@mui/x-internal-gestures/core/utils/calculateRotationAngle.js

The core engine of GestureEvents, a modern and robust multi-pointer gesture detection library for JavaScript.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.calculateRotationAngle = calculateRotationAngle;
var _getAngle = require("./getAngle");
/**
 * Calculate the rotation angle between pointers
 * This uses the angle between the first two pointers relative to the centroid
 */
function calculateRotationAngle(pointers) {
  if (pointers.length < 2) {
    return 0;
  }

  // For rotation, we need exactly 2 pointers
  // Use first two since they're most likely the primary pointers
  const p1 = {
    x: pointers[0].clientX,
    y: pointers[0].clientY
  };
  const p2 = {
    x: pointers[1].clientX,
    y: pointers[1].clientY
  };
  return (0, _getAngle.getAngle)(p1, p2);
}