initial commit: canny cat basic movement, bouncing, some gridmap tiles for levels

addons/godot_state_charts/utilities/state_chart_util.gd

@@ -0,0 +1,49 @@
+@tool
+
+## Finds the first ancestor of the given node which is a state
+## chart. Returns null when none is found.
+static func find_parent_state_chart(node:Node) -> StateChart:
+	if node is StateChart:
+		return node
+	
+	var parent = node.get_parent()
+	while parent != null:
+		if parent is StateChart:
+			return parent
+	
+		parent = parent.get_parent()
+	return null	
+	
+	
+## Returns an array with all event names currently used in the given
+## state chart.
+static func events_of(chart:StateChart) -> Array[StringName]:
+	var result:Array[StringName] = []
+	# now collect all events below the state chart
+	_collect_events(chart, result)
+	result.sort_custom(func(a, b): return a.naturalnocasecmp_to(b) < 0)
+	return result
+
+	
+static func _collect_events(node:Node, events:Array[StringName]):
+	if node is Transition:
+		if node.event != "" and not events.has(node.event):
+			events.append(node.event)
+	
+	for child in node.get_children():
+		_collect_events(child, events)
+
+
+## Returns all transitions of the given state chart.
+static func transitions_of(chart:StateChart) -> Array[Transition]:
+	var result:Array[Transition] = []
+	_collect_transitions(chart, result)
+	return result
+	
+	
+static func _collect_transitions(node:Node, result:Array[Transition]):
+	if node is Transition:
+		result.append(node)
+		
+	for child in node.get_children():
+		_collect_transitions(child, result)