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Commit b1631dac authored by Christophe Geuzaine's avatar Christophe Geuzaine
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limit char in [-127,127]
parent c8d482d7
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// $Id: Numeric.cpp,v 1.34 2007-10-25 08:55:07 geuzaine Exp $
// $Id: Numeric.cpp,v 1.35 2007-10-25 19:54:06 geuzaine Exp $
//
// Copyright (C) 1997-2007 C. Geuzaine, J.-F. Remacle
//
......@@ -433,16 +433,20 @@ double triangle_area(double p0[3], double p1[3], double p2[3])
char float2char(float f)
{
// f is supposed to be normalized in [-1, 1]
f = (f > 1.) ? 1. : (f < -1.) ? -1. : f;
// char is in [-128, 127]
return (char)(-128 + (f + 1.) / 2. * 255);
// float normalized in [-1, 1], char in [-127, 127]
f *= 127.;
if(f > 127.) return 127;
else if(f < -127.) return -127;
else return (char)f;
}
float char2float(char c)
{
float f = c;
return -1. + 2. * (f + 128.) / 255.;
f /= 127.;
if(f > 1.) return 1.;
else if(f < -1) return -1.;
else return f;
}
double InterpolateIso(double *X, double *Y, double *Z,
......
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