RFR: 8217472: Add attenuation for PointLight

[Kevin Rushforth]

On Wed, 15 Jul 2020 00:16:03 GMT, Nir Lisker <nlisker at openjdk.org> wrote:

>>> I've added sphere with 10, 64 (default) and 200 divisions.
>> 
>> Thanks, I'll take a look at it.
>
> Using AMD RX 470 4GB on Ubuntu 18, all 3 spheres averaged 60 fps both before and after the patch.
> 
> I wonder why the number is half what it is on Windows. Is it capped?

Yes, in general frame rate should be limited to the refresh rate of the monitor, although it isn't in all cases. I
would not count on running faster than 60 fps.

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PR: https://git.openjdk.java.net/jfx/pull/43