Handles.DrawWireArc

public static void DrawWireArc (Vector3 center, Vector3 normal, Vector3 from, float angle, float radius);

Parameters

center	圆形的中心。
normal	圆形的法线。
from	圆周上的点相对于圆心的方向，即圆弧的起点。
angle	圆弧的角度（以度为单位）。
radius	圆形的半径。注意：如果您希望拥有恒定屏幕大小的手柄，请使用 HandleUtility.GetHandleSize。

Description

在 3D 空间中绘制一个圆弧。

Wire Arc in the Scene View.

using UnityEditor;
using UnityEngine;
using System.Collections;

//this class should exist somewhere in your project
public class WireArcExample : MonoBehaviour
{
    public float shieldArea;

    // ...other code...
}

// Create a 180 degrees wire arc with a ScaleValueHandle attached to the disc
// that lets you modify the "shieldArea" var in the WireArcExample.js
[CustomEditor(typeof(WireArcExample))]
public class DrawWireArc : Editor
{
    void OnSceneGUI()
    {
        Handles.color = Color.red;
        WireArcExample myObj = (WireArcExample)target;
        Handles.DrawWireArc(myObj.transform.position, myObj.transform.up, -myObj.transform.right, 180, myObj.shieldArea);
        myObj.shieldArea = (float)Handles.ScaleValueHandle(myObj.shieldArea, myObj.transform.position + myObj.transform.forward * myObj.shieldArea, myObj.transform.rotation, 1, Handles.ConeCap, 1);
    }
}

附加到此手柄的脚本：

no example available in C#

Scripting API

Handles.DrawWireArc

Parameters

Description