PrimitiveBoundsHandle.DrawHandle

描述

使用实例的当前配置在当前手柄摄像机中显示此实例的函数。

Always write properties to the handle before calling this function. Place the calls to this function inside EditorGUI.BeginChangeCheck and EditorGUI.EndChangeCheck to detect user interaction and read the updated properties from the handle.

The following component defines an object with a Bounds property.

using UnityEngine;

public class BoundsExample : MonoBehaviour
{
    public Bounds bounds { get { return m_Bounds; } set { m_Bounds = value; } }
    [SerializeField]
    private Bounds m_Bounds = new Bounds(Vector3.zero, Vector3.one);
}

借助以下自定义编辑器，用户可以在 Scene View 中编辑此组件的边界属性。

using UnityEditor;
using UnityEditor.IMGUI.Controls;
using UnityEngine;

[CustomEditor(typeof(BoundsExample)), CanEditMultipleObjects]
public class BoundsExampleEditor : Editor
{
    private BoxBoundsHandle m_BoundsHandle = new BoxBoundsHandle();

    // the OnSceneGUI callback uses the scene view camera for drawing handles by default
    protected virtual void OnSceneGUI()
    {
        BoundsExample boundsExample = (BoundsExample)target;

        // copy the target object's data to the handle
        m_BoundsHandle.center = boundsExample.bounds.center;
        m_BoundsHandle.size = boundsExample.bounds.size;

        // draw the handle
        EditorGUI.BeginChangeCheck();
        m_BoundsHandle.DrawHandle();
        if (EditorGUI.EndChangeCheck())
        {
            // record the target object before setting new values so changes can be undone/redone
            Undo.RecordObject(boundsExample, "Change Bounds");

            // copy the handle's updated data back to the target object
            Bounds newBounds = new Bounds();
            newBounds.center = m_BoundsHandle.center;
            newBounds.size = m_BoundsHandle.size;
            boundsExample.bounds = newBounds;
        }
    }
}

另请参阅：Editor.OnSceneGUI、Handles.SetCamera。