[luatex] Unicode math issue with LuaLaTeX

[Taco Hoekwater]

Ulrik Vieth wrote:
> On 06/13/2010 01:55 AM, Ulrik Vieth wrote:
>>
>> Could it be that some of the TFM-based \Umathradical... parameters
>> from cmsy + cmex in \fam2 + \fam3 are retained instead of applying
>> the OpenType math parameters from XITSMath in \fam 4?
>>
>> Traditional \TeX always used to treat \fam2 + \fam3 as the source
>> of global \fontdimen parameters applicable to all font families.
>> Does this still hold for LuaTeX? Does it no longer apply for XeTeX?
>>
>> Could it be that unicode-math.sty is taking an inappropriate approach
>> by loading the new OpenType math font into a new family, instead of
>> replacing and overriding the default value in \fam2 + \fam3?
> 
> After a bit of thinking, I wonder if LuaTeX should reconsider its
> approach to handling OpenType math font parameters:
> 
> For example, if you load CambriaMath, AsanaMath and XITSMath into
> \fam 4, 5, 6, and each comes with its own set of OT math parameters, why 
> should any set of parameters from \fam 2 + \fam 3 apply globally?

Is there a $\fam=3 $ set up in lualatex?

Best wishes,
Taco