demo/demo.js
function(element, transform, touch) {
          //
          // use translate both as basis for the new transform:
          //
          var t = $drag.TRANSLATE_BOTH(element, transform, touch);

          //
          // Add rotation:
          //
          var Dx = touch.distanceX;
          var t0 = touch.startTransform;
          var sign = Dx < 0 ? -1 : 1;
          var angle = sign * Math.min((Math.abs(Dx) / 700) * 30, 30);

          t.rotateZ = angle + (Math.round(t0.rotateZ));

          return t;
        }
function(element, transform, touch) {
          //
          // use translate both as basis for the new transform:
          //
          var t = $drag.TRANSLATE_BOTH(element, transform, touch);

          //
          // Add rotation:
          //
          var Dx = touch.distanceX;
          var t0 = touch.startTransform;
          var sign = Dx < 0 ? -1 : 1;
          var angle = sign * Math.min((Math.abs(Dx) / 700) * 30, 30);

          t.rotateZ = angle + (Math.round(t0.rotateZ));

          return t;
        }
function ( element , transform , touch ) { // // use translate both as basis for the new transform: // var t = $drag . TRANSLATE_BOTH ( element , transform , touch ) ; // // Add rotation: // var Dx = touch . distanceX ; var t0 = touch . startTransform ; var sign = Dx < 0 ? - 1 : 1 ; var angle = sign * Math . min ( ( Math . abs ( Dx ) / 700 ) * 30 , 30 ) ; t . rotateZ = angle + ( Math . round ( t0 . rotateZ ) ) ; return t ; }
This is an example of custom transform function
This is an example of custom transform function