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import {Basis} from "./basis.js";
function Bundle(context, beta) {
this._basis = new Basis(context);
this._beta = beta;
}
Bundle.prototype = {
lineStart: function() {
this._x = [];
this._y = [];
this._basis.lineStart();
},
lineEnd: function() {
var x = this._x,
y = this._y,
j = x.length - 1;
if (j > 0) {
var x0 = x[0],
y0 = y[0],
dx = x[j] - x0,
dy = y[j] - y0,
i = -1,
t;
while (++i <= j) {
t = i / j;
this._basis.point(
this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),
this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)
);
}
}
this._x = this._y = null;
this._basis.lineEnd();
},
point: function(x, y) {
this._x.push(+x);
this._y.push(+y);
}
};
export default (function custom(beta) {
function bundle(context) {
return beta === 1 ? new Basis(context) : new Bundle(context, beta);
}
bundle.beta = function(beta) {
return custom(+beta);
};
return bundle;
})(0.85);