How to code a two finger pan?

Hi,

I rarely need to ask because I can usually find all the answers I need, but this time I can not ;-( Hope someone can help.

What I would like to do is be able to pan around a 2D scene when the user touches with two fingers and moves them across the screen.

Much like the navigation used in 'Ice Breaker'.

If any one can provide help or an example I would be very grateful.

 

Here is the code I have so far. But its just not great.

 

Easiest way I've found to do this is:

1) When two fingers are down store the average position of both fingers in a Vector2 (the centre point between them). Also store the xy of your 2d scene camera.

2) In each update loop get the new average position between the fingers

3) Subtract this position from the 1st position you recorded (in step1) to get the delta. Add this onto the stored xy camera and use that as your current camera position

Tony

 

This. Make sure there's two fingers (and impose a distance limit for them if you want), then pretend a point in between them is a "virtual finger." Now track that finger and see where it's going.