Рисование на PictureBox

private PictureBox _pb;      
 
foreach (Spawn obj in _widgetProvider.Objects) {
    var mapObject = new MapObject(obj, Client.Settings.WidgetColors[obj.ObjectType].PointColor);
 
    DrawObject(mapObject, graphics);
 
    if (!_isCursorInside) {
        continue;
    }
 
    //cursor over object
    var mapObjectBounds = _pb.RectangleToScreen(mapObject.Bounds);
    if (mapObjectBounds.Contains(Cursor.Position) && _selectedObject == null) {
        _selectedObject = mapObject;
    }
}  
 
 
private void DrawObject(MapObject obj, Graphics graphics) {
    //calculate offsets
    SolidBrush brush = new SolidBrush(obj.Color);
 
    var locationOffset = new Point(
        Me.Location.X - obj.Spawn.Location.X, 
        Me.Location.Y - obj.Spawn.Location.Y
        );
 
    var offsetOnMap = new Point(
        -(int)(locationOffset.X * Client.Settings.MapScale),
        -(int)(locationOffset.Y * Client.Settings.MapScale)
        );
 
    Point locationToDraw = new Point(
        _pb.Size.Width / 2 - DiameterOfPoint / 2 + offsetOnMap.X,
        _pb.Size.Height / 2 - DiameterOfPoint / 2 + offsetOnMap.Y
        );
 
    if (!Client.Settings.FixedMap) {
        Point center = new Point(_pb.Size.Width / 2, _pb.Size.Height / 2);
        double angle = (double)Client.Camera.RollHorizontal / ushort.MaxValue * -360.0 - 90;
        locationToDraw = RotatePoint(locationToDraw, center, angle);    
    }
 
    obj.Bounds = new Rectangle(
                        locationToDraw.X,
                        locationToDraw.Y,
                        DiameterOfPoint,
                        DiameterOfPoint
                        );
 
    graphics.FillEllipse(brush, obj.Bounds);
    graphics.DrawEllipse(Pens.Black, obj.Bounds);
}
 
private Point RotatePoint(Point pointToRotate, Point centerPoint, double angleInDegrees) {
    double angleInRadians = angleInDegrees * (Math.PI / 180);
    double cosTheta = Math.Cos(angleInRadians);
    double sinTheta = Math.Sin(angleInRadians);
    return new Point {
        X =
            (int)
            (cosTheta * (pointToRotate.X - centerPoint.X) -
            sinTheta * (pointToRotate.Y - centerPoint.Y) + centerPoint.X),
        Y =
            (int)
            (sinTheta * (pointToRotate.X - centerPoint.X) +
            cosTheta * (pointToRotate.Y - centerPoint.Y) + centerPoint.Y)
    };
}