protected void DoStep(Vector2Int direction)
{
Vector2Int head_pos = fHeadPosition + direction;
if (CheckCollision(head_pos))
{
SnakeNode cur_node = fFirstNode;
SnakeNode prev_node = fLastNode;
MoveNodeAfter(fLastNode, fFirstNode);
fHeadPosition = head_pos;
cur_node.NodeType = SnakeNode_NodeType.Head;
cur_node.Direction = direction;
cur_node.M_Position = fHeadPosition;
prev_node.NodeType = SnakeNode_NodeType.Body;
prev_node.RefreshGraphic();
fFirstNode.NodeType = SnakeNode_NodeType.Tail;
fFirstNode.RefreshGraphic();
OnStep.Invoke(this);
}
}
protected void FullMoveTo(Vector2Int m_position)
{
SnakeNode node = fLastNode;
while (node != null)
{
node.NodeType = SnakeNode_NodeType.Body;
node.Direction = Vector2Int.zero;
node.M_Position = m_position;
m_position += Vector2Int.down;
node = node.PrevSibling;
}
if (fFirstNode != null)
{
fFirstNode.NodeType = SnakeNode_NodeType.Tail;
fLastNode.NodeType = SnakeNode_NodeType.Head;
if (fLastNode.PrevSibling != null)
{
fSpeedVector = fLastNode.M_Position - fLastNode.PrevSibling.M_Position;
}
else
{
fSpeedVector = Vector2Int.zero;
}
}
node = fLastNode;
while (node != null)
{
node.RefreshGraphic();
node = node.PrevSibling;
}
}