Unity Script Reference:

static function DrawWireDisc(center: Vector3, normal: Vector3, radius: float): void;

static void DrawWireDisc(Vector3 center, Vector3 normal, float radius);

static def DrawWireDisc(center as Vector3, normal as Vector3, radius as float) as void

Parameters

center	The center of the dics.
normal	The normal of the disc.
radius	The radius of the dics Note: Use HandleUtility.GetHandleSize where you might want to have constant screen-sized handles.

Description

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

Wire Disc in the Scene View.

	// Create a wire disc with a ScaleValueHandle attached to the disc
	// that lets you drag the "areaOfEffect" var in the WireDiscExample.js
	
	@CustomEditor (WireDiscExample)
	class DrawWireDisc extends Editor {
	    function OnSceneGUI () {
	    	Handles.color = Color.red;
	        Handles.DrawWireDisc(target.transform.position, Vector3.up, target.areaOfEffect);
	        
	        target.areaOfEffect =
			Handles.ScaleValueHandle(target.areaOfEffect,
						target.transform.position + Vector3(target.areaOfEffect,0,0),
						Quaternion.identity,
						2,
						Handles.CylinderCap,
						2);
	    }
	}

And the script attached to this Handle:

	//WireDiscExample.js
	
	var areaOfEffect : float = 5;