423     R.angle = function (x1, y1, x2, y2, x3, y3) {  argument
426                 y = y1 - y2;
432             return R.angle(x1, y1, x3, y3) - R.angle(x2, y2, x3, y3);
1328     function bezlen(x1, y1, x2, y2, x3, y3, x4, y4, z) {  argument
1341                 ybase = base3(ct, y1, y2, y3, y4),
1347     function getTatLen(x1, y1, x2, y2, x3, y3, x4, y4, ll) {  argument
1348         if (ll < 0 || bezlen(x1, y1, x2, y2, x3, y3, x4, y4) < ll) {
1356         l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);
1360             l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);
1364     function intersect(x1, y1, x2, y2, x3, y3, x4, y4) {  argument
1368             mmax(y1, y2) < mmin(y3, y4) ||
1369             mmin(y1, y2) > mmax(y3, y4)
1373         var nx = (x1 * y2 - y1 * x2) * (x3 - x4) - (x1 - x2) * (x3 * y4 - y3 * x4),
1374             ny = (x1 * y2 - y1 * x2) * (y3 - y4) - (y1 - y2) * (x3 * y4 - y3 * x4),
1375             denominator = (x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4);
1389             py2 < +mmin(y1, y2).toFixed(2) ||
1390             py2 > +mmax(y1, y2).toFixed(2) ||
1492         var x1, y1, x2, y2, x1m, y1m, x2m, y2m, bez1, bez2,
1498                 y1 = y1m = pi[2];
1501                     bez1 = [x1, y1].concat(pi.slice(1));
1503                     y1 = bez1[7];
1505                     bez1 = [x1, y1, x1, y1, x1m, y1m, x1m, y1m];
1507                     y1 = y1m;
1815         l2c = function (x1, y1, x2, y2) {  argument
1816             return [x1, y1, x2, y2, x2, y2];
1818         q2c = function (x1, y1, ax, ay, x2, y2) {  argument
1823                     _13 * y1 + _23 * ay,
1830         a2c = function (x1, y1, rx, ry, angle, large_arc_flag, sweep_flag, x2, y2, recursive) {  argument
1843                 xy = rotate(x1, y1, -rad);
1845                 y1 = xy.y;
1852                     y = (y1 - y2) / 2;
1864                     cy = k * -ry * x / rx + (y1 + y2) / 2,
1865                     f1 = math.asin(((y1 - cy) / ry).toFixed(9)),
1902                 m1 = [x1, y1],
1903                 m2 = [x1 + hx * s1, y1 - hy * c1],
2252                         y1,
2259                             y1 = inver.y(0, 0);
2262                             m.translate(x2 - x1, y2 - y1);