820     R.angle = function (x1, y1, x2, y2, x3, y3) {  argument
822             var x = x1 - x2,
829             return R.angle(x1, y1, x3, y3) - R.angle(x2, y2, x3, y3);
1714     function bezlen(x1, y1, x2, y2, x3, y3, x4, y4, z) {  argument
1726                 xbase = base3(ct, x1, x2, x3, x4),
1733     function getTatLen(x1, y1, x2, y2, x3, y3, x4, y4, ll) {  argument
1734         if (ll < 0 || bezlen(x1, y1, x2, y2, x3, y3, x4, y4) < ll) {
1742         l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);
1746             l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);
1750     function intersect(x1, y1, x2, y2, x3, y3, x4, y4) {  argument
1752             mmax(x1, x2) < mmin(x3, x4) ||
1753             mmin(x1, x2) > mmax(x3, x4) ||
1759         var nx = (x1 * y2 - y1 * x2) * (x3 - x4) - (x1 - x2) * (x3 * y4 - y3 * x4),
1760             ny = (x1 * y2 - y1 * x2) * (y3 - y4) - (y1 - y2) * (x3 * y4 - y3 * x4),
1761             denominator = (x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4);
1771             px2 < +mmin(x1, x2).toFixed(2) ||
1772             px2 > +mmax(x1, x2).toFixed(2) ||
1878         var x1, y1, x2, y2, x1m, y1m, x2m, y2m, bez1, bez2,
1883                 x1 = x1m = pi[1];
1887                     bez1 = [x1, y1].concat(pi.slice(1));
1888                     x1 = bez1[6];
1891                     bez1 = [x1, y1, x1, y1, x1m, y1m, x1m, y1m];
1892                     x1 = x1m;
2201         l2c = function (x1, y1, x2, y2) {  argument
2202             return [x1, y1, x2, y2, x2, y2];
2204         q2c = function (x1, y1, ax, ay, x2, y2) {  argument
2208                     _13 * x1 + _23 * ax,
2216         a2c = function (x1, y1, rx, ry, angle, large_arc_flag, sweep_flag, x2, y2, recursive) {  argument
2229                 xy = rotate(x1, y1, -rad);
2230                 x1 = xy.x;
2237                     x = (x1 - x2) / 2,
2249                     cx = k * rx * y / ry + (x1 + x2) / 2,
2254                 f1 = x1 < cx ? PI - f1 : f1;
2288                 m1 = [x1, y1],
2289                 m2 = [x1 + hx * s1, y1 - hy * c1],
2606                         x1,
2613                             x1 = inver.x(0, 0);
2617                             m.translate(x2 - x1, y2 - y1);
5869                     x1: vector[0],