乌龟从当前位置移动到选定的目的地，而不是直接从一个节点移动到另一个节点

Question

我试图让一只海龟从它的当前节点位置移动到节点目的地，而不是让它从一个节点跳到另一个节点，而是从一个节点逐步移动到另一个节点。我查看了 Move Towards Target Example 和 Link-Walking Turtles Example 模型，并尝试在下面的代码中将它们结合起来，这似乎使海龟逐渐从一个节点移动到另一个节点，但只是以随机方式。

to walk
  let distance-from-current-location distance current-location
  ifelse 0.5 < distance from-current-location [
    fd 0.5 ]
  [
    let new-location one-of [ link-neighbors ] of current-location
    face new-location
    set current-location new-location
  ]
end

我想要的是乌龟在节点之间逐步行走，直到到达目的地。例如，我尝试了下面的代码，但乌龟最终离开了链接。

to walk
  if current-location != destination [
    let next-node item 1 [ nw:turtles-on-path-to [ destination ] of myself ] of current-location
    set current-location next-node
    ifelse distance current-location < 0.5 [
      move-to current-location ]
    [
      face current-location
      fd 0.5
    ]
end

如何让乌龟在其选定路径的节点之间移动，从当前位置到目的地，而不是直接从一个节点移动到另一个节点？例如，不是从节点1跳到节点2到节点3 ...到节点n，而是我希望海龟从节点1转发0.5到节点2 ...直到它到达目标节点。

谢谢。

Answer 1

我认为问题是 current-location 在乌龟实际到达它之前 被更新到下一个节点。试试这个：

to walk if current-location != destination [ ifelse distance current-location < 0.5 [ move-to current-location let next-node item 1 [ nw:turtles-on-path-to [ destination ] of myself ] of current-location set current-location next-node ] [ face current-location fd 0.5 ] end

因此，current-location 仅在乌龟实际到达时才会更改。不过，这让我觉得“current-location”是错误的名称。此外，使用此代码，乌龟将在最终节点 之前的节点 处停止。所以考虑让 next-node 成为海龟变量。然后试试这个代码：

to walk if current-location != destination [ ifelse distance next-node < 0.5 [ ;; Close enough to the next node; make it my current location ;; and target the next node on the list. set current-location next-node move-to current-location set next-node item 1 [ nw:turtles-on-path-to [ destination ] of myself ] of current-location ] [ ;; Not there yet; keep walking towards the next node. face next-node fd 0.5 ] end

乌龟从当前位置移动到选定的目的地，而不是直接从一个节点移动到另一个节点

Turtle moving from its current location to selected destination without moving straight from one node to another

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