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Current File : /home/opti/workflow/src/public/app-assets/vendors/js/charts/echarts/zrender/contain/line.js

define(function () {
    return {
        /**
         * 线段包含判断
         * @param  {number}  x0
         * @param  {number}  y0
         * @param  {number}  x1
         * @param  {number}  y1
         * @param  {number}  lineWidth
         * @param  {number}  x
         * @param  {number}  y
         * @return {boolean}
         */
        containStroke: function (x0, y0, x1, y1, lineWidth, x, y) {
            if (lineWidth === 0) {
                return false;
            }
            var _l = lineWidth;
            var _a = 0;
            var _b = x0;
            // Quick reject
            if (
                (y > y0 + _l && y > y1 + _l)
                || (y < y0 - _l && y < y1 - _l)
                || (x > x0 + _l && x > x1 + _l)
                || (x < x0 - _l && x < x1 - _l)
            ) {
                return false;
            }

            if (x0 !== x1) {
                _a = (y0 - y1) / (x0 - x1);
                _b = (x0 * y1 - x1 * y0) / (x0 - x1) ;
            }
            else {
                return Math.abs(x - x0) <= _l / 2;
            }
            var tmp = _a * x - y + _b;
            var _s = tmp * tmp / (_a * _a + 1);
            return _s <= _l / 2 * _l / 2;
        }
    };
});

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