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// Copyright (C) 1999-2017
// Smithsonian Astrophysical Observatory, Cambridge, MA, USA
// For conditions of distribution and use, see copyright notice in "copyright"
#include "inversescale.h"
#include "framebase.h"
#include "colorscale.h"
InverseScale::InverseScale(int ss) : size_(ss)
{
level_ = new double[size_];
for (int ii=0; ii<size_; ii++)
level_[ii] = 0;
}
InverseScale::InverseScale(int ss, double* ll) : size_(ss)
{
level_ = new double[size_];
for (int ii=0; ii<size_; ii++)
level_[ii] = ll[ii];
}
InverseScale::~InverseScale()
{
if (level_)
delete [] level_;
}
ostream& operator<<(ostream& s, const InverseScale& c)
{
for (int ii=0; ii<c.size_; ii++)
if (isfinite(c.level_[ii]))
s << c.level_[ii] << ' ';
else
s << 0 << ' ';
return s;
}
// Note: this an inverse algorithm. We have y, we need x
LinearInverseScale::LinearInverseScale(int ss, double low, double high)
: InverseScale(ss)
{
if (size_==1) {
level_[0] = high;
return;
}
double dd = high-low;
for (int ii=0; ii<size_; ii++) {
double aa = double(ii)/(size_-1);
level_[ii] = aa*dd +low;
}
}
LogInverseScale::LogInverseScale(int ss, double low, double high, double exp)
: InverseScale(ss)
{
if (size_==1) {
level_[0] = high;
return;
}
double dd = high-low;
for (int ii=0; ii<size_; ii++) {
double aa = (::pow(exp,double(ii)/(size_-1)) -1) / exp;
level_[ii] = aa*dd +low;
}
}
PowInverseScale::PowInverseScale(int ss, double low, double high, double exp)
: InverseScale(ss)
{
if (size_==1) {
level_[0] = high;
return;
}
double dd = high-low;
for (int ii=0; ii<size_; ii++) {
double aa = log10(exp*double(ii)/(size_-1) +1) / log10(exp);
level_[ii] = aa*dd +low;
}
}
SqrtInverseScale::SqrtInverseScale(int ss, double low, double high)
: InverseScale(ss)
{
if (size_==1) {
level_[0] = high;
return;
}
double dd = high-low;
for (int ii=0; ii<size_; ii++) {
double aa = double(ii)/(size_-1);
level_[ii] = (aa*aa)*dd +low;
}
}
SquaredInverseScale::SquaredInverseScale(int ss, double low, double high)
: InverseScale(ss)
{
if (size_==1) {
level_[0] = high;
return;
}
double dd = high-low;
for (int ii=0; ii<size_; ii++) {
double aa = sqrt(double(ii)/(size_-1));
level_[ii] = aa*dd +low;
}
}
AsinhInverseScale::AsinhInverseScale(int ss, double low, double high)
: InverseScale(ss)
{
if (size_==1) {
level_[0] = high;
return;
}
double dd = high-low;
for (int ii=0; ii<size_; ii++) {
double aa = sinh(3*double(ii)/(size_-1))/10;
level_[ii] = aa*dd +low;
}
}
SinhInverseScale::SinhInverseScale(int ss, double low, double high)
: InverseScale(ss)
{
if (size_==1) {
level_[0] = high;
return;
}
double dd = high-low;
for (int ii=0; ii<size_; ii++) {
double aa = asinh(10*double(ii)/(size_-1))/3;
level_[ii] = aa*dd +low;
}
}
HistEquInverseScale::HistEquInverseScale(int ss, double low, double high,
double* hist, int histsize)
: InverseScale(ss)
{
if (size_==1) {
level_[0] = high;
return;
}
double dd = high-low;
if (!hist) {
for (int ii=0; ii<size_; ii++) {
double aa = double(ii)/(size_-1);
level_[ii] = aa*dd +low;
}
}
else {
for (int ii=0; ii<size_; ii++) {
double vv = double(ii)/(size_-1);
int jj=0;
while (jj<histsize-1) {
if (hist[jj]>vv)
break;
jj++;
}
double aa = double(jj)/histsize;
level_[ii] = aa*dd +low;
}
}
}
IISInverseScale::IISInverseScale(int ss, double low, double high, Vector& iisz)
: InverseScale(ss)
{
if (size_==1) {
level_[0] = high;
return;
}
double dd = high-low;
for (int ii=0; ii<size_; ii++) {
double aa = double(ii)/(size_-1);
double vv = aa*dd +low;
if (vv == 0)
level_[ii] = iisz[0];
else if (vv == IISMIN)
level_[ii] = iisz[0];
else if (vv == IISMAX)
level_[ii] = iisz[1];
else if (vv > IISMAX)
level_[ii] = iisz[1];
else
level_[ii] = ((vv-IISMIN) * (iisz[1]-iisz[0]))/(IISMAX-IISMIN) + iisz[0];
}
}
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