cdnjs.cloudflare.com delivering 1.1.0 instead of 1.2.1

[drlippman]

Certain functions aren't showing with a functiongraph.

Minimal reproduction example:

var board = JXG.JSXGraph.initBoard('jxgboard', {boundingbox: [-5,5,5,-5], axis:true});
var f = function(x) {  return 2*(x-3)*(x+1); }
var graph = board.create('functiongraph', [f]);

Expected behavior: a graph of the function
Actual behavior: a blank grid
No javascript errors are logged

The graph will appear if the function is changed to 2.1*(x-3)*(x+1), so it seems to be some specific characteristic of that function.

This issue does not exist in 0.99.7, but does starting in 1.0.0, and still exists in 1.2.1.

[alfredwassermann]

I can confirm this bug for 1.0.0 and 1.1.0, but not for 1.2.1 (and 1.2.0), see https://jsfiddle.net/oe01k4f6/
Can provide a jsfiddle example?
Best wishes,
Alfred

[drlippman]

See https://jsfiddle.net/dlippman/fq9n0kju/

Perhaps the cdnjs.cloudflare.com repo isn't loading the right version? Ahh, yeah, it appears it's delivering 1.1.0 instead of 1.2.1.

I'll edit the issue to reflect that. Thanks, and sorry for not catching that earlier.

[drgrice1]

I am still seeing this with some graphs with version 1.2.1 (not the incorrect version 1.1.0 from cloudflare).
Here is a minimal example:

var board = JXG.JSXGraph.initBoard('box', { boundingbox: [-8, 1600, 8, -1600] });
board.create('curve', [
	function(t) { return t; },
	function(t) { return Math.pow(t, 2) * (t + 5) * Math.pow(t - 5, 2); },
	-8, 8
]);

With that example no graph appears. If you remove the -8, 8 domain or change that to -7.95, 7.95 the graph appears, but there are messages in the console of the form "TODO _findStartPoint ..."

[alfredwassermann]

OK, you are right. Thanks for your patience.
I removed this part of _findStartPoint, because it is too unstable numerically.
It will be available in today's nightly build.
You also might experiment with the upcoming new plotting algorithm, plotVersion:4:

board.create('curve', [
  function(t) { return t; },
  function(t) { return Math.pow(t, 2) * (t + 5) * Math.pow(t - 5, 2); },
  -8, 8], 
  {plotVersion: 4});

Version 4 of the plot algorithm is not affected by this bug.
Best wishes, Alfred

[drgrice1]

I will look into the new plot algorithm.
Thanks.

[alfredwassermann]

Well, it still has its shortcomings. But it has a promising fresh approach.

[alfredwassermann]

The bug in the title is now fixed since 1.2.2. It was a bug in the update process.

[drgrice1]

Sounds good. Thanks.