Re: [fullscreen] Problems with mouse-edge scrolling and games

Also: At the moment we're using CSS cursors to give visual feedback on
in-game hover/action states which works pretty well and is a breeze to
implement.


On Sun, Feb 23, 2014 at 4:16 PM, Thibaut Despoulain
<thibaut@artillery.com>wrote:

> I've written a test for this here:
>> http://codeflow.org/issues/software-cursor.html
>>
>> My observation from testing on linux is that I can't distinguish latency
>> for the software cursor from the OS cursor (or not by much anyway) in
>> google chrome. In firefox however there's noticable lag. Mileage may vary
>> for other platforms.
>>
>
> This is true, but sadly your test runs on an empty animation frame. If
> your main thread is doing a lot of work already (barely hitting the 60fps
> mark, as it is the case for demanding games), the lag will be much more
> perceptible as you will most likely drop a frame every now and then.
>
> The reason the cursor is hidden when the pointer is locked is that some
>> OSes don't have the ability to report relative mouse movement correctly at
>> screen edges. This requires the cursors to constantly be reset to the
>> center of the screen, which obviously would look strange if the cursor was
>> visible.
>
>
> Would that prevent vendors from implementing a pointer "edge grabbing"?
> (preventing the cursor to exit the window but keeping the OS cursor as-is
> while inside of it)
>
>
>
> On Sun, Feb 23, 2014 at 7:30 AM, Florian Bösch <pyalot@gmail.com> wrote:
>
>> On Sun, Feb 23, 2014 at 4:18 PM, Brandon Jones <bajones@google.com>wrote:
>>
>>> - it's possible to theme the OS cursor using custom images with CSS.
>>> https://developer.mozilla.org/en-US/docs/Web/CSS/cursor/url
>>>
>> Although that doesn't absolve vendors from fixing the latency issue even
>> if native pointers where to be made available during pointerlock. The
>> reason is that cursors come in more flavors than an image. For example they
>> could come in some variety of 3D rendered representations useful for the
>> game in question.
>>
>>
>>> - The reason the cursor is hidden when the pointer is locked is that
>>> some OSes don't have the ability to report relative mouse movement
>>> correctly at screen edges. This requires the cursors to constantly be reset
>>> to the center of the screen, which obviously would look strange if the
>>> cursor was visible.
>>>
>> Isn't that only a concern if you want to capture the cursor, not when you
>> display the OS cursor?
>>
>>
>>> - You already mentioned some issues with synthetic mouse events, but
>>> unfortunately it's worse than you suspect. For example: sending a synthetic
>>> click event to a checkbox doesn't actually change it's checked state. (Not
>>> the last time I tried anyway) select controls also have a hard time with
>>> synthetic events, and there's a whole host of other sub rely broken things.
>>> :(
>>>
>> Is there a motivation not to make it work? Clickjacking?
>>
>
>