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/*
xmunipack - tone profiles
Copyright © 2009-2011, 2018-21 F.Hroch (hroch@physics.muni.cz)
This file is part of Munipack.
Munipack is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Munipack is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Munipack. If not, see <http://www.gnu.org/licenses/>.
*/
#include "fits.h"
#include <cmath>
FitsItt::FitsItt(): itt(ITT_LINE),F(&FitsItt::itt_line) {}
FitsItt::FitsItt(int i) { SetItt(i); }
void FitsItt::SetItt(int i)
{
wxASSERT(ITT_FIRST < i && i < ITT_LAST);
itt = i;
switch(itt) {
case ITT_LINE: F = &FitsItt::itt_line; break;
case ITT_SNLIKE:F = &FitsItt::itt_snlike; break;
case ITT_ASINH: F = &FitsItt::itt_asinh; break;
case ITT_TANH: F = &FitsItt::itt_tanh; break;
case ITT_PHOTO: F = &FitsItt::itt_photo;break;
case ITT_SQR: F = &FitsItt::itt_sqr; break;
}
}
void FitsItt::SetItt(const wxString& a)
{
for(int i = ITT_FIRST+1; i < ITT_LAST; i++)
if( a == Type_str(i) ) {
SetItt(i);
return;
}
wxFAIL_MSG("*** FitsItt::SetItt(const wxString&): unreachable line reached.");
}
int FitsItt::GetItt() const
{
return itt;
}
wxString FitsItt::GetItt_str() const
{
return Type_str(itt);
}
bool FitsItt::IsLinear() const
{
return itt == ITT_LINE;
}
wxString FitsItt::Type_str(int n)
{
switch(n){
case ITT_LINE: return "Linear";
case ITT_SNLIKE:return "S/N like";
case ITT_SQR: return "Square";
case ITT_ASINH: return "asinh";
case ITT_TANH: return "tanh";
case ITT_PHOTO: return "Photo";
default: return "";
}
}
wxArrayString FitsItt::Type_str()
{
wxArrayString a;
for(int i = ITT_FIRST+1; i < ITT_LAST; i++)
a.Add(Type_str(i));
return a;
}
float FitsItt::itt_line(float x) const
{
return x;
}
float FitsItt::itt_snlike(float x) const
{
float t = 6.66f*x;
return t > 0.0f ? t / asinh(t) - 1.0f : 0.0f;
}
float FitsItt::itt_sqr(float x) const
{
return x*x;
}
float FitsItt::itt_tanh(float x) const
{
return tanh(x);
}
float FitsItt::itt_asinh(float x) const
{
return asinh(x);
}
float FitsItt::itt_photo(float x) const
{
return (1.0f + tanh(2.0f*(x - 1.0f)))/2.0f;
}
float *FitsItt::Scale(long n, const float *a) const
{
float *f = new float[n];
for(long i = 0; i < n; i++)
f[i] = Scale(a[i]);
return f;
}
float FitsItt::InvScale(float f) const
{
wxASSERT(ITT_FIRST < itt && itt < ITT_LAST);
if( itt == ITT_LINE )
return f;
else if( itt == ITT_SNLIKE )
return (f - 1.0)/f;
else if( itt == ITT_SQR )
return f > 0.0 ? sqrt(f) : 0.0;
else if( itt == ITT_TANH )
return fabs(f) < 1.0 ? atanh(f) : copysign(1.0,f);
else if( itt == ITT_ASINH )
return sinh(f);
else if( itt == ITT_PHOTO ) {
if( f < 0.0 )
return 0.0;
else if( f > 1.0 )
return 1.0;
else
return 1.0 + atanh(2.0*f-1.0) / 2.0;
}
return 1.0;
}
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