Question

I am currently building a game using C#/XNA on VS2012 and on my code I want the user to touch an object and drag it vertically and horizontally without lifting the finger when switching to vertical or horizontal gesture. Here is a sample of my code:

protected override void Update(GameTime gameTime)
    {
        // Allows the game to exit
        if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
            this.Exit();

        // Move the sprite by speed, scaled by elapsed time. 
        //shipPosition += shipSpeed; 

        // check whether gestures are available
        while (TouchPanel.IsGestureAvailable)
        {
            // read the next gesture
            GestureSample gesture = TouchPanel.ReadGesture();

            // has the user tapped the screen?
            switch (gesture.GestureType)
            {
                case GestureType.HorizontalDrag:

                    shipPosition += gesture.Delta;

                    break;
                case GestureType.VerticalDrag:

                    shipPosition += gesture.Delta;

                    break;
            }
        }

        // Make sure that the ship does not go out of bounds 
        shipPosition.X = MathHelper.Clamp(shipPosition.X, 35 / 2 , 765 + 35 / 2 - shipTexture.Width);
        shipPosition.Y = MathHelper.Clamp(shipPosition.Y, 21 / 2, 451 + 21 / 2 - shipTexture.Height);

        // TODO: Add your update logic here

        base.Update(gameTime);
    }

Can someone please advise? I saw somewhere that I have to use raw input touch but I would like to know how that works with drags.

Answer 1

Sounds like you need to use Touch Location instead

http://msdn.microsoft.com/en-us/library/ff434208.aspx

look under

Getting Multitouch Data from the Touch Input Device