1 files changed, 113 insertions, 0 deletions
diff --git a/scripts/turret.gd b/scripts/turret.gd
new file mode 100644
index 0000000..cc90dd4
--- /dev/null
+++ b/scripts/turret.gd
@@ -0,0 +1,113 @@
+extends Spatial
+
+var _path
+var _enemies
+var _projectiles_holder
+
+var _base
+var _gun
+var _shooting_point
+var _normal
+
+var aim_mode = "first"
+var _target = null
+
+var _range = 10
+
+var projectile
+
+var cooldown = 0.1
+var cooldown_timer = 0
+
+func _ready():
+	_path = get_tree().root.get_child(0).find_node("path")
+	_enemies = get_tree().root.get_child(0).find_node("enemies")
+	_projectiles_holder = get_tree().root.get_child(0).find_node("projectiles")
+	
+	projectile = load("res://scenes/projectiles/bullet.tscn")
+	
+func refresh_normal ():
+	_normal = transform.basis * Vector3.UP
+	_shooting_point = transform.origin + 0.25 * _normal
+	
+func refresh_model():
+	_base = get_node("model").find_node("pivot*").find_node("base*")
+	_gun = _base.find_node("gun*")
+	
+func filter_in_range(set):
+	var filtered = []
+	for target in set:
+		var node = _enemies.node_from_id(target)
+		var dist = (node.transform.origin - _shooting_point).length_squared()
+		if dist < _range*_range:
+			filtered += [target]
+	return filtered
+	
+func filter_visible(set):
+	var space: PhysicsDirectSpaceState = get_world().direct_space_state as PhysicsDirectSpaceState
+	var from = _shooting_point
+	
+	var filtered = []
+	for target in set:
+		var node = _enemies.node_from_id(target)
+		var to = node.transform.origin
+		var result = space.intersect_ray(from, to, _path.nodes, 1)
+		if result.size() > 0:
+			var hit = result.collider.get_parent()
+			if hit == node:
+				filtered += [ target ]
+	return filtered
+
+func get_target():
+	var ids = []
+	for id in _enemies.enemies: ids.append(id)
+	var set = ids
+	set = filter_in_range(set)
+	set = filter_visible(set)
+	
+	if set.size() > 0:
+		return set[0]
+	else: return null
+
+func _physics_process(delta):
+	if !_enemies.enemies.has(_target):
+		_target = null
+	else:
+		if _enemies.enemies[_target].hp <= 0:
+			_target = null
+		
+	if _target == null: 
+		_target = get_target()
+	
+	_target = get_target()
+		
+	if _target != null:
+		var enemy = _enemies.node_from_id(_target)
+		var direction = (enemy.transform.origin - _shooting_point).normalized()
+		
+		var proj_normal = direction - _normal.dot(direction) * _normal
+		var base_rot = Transform().looking_at(proj_normal, _normal).basis.get_rotation_quat()
+			
+		var perp = proj_normal.cross(_normal).normalized()
+		var proj_forward = direction - perp.dot(direction) * perp
+		var gun_rot = Transform().looking_at(proj_forward, perp).basis.get_rotation_quat()
+			
+		gun_rot = Quat(direction, PI/2) * gun_rot
+		
+		_base.global_transform.basis = Basis(base_rot)
+		_gun.global_transform.basis = Basis(gun_rot)
+		
+		cooldown_timer += delta
+		if cooldown_timer > cooldown:
+			cooldown_timer -= cooldown
+			shoot(direction)
+
+func shoot (dir):
+	shoot_projectile(dir)
+
+func shoot_projectile (dir):
+	var instance = projectile.instance()
+	_projectiles_holder.add_child(instance)
+	instance.transform = Transform().looking_at(dir, _normal)
+	instance.transform.origin = _shooting_point + dir*0.3;
+	instance.shooter = self