Added check for rotation by narrow distance between touch points.

lib/interaction.js

@@ -131,15 +131,17 @@ export class InteractionDelta {
      * @param {*} rotate
      * @param {*} about
      * @param {*} number - number of involved pointer
+     * @param {*} distance - distance of farthests touch points
      * @memberof InteractionDelta
      */
-    constructor(x, y, zoom, rotate, about, number) {
+    constructor(x, y, zoom, rotate, about, number, distance) {
         this.x = x
         this.y = y
         this.zoom = zoom
         this.rotate = rotate
         this.about = about
         this.number = number
+        this.distance = distance
     }
 
     toString() {
@@ -235,7 +237,8 @@ export class InteractionPoints {
                 zoom,
                 alpha,
                 cm,
-                csize
+                csize,
+                distance2
             )
         } else if (
             csize == 1 &&