Handles.FreeMoveHandle

参数

返回

Vector3 通过用户与手柄的交互修改的新值。如果用户没有移动手柄，则将返回您传递给相应函数的值。

描述

创建一个不受约束的移动手柄。

This handle can move freely in all directions. Hold down Ctrl (Cmd on macOS) to snap to the grid (see [wiki:PositioningGameObjects]). Hold Ctrl-Shift (Cmd-Shift on macOS) to snap the object to any Collider surface under the mouse pointer.


Free Move handle in the Scene View.

Add the following script to your Assets folder as FreeMoveHandleExample.cs and add the FreeMoveHandleExample component to an object in a scene.

using UnityEngine;

[ExecuteInEditMode]
public class FreeMoveHandleExample : MonoBehaviour
{
    public Vector3 targetPosition { get { return m_TargetPosition; } set { m_TargetPosition = value; } }
    [SerializeField]
    private Vector3 m_TargetPosition = new Vector3(1f, 0f, 2f);

    public virtual void Update()
    {
        transform.LookAt(m_TargetPosition);
    }
}

将以下脚本作为 FreeMoveHandleExampleEditor.cs 添加到 Assets/Editor，然后选择包含 FreeMoveHandleExample 组件的对象。

using UnityEditor;
using UnityEngine;

[CustomEditor(typeof(FreeMoveHandleExample)), CanEditMultipleObjects]
public class FreeMoveHandleExampleEditor : Editor
{
    protected virtual void OnSceneGUI()
    {
        FreeMoveHandleExample example = (FreeMoveHandleExample)target;

        float size = HandleUtility.GetHandleSize(example.targetPosition) * 0.5f;
        Vector3 snap = Vector3.one * 0.5f;

        EditorGUI.BeginChangeCheck();
        Vector3 newTargetPosition = Handles.FreeMoveHandle(example.targetPosition, Quaternion.identity, size, snap, Handles.RectangleHandleCap);
        if (EditorGUI.EndChangeCheck())
        {
            Undo.RecordObject(example, "Change Look At Target Position");
            example.targetPosition = newTargetPosition;
            example.Update();
        }
    }
}