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#include "projectionobserver.h"
#include <algorithm>
#include <cmath>
#include <QDebug>
#include "mp.h"
static const float EPSILON = 1e-6f;
static void aggregatedError(const arma::mat &distX, const arma::mat &distY, arma::vec &v)
{
double maxX = distX.max();
double maxY = distY.max();
#pragma omp parallel for shared(maxX, maxY, distX, distY, v)
for (arma::uword i = 0; i < v.n_elem; i++) {
v[i] = 0;
for (arma::uword j = 0; j < v.n_elem; j++) {
if (i == j) {
continue;
}
float diff = fabs(distY(i, j) / maxY - distX(i, j) / maxX);
if (diff < EPSILON) {
continue;
}
v[i] += diff;
}
}
}
ProjectionObserver::ProjectionObserver(const arma::mat &X,
const arma::uvec &cpIndices)
: m_type(OBSERVER_CURRENT)
, m_X(X)
, m_cpIndices(cpIndices)
, m_rpIndices(X.n_rows - cpIndices.n_elem)
{
m_distX = mp::dist(m_X);
m_values.set_size(m_X.n_rows);
arma::uvec indices(m_X.n_rows);
for (arma::uword i = 0; i < indices.n_elem; i++) {
indices[i] = i;
}
std::set_difference(indices.cbegin(), indices.cend(),
m_cpIndices.cbegin(), m_cpIndices.cend(),
m_rpIndices.begin());
}
bool ProjectionObserver::setType(int type)
{
if (m_type == type) {
return true;
}
if (type != OBSERVER_DIFF_PREVIOUS || m_prevValues.n_elem != 0) {
m_type = type;
return emitValuesChanged();
}
return false;
}
void ProjectionObserver::setMap(const arma::mat &Y)
{
// update previous map
if (m_Y.n_elem > 0) {
m_prevY = m_Y;
m_prevDistY = m_distY;
m_prevValues = m_values;
}
m_Y = Y;
m_distY = mp::dist(Y);
aggregatedError(m_distX, m_distY, m_values);
// method called for the first time; set original Y
if (m_origY.n_elem == 0) {
m_origY = m_Y;
m_origDistY = m_distY;
m_origValues = m_values;
}
emitValuesChanged();
}
bool ProjectionObserver::emitValuesChanged() const
{
switch (m_type) {
case OBSERVER_CURRENT:
emit cpValuesChanged(m_values(m_cpIndices));
emit rpValuesChanged(m_values(m_rpIndices));
emit valuesChanged(m_values);
return true;
case OBSERVER_DIFF_PREVIOUS:
if (m_prevValues.n_elem > 0) {
arma::vec diff = m_values - m_prevValues;
emit cpValuesChanged(diff(m_cpIndices));
emit rpValuesChanged(diff(m_rpIndices));
emit valuesChanged(diff);
return true;
}
return false;
case OBSERVER_DIFF_ORIGINAL:
if (m_origValues.n_elem > 0) {
arma::vec diff = m_values - m_origValues;
emit cpValuesChanged(diff(m_cpIndices));
emit rpValuesChanged(diff(m_rpIndices));
emit valuesChanged(diff);
return true;
}
return false;
default:
return false;
}
}
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