# Are the new math fonts being made new characters, or adaptation of existing work to OTF?

I just watched UK-TUG 2012 - TeX Gyre Math report, and it wasn't clear to me if the characters of existing fonts are being adapted to the OTF formats, or if all-new glyphs are being created. For example, one of the fonts being worked on is Times, via TeX Gyre Termes (Nimbus Roman No9 L). Are the new math characters brand new, or they adapted from some other source, such as mathptmx (URW Nimbus Roman)?

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It's worth noting that existing bundles such as mathptmx are something of a mix of glyphs from different sources, some one which actually fit and some of which are 'better than nothing'. As such, the work being done by TeX Gyre (and other math mode projects) is substantial.