Rotate stop working

[fedebotto]

Hi Dirk, i was testing the traqball, and for some reason, the box with no JS error, stops rotating. This error it is fired at a random moment, sometimes at the number 10 (drag or click) and sometimes at number 400.

What i have detected is that the startMatrix variable in the rotate event returns Nan for the first 14 positions.

My "solution", is for now, at the event rotate, if the startMatrix has Nan, calculate it again.
This line is added before the THIS.box.style[cssPref+"Transform"]......

if (isNaN(startMatrix[0]) || isNaN(startMatrix[1]) || isNaN(startMatrix[2]) || .....) {
startMatrix = calcMatrix(axis, angle);
}

This solves the rotation but, the box jumps to that position.
I'm pasting a console screenshot that may help you.

Let me know if i can help you.

[dirkweber]

Hi Fedebotto, did this error appear in the demo or in a new file (would be great to get a link)? Which browser did you use? On a touch or a mouse device?

[maximedaoust]

Hi @dirkweber and @fedebotto, I actually have the same problem. It also appear in the demo. I am on pc chrome latest (Version 39.0.2171.71 m) with a mouse.

[fedebotto]

Hi @maximedaoust you could use my 'solution', i'm using it in my works right now, or you could come with a better one! in that case share it.