Debug.DrawLine thickness

Unity Engine
1

Is there a way to make Debug.Drawline thicker?

2

Not really. Why is that important? They are just visible inside the editor as they are pure debugging tools.

3

I created a static “DebugDraw” utility class for this, and other similar tools.

Here’s my solution:

// Static editor utility class for drawing.
public static class DebugDraw
{

// Last known pixel-ratio of the scene view camera. This represents the world-space distance between each pixel.
// This cache gets around an issue where the scene view camera is null on certain editor frames.
private static float lastKnownSceneViewPixelRatio = 0.001f;

// Draws a line in the scene
public static void DrawLine(Vector3 start, Vector3 end, float thickness, Color color, float duration = 0f)
{
#if UNITY_EDITOR
    Vector3 lineDir = (end - start).normalized;
    Vector3 toCamera = Vector3.back;

    Camera camera = null;
    // Get the current scene view camera.
    if (SceneView.currentDrawingSceneView != null)
    {
        camera = SceneView.currentDrawingSceneView.camera;
    }
   
    if (camera == null)
    {
        // Default to the
        camera = Camera.current;
    }
    if (camera != null)
    {
        toCamera = (camera.transform.position - start).normalized;
        lastKnownSceneViewPixelRatio = (camera.orthographicSize * 2f) / camera.pixelHeight;
    }
   
    Vector3 orthogonal = Vector3.Cross(lineDir, toCamera).normalized;
    int pixelThickness = Mathf.CeilToInt(thickness);
    float totalThick = lastKnownSceneViewPixelRatio * pixelThickness;
    for(int i = 0; i < pixelThickness; i++)
    {
        Vector3 offset = orthogonal * ((i * lastKnownSceneViewPixelRatio) - (totalThick/2f));
        Debug.DrawLine(start + offset, end + offset, color, duration);
    }
#endif //UNITY_EDITOR
}

}
4

You can also adapt LineRenderer for the editor if you really want things to pop out.

5

Or use the Handles class instead: Unity - Scripting API: Handles.DrawLine

4 Likes
6

Wow I never noticed Handles.DrawLine had thickness. Is it any good? Now I have to try it.
I like pretty gizmos, almost 60% of my work is in gizmos.

Edit:
I’ve just seen that image on unity docs FOR THE FIRST TIME EVER, that’s crazy
who knows what else I’m missing out on

7

You may not be crazy. Handles line thickness was introduced in Unity 2021.

1 Like