flo-utils/lib/drawLineArrow.js

some utils

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

// 三角函数画直线中间的箭头
var drawLineArrow = function drawLineArrow(x1, y1, x2, y2) {
  var path;
  var Par = 10.0;
  var slopy = Math.atan2(y1 - y2, x1 - x2);
  var cosy = Math.cos(slopy);
  var siny = Math.sin(slopy);
  path = "M".concat(x1, ",").concat(y1);
  var x3 = (Number(x1) + Number(x2)) / 2;
  var y3 = (Number(y1) + Number(y2)) / 2;
  path += " L".concat(x3, ",").concat(y3);
  path += " L".concat(Number(x3) + Number(Math.ceil(Par * cosy - Par / 2.0 * siny)), ",").concat(Number(y3) + Number(Math.ceil(Par * siny + Par / 2.0 * cosy)));
  path += " L".concat(x3, ",").concat(y3);
  path += " L".concat(Number(x3) + Number(Math.ceil(Par * cosy + Par / 2.0 * siny)), ",").concat(Number(y3) - Number(Math.ceil(Par / 2.0 * cosy - Par * siny)));
  path += " L".concat(x3, ",").concat(y3, " L").concat(x2, ",").concat(y2);
  return path;
};

var _default = drawLineArrow;
exports.default = _default;