Camera and touch event

Solar2D General Questions/Discussion
#1

Currently, to implement the camera function, I used the following function.

local myTouchListener = function( event )   
 if(event.phase == "began")then  
 lastTouchLocation = { x= event.x, y = event.y}   
 end  
  
 if(event.phase == "ended")then  
 lastTouchLocation = { x= event.x, y = event.y}  
 end  
  
 if(event.phase == "moved")then  
 local delta = { x = event.x - lastTouchLocation.x,   
 y = event.y - lastTouchLocation.y};  
 lastTouchLocation = { x= event.x, y = event.y}  
  
 localGroup.x = localGroup.x + delta.x  
 localGroup.y = localGroup.y + delta.y   
 end  
end

After the group is translated, how do I get the position of the group when I touch the screen instead of the screen coordinate? [import]uid: 70056 topic_id: 19657 reply_id: 319657[/import]