# DrawLine(Vector3, Vector3, float)

> Draws a line from p1 to p2.

## Definition

* **Type:** Method
* **Namespace:** [UnityEditor](/engine/6000.7/script-reference/unityeditor.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public static void DrawLine(Vector3 p1, Vector3 p2, float thickness)
```

### Parameters

**** (\[Vector3]\(/engine/6000.7/script-reference/unityengine/vector3)): The position of the first line's end point in world space.**** (\[Vector3]\(/engine/6000.7/script-reference/unityengine/vector3)): The position of the second line's end point in world space.**** (\[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/6000.7/script-reference/unityeditor/handles/color.md) and [Handles.matrix](/engine/6000.7/script-reference/unityeditor/handles/matrix.md) properties colorize and additionally transform the line position. Unity ignores `DrawLine` (that is, nothing happens) when the current GUI event type is not [EventType.Repaint](/engine/6000.7/script-reference/unityengine/eventtype/repaint.md).

![DrawLine (DrawLine(Vector3, Vector3, float))](/api/media?file=/engine/6000.7/media/images/DrawLine.png)

*Draw Line in the Scene View.*

Below is an example of an Editor script that draws lines in SceneView to GameObjects listed in a script.

```csharp
// Draw lines to the connected game objects that a script has.
// If the target object doesnt have any game objects attached
// then it draws a line from the object to (0, 0, 0).

using UnityEditor;
using UnityEngine;

[CustomEditor(typeof(ConnectedObjectsExampleScript))]
class ConnectLineHandleExampleScript : Editor
{
    void OnSceneGUI()
    {
        ConnectedObjectsExampleScript connectedObjects = target as ConnectedObjectsExampleScript;
        if (connectedObjects.objs == null)
            return;

        Vector3 center = connectedObjects.transform.position;
        for (int i = 0; i < connectedObjects.objs.Length; i++)
        {
            GameObject connectedObject = connectedObjects.objs[i];
            if (connectedObject)
            {
                Handles.DrawLine(center, connectedObject.transform.position);
            }
            else
            {
                Handles.DrawLine(center, Vector3.zero);
            }
        }
    }
}
```

Example script to attach to a GameObject that will act as a handle:

```csharp
using UnityEngine;

public class ConnectedObjectsExampleScript : MonoBehaviour
{
    public GameObject[] objs = null;
}
```

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/6000.7/script-reference/unityeditor/editorguiutility/pixelsperpoint.md)).

![HandlesDrawLineThickness (DrawLine(Vector3, Vector3, float))](/api/media?file=/engine/6000.7/media/images/HandlesDrawLineThickness.png)

*Lines of varying thickness.*

```csharp
using UnityEngine;
using UnityEditor;

public class ExampleScript : MonoBehaviour
{
}

// Displays lines of various 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 linePos = position + Vector3.right * (i * 0.5f);
            Handles.DrawLine(linePos, linePos + Vector3.up, i);
        }
    }
}
```

Additional Resources: [Handles.lineThickness](/engine/6000.7/script-reference/unityeditor/handles/linethickness.md), [Handles.DrawLines](/engine/6000.7/script-reference/unityeditor/handles/drawlines.md), [Handles.DrawPolyLine](/engine/6000.7/script-reference/unityeditor/handles/drawpolyline.md), [Handles.DrawWireDisc](/engine/6000.7/script-reference/unityeditor/handles/drawwiredisc.md).