1053 function angle(x1, y1, x2, y2, x3, y3) {
1055         var x = x1 - x2,
1062         return angle(x1, y1, x3, y3) - angle(x2, y2, x3, y3);
1200 Snap.len = function (x1, y1, x2, y2) {
1201     return Math.sqrt(Snap.len2(x1, y1, x2, y2));
1215 Snap.len2 = function (x1, y1, x2, y2) {
1216     return (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2);
1863                 x1,
1872                     x1 = inver.x(0, 0);
1876                     m.translate(x2 - x1, y2 - y1);
5037     proto.line = function (x1, y1, x2, y2) {  argument
5039         if (is(x1, "object")) {
5040             attr = x1;
5041         } else if (x1 != null) {
5043                 x1: x1,  property in proto.line.attr
5119                 var x1 = $(this.node, "x1") || 0,
5123                 return Snap._.box(x1, y1, math.abs(x2 - x1), math.abs(y2 - y1));
5172         function gradientLinear(defs, x1, y1, x2, y2) {  argument
5177             if (x1 != null) {
5179                     x1: x1,
5247         proto.gradientLinear = function (x1, y1, x2, y2) {  argument
5248             return gradientLinear(this.defs, x1, y1, x2, y2);
5525     function bezlen(x1, y1, x2, y2, x3, y3, x4, y4, z) {  argument
5537                 xbase = base3(ct, x1, x2, x3, x4),
5544     function getTotLen(x1, y1, x2, y2, x3, y3, x4, y4, ll) {  argument
5545         if (ll < 0 || bezlen(x1, y1, x2, y2, x3, y3, x4, y4) < ll) {
5553         l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);
5557             l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);
5561     function intersect(x1, y1, x2, y2, x3, y3, x4, y4) {  argument
5563             mmax(x1, x2) < mmin(x3, x4) ||
5564             mmin(x1, x2) > mmax(x3, x4) ||
5570         var nx = (x1 * y2 - y1 * x2) * (x3 - x4) - (x1 - x2) * (x3 * y4 - y3 * x4),
5571             ny = (x1 * y2 - y1 * x2) * (y3 - y4) - (y1 - y2) * (x3 * y4 - y3 * x4),
5572             denominator = (x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4);
5582             px2 < +mmin(x1, x2).toFixed(2) ||
5583             px2 > +mmax(x1, x2).toFixed(2) ||
5665         var x1, y1, x2, y2, x1m, y1m, x2m, y2m, bez1, bez2,
5670                 x1 = x1m = pi[1];
5674                     bez1 = [x1, y1].concat(pi.slice(1));
5675                     x1 = bez1[6];
5678                     bez1 = [x1, y1, x1, y1, x1m, y1m, x1m, y1m];
5679                     x1 = x1m;
5786                 x1 = x + rx * Math.cos(-ry * rad),
5790                 res = [["M", x1, y1], ["A", rx, rx, 0, +(a - ry > 180), 0, x2, y2]];
6043     function l2c(x1, y1, x2, y2) {  argument
6044         return [x1, y1, x2, y2, x2, y2];
6046     function q2c(x1, y1, ax, ay, x2, y2) {  argument
6050                 _13 * x1 + _23 * ax,
6058     function a2c(x1, y1, rx, ry, angle, large_arc_flag, sweep_flag, x2, y2, recursive) {  argument
6071             xy = rotate(x1, y1, -rad);
6072             x1 = xy.x;
6079                 x = (x1 - x2) / 2,
6091                 cx = k * rx * y / ry + (x1 + x2) / 2,
6096             f1 = x1 < cx ? PI - f1 : f1;
6130             m1 = [x1, y1],
6131             m2 = [x1 + hx * s1, y1 - hy * c1],
6159     function curveDim(x0, y0, x1, y1, x2, y2, x3, y3) {  argument
6165                 b = 6 * x0 - 12 * x1 + 6 * x2;
6166                 a = -3 * x0 + 9 * x1 - 9 * x2 + 3 * x3;
6167                 c = 3 * x1 - 3 * x0;
6204 …bounds[0][j] = (mt * mt * mt * x0) + (3 * mt * mt * t * x1) + (3 * mt * t * t * x2) + (t * t * t *…