Handles.DrawWireDisc

Parameters

Description

Draw the outline of a flat disc in 3D space.

Wire Disc in the Scene View.

Note: Use HandleUtility.GetHandleSize if you want the handle to always remain the same size on the screen.

To use this example, save this script in the Assets/Editor folder:

#pragma strict
@CustomEditor(DrawWireDisc)
public class DrawWireDiscEditor extends Editor {
	function OnSceneGUI() {
		var t: DrawWireDisc = target as DrawWireDisc;
		Handles.color = Color.blue;
		Handles.Label(t.transform.position + Vector3.up * 2, t.transform.position.ToString() + "\nShieldArea: " + t.shieldArea.ToString());
		Handles.BeginGUI();
		GUILayout.BeginArea(new Rect(Screen.width - 100, Screen.height - 80, 90, 50));
		if (GUILayout.Button("Reset Area"))
			t.shieldArea = 5;
		GUILayout.EndArea();
		Handles.EndGUI();
		Handles.color = new Color(1, 1, 1, 0.2f);
		Handles.DrawWireDisc(t.transform.position, t.transform.up, t.shieldArea);
		Handles.color = Color.white;
		t.shieldArea = Handles.ScaleValueHandle(t.shieldArea, t.transform.position + t.transform.forward * t.shieldArea, t.transform.rotation, 1, Handles.ConeCap, 1);
	}
}

using UnityEngine;
using UnityEditor;

[CustomEditor( typeof( DrawWireDisc ) )]
public class DrawWireDiscEditor : Editor
{
	void OnSceneGUI( )
	{
		DrawWireDisc t = target as DrawWireDisc;

		Handles.color = Color.blue;
		Handles.Label( t.transform.position + Vector3.up * 2,
							 t.transform.position.ToString( ) + "\nShieldArea: " +
							 t.shieldArea.ToString( ) );

		Handles.BeginGUI( );
		GUILayout.BeginArea( new Rect( Screen.width - 100, Screen.height - 80, 90, 50 ) );

		if( GUILayout.Button( "Reset Area" ) )
			t.shieldArea = 5;

		GUILayout.EndArea( );
		Handles.EndGUI( );

		Handles.color = new Color( 1, 1, 1, 0.2f );
		Handles.DrawWireDisc( t.transform.position, t.transform.up, t.shieldArea );
		
		Handles.color = Color.white;
		t.shieldArea = Handles.ScaleValueHandle( t.shieldArea,
						t.transform.position + t.transform.forward * t.shieldArea,
						t.transform.rotation, 1, Handles.ConeCap, 1 );
	}
}

...and place this script on the GameObject where you want the disc to appear:

#pragma strict
@ExecuteInEditMode
public class DrawWireDisc extends MonoBehaviour {
	public var shieldArea: float = 5;
}

using UnityEngine;
          
[ExecuteInEditMode]
public class DrawWireDisc : MonoBehaviour
{
	public float shieldArea = 5;
}