Файл: src/public/plugins/metrics-graphics/misc/transitions.js
Строк: 50
<?php
// http://bl.ocks.org/mbostock/3916621
function path_tween(d1, precision) {
return function() {
var path0 = this,
path1 = path0.cloneNode(),
n0 = path0.getTotalLength() || 0,
n1 = (path1.setAttribute("d", d1), path1).getTotalLength() || 0;
// Uniform sampling of distance based on specified precision.
var distances = [0], i = 0, dt = precision / Math.max(n0, n1);
while ((i += dt) < 1) distances.push(i);
distances.push(1);
// Compute point-interpolators at each distance.
var points = distances.map(function(t) {
var p0 = path0.getPointAtLength(t * n0),
p1 = path1.getPointAtLength(t * n1);
return d3.interpolate([p0.x, p0.y], [p1.x, p1.y]);
});
return function(t) {
return t < 1 ? "M" + points.map(function(p) { return p(t); }).join("L") : d1;
};
};
}
MG.path_tween = path_tween;
?>