# DrawWireArc(Vector3, Vector3, Vector3, float, float, float)

> Draws a circular arc in 3D space.

## Definition

* **Type:** Method
* **Namespace:** [UnityEditor](/engine/6000.3/script-reference/unityeditor.md)
* **Assembly:** UnityEditor

```csharp
public static void DrawWireArc(Vector3 center, Vector3 normal, Vector3 from, float angle, float radius, float thickness)
```

### Parameters

**** (\[Vector3]\(/engine/6000.3/script-reference/unityengine/vector3)): The center of the circle in world space.**** (\[Vector3]\(/engine/6000.3/script-reference/unityengine/vector3)): The normal of the circle in world space.**** (\[Vector3]\(/engine/6000.3/script-reference/unityengine/vector3)): The direction of the point on the circle circumference, relative to the center, where the arc begins.**** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): The angle of the arc, in degrees.**** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): The radius of the circle in world space units.**** (\[float]\(https\://learn.microsoft.com/dotnet/api/system.single)): Line thickness in UI points (zero thickness draws single-pixel line).

### Remarks

The [Handles.color](/engine/6000.3/script-reference/unityeditor/handles/color.md) and [Handles.matrix](/engine/6000.3/script-reference/unityeditor/handles/matrix.md) properties colorize and additionally transform the arc position. Unity ignores `DrawWireArc` (that is, nothing happens) when the current GUI event type is not [EventType.Repaint](/engine/6000.3/script-reference/unityengine/eventtype/repaint.md).

![DrawWireArc (DrawWireArc(Vector3, Vector3, Vector3, float, float, float))](/api/media?file=/engine/6000.3/media/images/DrawWireArc.png)

*Wire Arc in the Scene View.*

```csharp
using UnityEditor;
using UnityEngine;
using System.Collections;

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

// Create a 180 degrees wire arc with a ScaleValueHandle attached to the disc
// that lets you modify the "shieldArea" value in the WireArcExample
[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.ConeHandleCap, 1);
    }
}
```

You can use [HandleUtility.GetHandleSize](/engine/6000.3/script-reference/unityeditor/handleutility/gethandlesize.md) to calculate a suitable size for a manipulator handle.

Arc line `thickness` can be optionally set. Zero thickness draws a one-pixel line. Larger thickness values express line thickness in UI points. For example, a thickness of 1.0 could be two pixels wide on screen if the display zoom is 200% (see [EditorGUIUtility.pixelsPerPoint](/engine/6000.3/script-reference/unityeditor/editorguiutility/pixelsperpoint.md)).

![HandlesDrawWireArcThickness (DrawWireArc(Vector3, Vector3, Vector3, float, float, float))](/api/media?file=/engine/6000.3/media/images/HandlesDrawWireArcThickness.png)

*Arcs of varying thickness.*

```csharp
using UnityEngine;
using UnityEditor;

public class ExampleScript : MonoBehaviour
{
}

// Display arcs of various angles and thickness in the scene view
[CustomEditor(typeof(ExampleScript))]
public class ExampleEditor : Editor
{
    public void OnSceneGUI()
    {
        var t = target as ExampleScript;
        var tr = t.transform;
        var position = tr.position;
        Handles.color = Color.yellow;
        for (int i = 0; i < 10; ++i)
        {
            var center = position;
            var start = Vector3.left;
            var normal = Vector3.forward;
            var radius = 3 - i * 0.3f;
            var angle = 40 + 30 * i;
            Handles.DrawWireArc(center, normal, start, angle, radius, i);
        }
    }
}
```

Additional Resources: [Handles.lineThickness](/engine/6000.3/script-reference/unityeditor/handles/linethickness.md), [Handles.DrawLine](/engine/6000.3/script-reference/unityeditor/handles/drawline.md), [Handles.DrawSolidArc](/engine/6000.3/script-reference/unityeditor/handles/drawsolidarc.md), [Handles.DrawWireDisc](/engine/6000.3/script-reference/unityeditor/handles/drawwiredisc.md).