Zoom element to be panned with touchmove on another element? about zoom HOT 2 CLOSED

Found a solution that doesn't require separate div. Simply added a factor for faster zoom while using only one-finger touch:

var getCoordsSingle = function(t){
        var oX = elem.offsetLeft;
        var oY = elem.offsetTop;
        var x = (t[0].pageX - oX) * 12; // Factor for faster pan, the higher the further the panning.
        var y = (t[0].pageY - oY) * 12;
. . .

Seems simple enough but this way the thumb doesn't need to travel more than a centimeter while holding an iPad with two hands in order to pan the element. And when using two fingers however, the panning length/speed returns to its default, which allows more precise panning while rotating.

from zoom.

Glad it works, my thought process was finger should map to previous and current positions. It makes sense one may need faster zooms.

from zoom.