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本帖最后由 柴火妞 于 2015-11-12 15:42 编辑

Node Canvas

Node Canvas是一个行为树的插件，它是图形化的操作模式，可以简化开发逻辑，官方文档在这 （）.

基本元素

流程上的原则是，一旦返回值为False则向上返回。一般在BehaviourTreeOwner组件上，要勾选Repeat循环监测。通常这些监测指的是各子树的条件判断。

常用的元素如下：

元素名称对应逻辑备注

Action操作各种操作，用过都说好

Condition条件判断各种判断，没它真不成

Selector选择器逻辑|| 如果有返回为真的子树，则停止执行，返回真

Sequencer顺序器逻辑&&与Selector相反，有返回假的，则返回假

Parallel并行器“同时”执行子树，返回值根据Policy取舍

Conditional条件节点如果不合条件，直接返回False，不执行子节点

Filter过滤器限制性访问，比如初始化时只进一次

Iterate迭代器做循环用

OverrideAgent复写变量对于子节点，不使用行为树挂载的Agent

快捷键

Here are the node/canvas controls and shortcuts:

Right Click on the canvas to add a new node.

Click & Drag to pan the node.

Middle Click & Drag in the canvas to pan the canvas.

Shift + Click & Drag a node to pan it and all of it’s children together; panning a branch.

Click & Drag from a port over a target node to connect. Right click a connected port to disconnect.

Click & Drag from a port into empty canvas space, will show context menu to automaticaly create and connect a new node.

Click a connected port or connection itself to select the connection.

Delete the selected node or connection with Delete Key, or through the right click context menu.

Duplicate a node with Control+D or through the right click context menu.

Double Clicking a node will open it’s script in the IDE, unless it’s a Nested Node in which case it will open the nested tree.

Relink a connection by click and dragging it over a new node.

Hit “F” will focus the canvas on the center of all your nodes within it.

Mouse Scroll Wheel will Zoom In/Out the canvas.

Left Click and Drag in the canvas, will allow you to create a selection rectangle.

Holding Control while making a rectangle selection will create a Canvas Group.

On right click on a node or connection, a context menu will show up. Depending on the node or connection type there might be different extra options. Following are the common operations:

Delete: Deletes the Node or Connection. (available in multiselection as well).

Copy Node: Copies the Node possible to Paste later. (available in multiselection as well)

Copy Assigned Task: Will copy the task that has been assigned to the Node or Connection.

Paste Assigned Task: Will paste the currently copied Task to the Node or Connection and assign it.




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