fix issue #3 "Cannot call method 'toFixed' of undefined" on 90deg rotated faces #5
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As mentioned here, the error "Cannot call method 'toFixed' of undefined" appears in some case when faces are rotated to 90deg.
To be honest, I don't know what was missing exactly, but it seemed that the problem was related to the CSSMatrix.
So I tried adding the full FirminCSSMatrix class code from here, and it solved the problem.
Photon.js without changes :
http://jsfiddle.net/JulianG/X7FZA/
Photon.js with full FirminCSSMatrix class :
http://jsfiddle.net/JulianG/yS8sF/