tochie-kit/nodes/GridController.gd

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GDScript3
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extends Node
class_name TK_GridController
## Composable 4-way grid controller.
## Depends on placement below some Node2D below some GridContext.
signal moved(p_new_cell_position)
func _input(p_event: InputEvent):
var direction := InputUtils.input_event_to_4way_direction(p_event)
if direction == Vector2.ZERO:
return
var context := _get_grid_context()
var cell = context.position_to_cell_position(get_parent().global_position)
var new_cell = cell + direction
if context.is_cell_traversible(new_cell):
# todo: Should we move the outmost node2d?
get_parent().position += context.cell_size * direction
emit_signal("moved", new_cell)
func _get_grid_context() -> Node:
var current := self.get_parent().get_parent()
while current.name != "GridContext":
current = current.get_parent()
return current