Move to touch direction

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Hey,

I am creating a marble rolling game for android. I want the marble to roll to the direction of the touch.

I am looking for some advice abouth how to start.

Thanks!

Answer 1

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Answer by Statement · Dec 22, 2011 at 12:51 PM

I am guessing you're using rigidbodies for this? In that case you can use Rigidbody.AddTorque and/or Rigidbody.AddForce. Just make sure to use a physics material that have a little bit of friction or it'll spin on the spot or move without rolling.

I guess you can figure out the torque axis by rotating the direction vector (to your target) by 90 degrees.

For the location the ball should roll to, I suppose using Physics.Raycast would be a good starting point.

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Dreeka · Dec 22, 2011 at 02:34 PM 0

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Thanks for the tip! How can I deter$$anonymous$$ate the map coordinates of a touch?

Statement · Dec 22, 2011 at 03:34 PM 0

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Use the raycast to figure out where it hit. You'll get a world position from it. Check the link I posted about it.

Answer 2

Answer by efge · Dec 22, 2011 at 01:17 PM

You could take a look at Unity ressources:

Unity iPhone Examples: Roll-a-Ball Includes a scripts using a Rigidbody for the ball and the accelerator as an input for direction.
http://unity3d.com/support/resources/files/Roll-a-Ball.zip

Standard Assets (Mobile): Control Setups
especially TapControl, also used in the Penelope tutorial:
http://unity3d.com/support/resources/tutorials/penelope

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Dreeka · Dec 22, 2011 at 02:33 PM 0

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Thanks for the tip! :)

Move to touch direction

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