84 lines
2.7 KiB
GDScript
84 lines
2.7 KiB
GDScript
@icon('uid://br8ndde8qty32')
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extends Node
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class_name Entity
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## Base entity class for everything not static.
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##
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## Should be the parent of every units, buildings,
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## npc, loot, and everything that the player can interact with
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##
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## Is a node, because we want to deactivate rendering when out of camera and only simulating the world.
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## Plus, only the entity is replicated in multiplayer
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func _ready() -> void:
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add_to_group('entity')
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add_to_group('selectable-entity')
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## Check if the entity is contained in the [Rect2] [param selection_box] of the player.
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## Need the [Camera3D] of the player to work
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func is_in_selection(selection_box:Rect2,player_cam:Camera3D) -> bool:
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if selection_box.size: # Checking if size is 0,0
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var p = player_cam.unproject_position(global_position)
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return selection_box.has_point(p)
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return false
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## Check if the entity is under the raycast (usually made by [method SelectionManager.check_raycast])
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## and colliding with entity bouding box
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func is_under_mouse(raycast:Dictionary) -> bool:
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if raycast:
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var aabb:AABB = get_entity_aabb()
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return aabb.has_point(raycast.position)
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return false
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## Calculate the node bouding box
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func get_entity_aabb(node: Node3D = self, ignore_top_level: bool = true, bounds_transform: Transform3D = Transform3D()) -> AABB:
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if node == null: return AABB()
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var box: AABB
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var node_transform: Transform3D
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# we are going down the child chain, we want the aabb of each subsequent node to be on the same axis as the parent
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if bounds_transform.is_equal_approx(Transform3D()):
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node_transform = node.global_transform
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else:
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node_transform = bounds_transform
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# no more nodes. return default aabb
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if node == null:
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return AABB(Vector3(-0.2, -0.2, -0.2), Vector3(0.4, 0.4, 0.4))
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# makes sure the transform we get isn't distorted
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var top_xform : Transform3D = node_transform.affine_inverse() * node.global_transform
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# convert the node into visualinstance3D to access get_aabb() function.
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var visual_result : VisualInstance3D = node as VisualInstance3D
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if visual_result != null:
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box = visual_result.get_aabb()
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else:
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box = AABB()
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# xforms the transform with the box aabb for proper alignment I believe?
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box = top_xform * box
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# recursion
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for i : int in node.get_child_count():
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var child : Node3D = node.get_child(i) as Node3D
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if child && !(ignore_top_level && child.top_level):
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var child_box : AABB = get_entity_aabb(child, ignore_top_level, transform)
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box = box.merge(child_box)
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return box
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func select():
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add_to_group('selected-by-'+str(get_tree().get_multiplayer().get_unique_id()))
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print(self.name," selected"," by "+str(get_tree().get_multiplayer().get_unique_id()))
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func deselect():
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remove_from_group('selected-by-'+str(get_tree().get_multiplayer().get_unique_id()))
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print(self.name," unselected")
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