Handles.PositionHandle 位置控制柄

static function PositionHandle (position : Vector3, rotation : Quaternion) : Vector3

Parameters参数

• position
  Center of the handle in 3D space
  在3D空间，控制柄的中心

Vector3 - the new position. If the user has not performed any operation, it will return the same value as you passed it in postion. Note: Use HandleUtility.GetHandleSize where you might want to have constant screen-sized handles.

返回三维向量，新的位置。如果用户没有执行任何操作，它将返回同样的值作为传递来的位置。注意，使用HandleUtility.GetHandleSize你可能希望有恒定屏幕大小的控制柄。

Description描述

Make a 3D Scene view position handle.

创建一个3D场景视图位置控制柄。

This will behave like the built-in move tool in Unity. If you have assigned something to Undo.SetSnapshotTarget, it will work fully with Undo. If you have assigned a non-null value to ignoreRaycastObjects, the center handle will support full raycast placement. To control the orientation of the handle, set Handles.matrix prior to calling this function.

这行为向Unity的内置移动工具。如果你已经指定东西到Undo.SetSnapshotTarget，它将可完全撤销。如果已经指定一个非空的值到ignoreRaycastObjects，控制柄的中心将支持完全光线投射位置。要控制手柄的方向，调用这个函数之前设置Handles.matrix。

Make the object look always to the position handle.
使物体总是看向位置控制柄。

//Create a position handle that always looks at "lookAtPoint" in LookAtPoint.js
//创建控制柄位置，总是看向lookAtPoint， LookAtPoint.js文件中

@CustomEditor (LookAtPoint)
class PositionHandleJS extends Editor {
	function OnSceneGUI () {
		target.lookAtPoint =
		Handles.PositionHandle (target.lookAtPoint, Quaternion.identity);
		if (GUI.changed)
			EditorUtility.SetDirty (target);
	}
}

And the Script attached to this handle:

该脚本附加到这个控制柄物体：

// LookAtPoint.js
// This Script has to be outside of the editor folder.
//这个脚本在编辑器文件夹之外
// Usage: Just Place this script on the object you want to work the handle with.
//用法：放置这个脚本到你需要控制柄的物体
@script ExecuteInEditMode()

var lookAtPoint = Vector3.zero;

function Update () {
	transform.LookAt (lookAtPoint);
}