Method isInsidePolygon

src/common/overlay/levelRenderer/Area.js:640–653

* @function LevelRenderer.Tool.Areal.prototype.isInsidePolygon * @description 图形 Polygon 是否包含鼠标位置, true表示坐标处在图形内。与 canvas 一样采用 non-zero winding rule * @returns {boolean} 图形是否包含鼠标位置, true表示坐标处在图形内。

(points, x, y)

     * @returns {boolean} 图形是否包含鼠标位置, true表示坐标处在图形内。
     */
    isInsidePolygon(points, x, y) {
        var N = points.length;
        var w = 0;

        for (var i = 0, j = N - 1; i < N; i++) {
            var x0 = points[j][0];
            var y0 = points[j][1];
            var x1 = points[i][0];
            var y1 = points[i][1];
            w += this.windingLine(x0, y0, x1, y1, x, y);
            j = i;
        }
        return w !== 0;
    }


    /**