as it says in eiface.h:
Code:
float flFraction; // time completed, 1.0 = didn't hit anything
You can for example get the distance between the start point end the found point using Length(endPoint - startPoint) * flFraction (although its easier to do it using Length(foundPoint - startPoint) but it was meant to show you what flFraction is).
AFAIK, you can get the flFraction member of the TraceResult structure using:
Code:
new Float:flFraction;
traceresult(TR_Fraction, flFraction);
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