TraceRacer.PlayerObject.Update C# (CSharp) Method

        public override void Update(GameTime gameTime)
        {
            TouchCollection touchCollection = TouchPanel.GetState();
            if (touchCollection.Count != 0)
            {
                IsAlive = true;
            }

            if (isActive)
            {
                if (!gameOver)
                {
                    // Add points
                    int airborne = 1;
                    if (airtime > 10) { airborne = 3; } // add extra if he's in the air
                    Score.Points += Constants.POINTS * airborne;
                }
                //Position.X++;
                int difference = World.getPositionDifference();
                adjustSpeed(difference);
                // Check if touching the world
                if (difference == 0)
                {
                    // Touching world
                    airtime = 0;
                }
                else if (difference < 0)
                {
                    airtime++;
                    // In the air

                    float dropSize = Math.Abs(Position.Y + Texture.Height - (TouchPanel.DisplayHeight - World.getLine((int)Position.X).Height));
                    int yDiff = 3;

                    if (dropSize > 45)
                    {
                        yDiff = (airtime / (6 * gameTime.ElapsedGameTime.Milliseconds));
                    }

                    Position.Y += yDiff;

                    int diff2 = World.getPositionDifference();

                    while (diff2 > 0)
                    {
                        Position.Y -= 1;
                        diff2 = World.getPositionDifference();
                    }
                }
                else // difference > 0
                {
                    // Collision
                    airtime = 0;

                    if (difference > TouchPanel.DisplayHeight * 0.1)
                    {
                        IsAlive = false;
                        gameOver = true;
                        Position.Y = TouchPanel.DisplayHeight;
                    }

                    do
                    {
                        Position.Y--;
                    } while (World.getPositionDifference() > 0);
                }
                if ((Position.Y + Texture.Height) > TouchPanel.DisplayHeight)
                {
                    IsAlive = false;
                    gameOver = true;
                }
                base.Update(gameTime);
            }
        }