Вы можете использовать простую маску для достижения этой цели.Вот рабочий пример (используя ЛЕВУЮ кнопку мыши, хотя. Я не думаю, что ПРАВА подойдет для этого):
package examples
{
import flash.display.Sprite;
import flash.display.Stage;
import flash.events.MouseEvent;
import flash.ui.Mouse;
public class MaskTest extends Example
{
private var _toBeErased:Sprite;
private var _discoverable:Sprite;
private var _holesContainer:Sprite;
private var _mouseIsPressed:Boolean = false;
public function MaskTest()
{
}
// Call this method once this Class instance has been added to stage
public function init():void
{
// Create sprites
_toBeErased = new Sprite();
addChild( _toBeErased );
_discoverable = new Sprite();
addChild( _discoverable );
_holesContainer = new Sprite();
addChild( _holesContainer );
// Draw sprites
_toBeErased.graphics.beginFill( 0xFFFF00 );
_toBeErased.graphics.drawRect( 0, 0, 900, 600 );
_toBeErased.graphics.endFill();
_discoverable.graphics.beginFill( 0xFFAAAA );
_discoverable.graphics.drawRect( 0, 0, 900, 600 );
_discoverable.graphics.endFill();
// Set mask
_discoverable.mask = _holesContainer;
// Add mouse listeners
stage.addEventListener( MouseEvent.MOUSE_MOVE, onMouseMove );
stage.addEventListener( MouseEvent.MOUSE_DOWN, onMouseDown );
stage.addEventListener( MouseEvent.MOUSE_UP, onMouseUp );
}
// Mouse listeners callbacks...
private function onMouseDown( e:MouseEvent ):void{
_mouseIsPressed = true;
}
private function onMouseUp( e:MouseEvent ):void{
_mouseIsPressed = false;
}
private function onMouseMove( e:MouseEvent ):void
{
if( !_mouseIsPressed )
return;
// Get a random size for circle
var radius:Number = 5 + (Math.random()*10-5);
// Create new circle and paint it
var circle:Sprite = new Sprite();
circle.graphics.beginFill( 0x000000 );
circle.graphics.drawCircle( 0, 0, radius );
circle.graphics.endFill();
// Move it randomly, just a bit
circle.x = _holesContainer.mouseX + (Math.random()*20-10);
circle.y = _holesContainer.mouseY + (Math.random()*20-10);
_holesContainer.addChild( circle );
}
}
}