CODEWITHSUNDEEP
javascriptgoogle-chromewindows-8multi-touchfamo.us
Eric T
Eric T

Reputation: 946

Famo.us Maximum Touch Points (Windows 8 + Chrome)

I'm doing discovery on developing a multi-touch web app on an Ideum multitouch table which has capacity for 46 touch points.

I don't have direct access to the Ideum table yet, but was able to test a codepen that I adapted from another SO question on both a 5 point Windows 8 machine, as well as my Google Nexus 5 (got up to 10 points) using TouchSync:

var touchSync = new TouchSync({touchLimit: 46}, function () {
    return position;
});

When I had someone with physical access to the table attempt 10+ touch points, they were stopped at 10.

I'm wondering before I continue if Famo.us can support more than 10 touch events, or if this is just a browser limitation with Chrome on Windows 8.

Does anybody have any insights on Famo.us's limitations when it comes to number of touch points?

Upvotes: 1

Views: 285

Answers (1)

Joseph
Joseph

Reputation: 539

There is nothing that will specifically prevent one from using multiple touch points within a Famous application beyond the touchLimit of the TouchTracker. That said, I have not tried to develop an app that uses more than 2 touch points at a time.

Side Note: When you are developing, I would pay specific attention to the Famous appMode behavior. When testing the 10+ touch points, you may want to try setting:

Engine.setOptions({appMode: false});

This will prevent the following code from from executing:

function initialize() {
    // prevent scrolling via browser
    window.addEventListener('touchmove', function(event) {
        event.preventDefault();
    }, true);

    addRootClasses();
}

While I do not think this will have an impact, I will restate that I have not developed an app with more than 2 touch points and is something I would want to understand.

You may also want to check out: https://code.google.com/p/chromium/issues/detail?id=316085

Upvotes: 1

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