[luatex] Use Math Glyphs from Text Font

[Will Robertson]

On 2010-10-18 19:34:52 +1030, "C. Comren" 
<ccomren at gmail.com> said:
> 
> Now I just need a way to change the Greek alphabet.

Try this:

\makeatletter
\def\DeclareUnicodeMathSymbol#1#2#3#4{
  \global\luatexUmathchardef#1=
    "\mathchar at type#2
    "\the\csname sym#3\endcsname
    #4
}
\makeatother
\DeclareUnicodeMathSymbol{\alpha}{\mathalpha}{mysymfont}{"1D6FC}

(don't use it with literal input chars; only control sequences like 
\alpha are allowed)

I guess I should provide something like this in unicode-math, really. 
This was the original idea, actually, and then it ballooned out of 
control when I was young and naive.

W