+update_turrets(State& ctx)
+{
+	auto turrets = ctx.registry.view<Turret>();
+	for (auto&& [entity, turret] : turrets.each()) {
+		if (!ctx.registry.valid(turret.owner)) {
+			ctx.registry.destroy(entity);
+			continue;
+		}
+		float remaining_dt = ctx.clock.dt;
+		while (remaining_dt > 0.0) {
+			if (reload_(remaining_dt, turret))
+				break;
+		}
+	}
+}
+
+
+bool
+consume(float& dt, double& target)
+{
+	if (target <= 0.0)
+		return true;
+	const auto _dt = dt;
+	dt -= target;
+	target -= _dt;
+	return target <= 0.0;
+}
+
+
+bool
+reload_(float& dt, Turret& turret)  // at this point move it to the class?
+{
+	if (turret.rounds < 1 && consume(dt, turret.reload))
+		turret.rounds = turret.type.rounds;
+	return turret.rounds > 0 && consume(dt, turret.delay);
+}
+
+
+}  // namespace sim
+}  // namespace kurator