/*
        public static void doZoom(float delta)
        {
            //m_log.Debug("[MOUSE]:" + p_event.MouseWheelDelta.ToString());
            Vector3 updated_positionc = new Vector3(camr.Position.X, camr.Position.Y, camr.Position.Z);

            Vector3 start = updated_positionc;
            Vector3 end = new Vector3(camr.Target.X, camr.Target.Y, camr.Target.Z);
            Vector3 direction = Vector3.Zero;
            if (delta > 0)
            {
                direction = updated_positionc + (Vector3.Normalize(end - start) * Math.Abs(delta * 2));
            }
            else
            {
                direction = updated_positionc + (Vector3.Normalize(start - end) * Math.Abs(delta * 2));
            }
            m_log.Debug("[NewPosition]:" + direction.ToString());

            Vector3D updated_position = new Vector3D(direction.X, direction.Y, direction.Z); ;
            //camr.Rotation

            camr.Position = updated_position;
        }
       */
       
        public static void doOrbit(float angleX, float angleY)
        {

            float DEG_TO_RAD = 0.01745329238f;
            
            Vector3D camrtrg = terrain.TerrainCenter;
            Vector3 targPos = new Vector3(camr.Target.X, camr.Target.Y, camr.Target.Z);
            Vector3 campos = new Vector3(camr.Position.X, camr.Position.Y, camr.Position.Z);
            Vector3 dir = (Vector3.Normalize(targPos - campos));

            float distance = Vector3.Distance(campos, new Vector3(camr.Target.X, camr.Target.Y, camr.Target.Z));// campos.X - targPos.X;
            //float distanceY = campos.Y - targPos.Y;
            if (angleX > 0)
            {
                for (int i = 0; i < angleX; i++)
                {
                    campos.X = (campos.X + (float)Math.Cos(distance));
                    campos.Z = (campos.Z + (float)Math.Sin(distance));
                }
            }
            if (angleX < 0)
            {
                for (int i = 0; i > angleX; i--)
                {
                    campos.X = (campos.X + (float)Math.Sin(distance));
                    campos.Z = (campos.Z + (float)Math.Cos(distance));
                }
            }
            if (angleY > 0)
            {
                //Vector2 spos = Vector2.Zero;
                float theta = (float)Math.Atan2(campos.Y, campos.X);
                float phi = (float)Math.Atan2(campos.Z, Math.Sqrt(campos.X * campos.X + campos.Y * campos.Y));
                
                //spos.Y = (float)(Math.Atan2(Math.Sqrt(campos.X * campos.X + campos.Z * campos.Z), campos.Y) / Math.PI);


                campos.Z = campos.Z + ((float)Math.Cos(theta) * (float)Math.Sin(phi)); //(campos.Y + (float)Math.Cos(distance));

                campos.X = campos.X + ((float)Math.Sin(theta) * (float)Math.Sin(phi));

                campos.Y = campos.Y + ((float)Math.Cos(phi));

            }
            if (angleY < 0)
            {

                //Vector2 spos = Vector2.Zero;
                float theta = (float)Math.Atan2(campos.Y, campos.X);
                float phi = (float)Math.Atan2(campos.Z, Math.Sqrt(campos.X * campos.X + campos.Y * campos.Y));

                //spos.Y = (float)(Math.Atan2(Math.Sqrt(campos.X * campos.X + campos.Z * campos.Z), campos.Y) / Math.PI);

                campos.Z = campos.Z + ((float)Math.Cos(theta) * (float)Math.Sin(phi)); //(campos.Y + (float)Math.Cos(distance));

                campos.X = campos.X + ((float)Math.Sin(theta) * (float)Math.Sin(phi));

                campos.Y = campos.Y + ((float)Math.Sin(phi));
            }

            //campos.X = (float)(campos.X / distanceX * (Math.Sin(Yaw))); //(float)(Math.Sin(Pitch) * Math.Cos(Yaw) * 90);// * distanceX);
            //campos.Z = (float)(targPos.Z / distanceX * (Math.Cos(Yaw)));//(Math.Sin(Yaw) * Math.Sin(Pitch) * 90);// * distanceX);
            //campos.Y = (float)(Math.Cos(Pitch) * 90);// * distanceX);

            //campos.X = (float)(Math.Cos(angleX) * Math.Cos(angleY) * distanceX);
            //campos.Z = (float)(Math.Sin(angleY) * distanceX);
            //campos.Y = (float)(Math.Cos(angleY) * Math.Sin(angleX) * distanceY);
            //float distance = Vector3.Distance(campos,new Vector3(camr.Target.X,camr.Target.Y,camr.Target.Z));

            //campos.X = (float)(targPos.X + Math.Cos(angle));
            //campos.Y = (float)(campos.Y + Math.Sin(angle));
            //campos.Z = (float)(targPos.Z + Math.Sin(angle));


            //campos.X = (float)(distance * Math.Cos(theta) * Math.Sin(phi));
            //campos.Y = (float)(distance * Math.Cos(phi));
            //campos.Z = (float)(distance * Math.Sin(theta) * Math.Sin(phi));
            camr.Position = new Vector3D(campos.X, campos.Y, campos.Z);
            camr.UpdateAbsolutePosition();
            camr.Target = camrtrg;

        }
      */