/// <summary>
/// Move back to a previously stepped node, the lazy execution block and callbacks at the target dialogue entry
/// will be executed again.
/// </summary>
/// <param name="nodeName">the node to move to</param>
/// <param name="dialogueIndex">the index of the dialogue to move to</param>
/// <param name="variablesHash">hash of variables of the target</param>
/// <param name="clearFuture">clear saved checkpoints in the future</param>
public void MoveBackTo(string nodeName, int dialogueIndex, string variablesHash, bool clearFuture = false)
{
if (CheckActionRunning())
{
return;
}
// animation should stop
NovaAnimation.StopAll(AnimationType.All ^ AnimationType.UI);
// restore history
var backNodeIndex = walkedThroughNodes.FindLastIndex(x => x == nodeName);
Assert.IsFalse(backNodeIndex < 0,
$"Nova: move back to node {nodeName} that has not been walked through.");
// state should be normal when goes backward
state = State.Normal;
if (clearFuture)
{
// all save data of nodes to be removed are deleted
for (var i = backNodeIndex + 1; i < walkedThroughNodes.Count; i++)
{
checkpointManager.UnsetReach(walkedThroughNodes[i]);
}
// all save data of later dialogues are deleted
for (var i = dialogueIndex + 1; i < flowChartTree.GetNode(nodeName).dialogueEntryCount; i++)
{
checkpointManager.UnsetReach(nodeName, i);
}
}
var nodeHistoryRemoveLength = walkedThroughNodes.Count - backNodeIndex - 1;
walkedThroughNodes.RemoveRange(backNodeIndex + 1, nodeHistoryRemoveLength);
currentNode = flowChartTree.GetNode(walkedThroughNodes.Last());
currentIndex = dialogueIndex;
// restore status
var entry = checkpointManager.IsReached(nodeName, dialogueIndex, variablesHash);
if (entry == null)
{
Debug.LogWarning(
$"Nova: Unable to find node with varhash = {variablesHash}, falling back to any variable.");
entry = checkpointManager.IsReachedForAnyVariables(nodeName, dialogueIndex);
}
Restore(entry);
}
