48 lines
1.5 KiB
GDScript
48 lines
1.5 KiB
GDScript
tool
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extends TK_Context
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class_name TK_GridContext
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## todo: Cell visualization.
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## todo: Integration of TileMap.
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export var cell_size: Vector2 = Vector2(64, 64) setget _set_cell_size
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signal cell_size_changed(p_old_cell_size, p_new_cell_size)
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var _colliders: Dictionary # Node to null (set)
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func local_position_to_context_position(p_position: Vector2) -> Vector2:
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return p_position / cell_size
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func is_path_traversible(p_game_object: Node2D, p_from: Vector2, p_to: Vector2) -> bool:
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for collider in _colliders:
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if not collider.is_path_traversible(p_game_object, p_from, p_to):
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return false
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return true
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# todo: Effectful traversal.
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func try_moving(p_game_object: Node2D, p_from: Vector2, p_to: Vector2) -> bool:
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if not is_path_traversible(p_game_object, p_from, p_to):
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return false
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p_game_object.position = cell_size * p_to
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return true
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func register_collider(p_collider: Node) -> void:
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_colliders[p_collider] = null
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if p_collider.connect("child_exiting_tree", self, "_on_collider_exiting_tree") != OK:
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assert(false)
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func _on_collider_exiting_tree(p_collider) -> void:
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if not _colliders.erase(p_collider):
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pass
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func _set_cell_size(p_new_cell_size: Vector2) -> void:
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if p_new_cell_size.x == 0 or p_new_cell_size.y == 0:
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push_error("Cell size cannot be zero")
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return
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var cell_size_cache = cell_size
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cell_size = p_new_cell_size
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emit_signal("cell_size_changed", cell_size_cache, p_new_cell_size)
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