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/* Copyright (c) 2012, 2013 Stanisław Halik <sthalik@misaki.pl>
* Permission to use, copy, modify, and/or distribute this
* software for any purpose with or without fee is hereby granted,
* provided that the above copyright notice and this permission
* notice appear in all copies.
*/
#include <QMutexLocker>
#include <QCoreApplication>
#include <QPointF>
#include <QList>
#include "functionconfig.h"
#include <QtAlgorithms>
#include <QtAlgorithms>
#include <QSettings>
#include <cmath>
#include <QPixmap>
void FunctionConfig::setTrackingActive(bool blnActive)
{
activep = blnActive;
}
FunctionConfig::FunctionConfig() :
_mutex(QMutex::Recursive),
data(0),
activep(false),
max_x(0),
max_y(0)
{
}
float FunctionConfig::getValue(float x) {
QMutexLocker foo(&_mutex);
int x2 = (int) (std::min<float>(std::max<float>(x, -360), 360) * MEMOIZE_PRECISION);
float ret = getValueInternal(x2);
last_input_value.setX(x);
last_input_value.setY(ret);
return ret;
}
bool FunctionConfig::getLastPoint(QPointF& point ) {
QMutexLocker foo(&_mutex);
point = last_input_value;
return activep;
}
float FunctionConfig::getValueInternal(int x) {
float sign = x < 0 ? -1 : 1;
x = x < 0 ? -x : x;
float ret;
int sz = data.size();
if (sz == 0)
ret = 0;
else if (x < 0)
ret = 0;
else if (x < sz && x >= 0)
ret = data[x];
else
ret = data[sz - 1];
return ret * sign;
}
static __inline QPointF ensureInBounds(QList<QPointF> points, int i) {
int siz = points.size();
if (siz == 0 || i < 0)
return QPointF(0, 0);
if (siz > i)
return points[i];
return points[siz - 1];
}
static bool sortFn(const QPointF& one, const QPointF& two) {
return one.x() < two.x();
}
void FunctionConfig::reload() {
if (input.size())
qStableSort(input.begin(), input.end(), sortFn);
if (input.size()) {
data = std::vector<float>(MEMOIZE_PRECISION * input[input.size() - 1].x());
const int sz = data.size();
for (int i = 0; i < sz; i++)
data[i] = -1;
for (int k = 0; k < input[0].x() * MEMOIZE_PRECISION; k++) {
if (k < sz)
data[k] = input[0].y() * k / (input[0].x() * MEMOIZE_PRECISION);
}
for (int i = 0; i < sz; i++) {
QPointF p0 = ensureInBounds(input, i - 1);
QPointF p1 = ensureInBounds(input, i);
QPointF p2 = ensureInBounds(input, i + 1);
QPointF p3 = ensureInBounds(input, i + 2);
int end = std::min<int>(sz, p2.x() * MEMOIZE_PRECISION);
int start = p1.x() * MEMOIZE_PRECISION;
for (int j = start; j < end; j++) {
double t = (j - start) / (double) (end - start);
double t2 = t*t;
double t3 = t*t*t;
int x = .5 * ((2. * p1.x()) +
(-p0.x() + p2.x()) * t +
(2. * p0.x() - 5. * p1.x() + 4. * p2.x() - p3.x()) * t2 +
(-p0.x() + 3. * p1.x() - 3. * p2.x() + p3.x()) * t3)
* MEMOIZE_PRECISION;
float y = .5 * ((2. * p1.y()) +
(-p0.y() + p2.y()) * t +
(2. * p0.y() - 5. * p1.y() + 4. * p2.y() - p3.y()) * t2 +
(-p0.y() + 3. * p1.y() - 3. * p2.y() + p3.y()) * t3);
if (x >= 0 && x < sz)
data[x] = y;
}
}
float last = 0;
for (int i = 0; i < sz; i++)
{
if (data[i] <= 0)
data[i] = last;
last = data[i];
}
}
}
void FunctionConfig::removePoint(int i) {
QMutexLocker foo(&_mutex);
if (i >= 0 && i < input.size())
{
input.removeAt(i);
reload();
}
}
void FunctionConfig::addPoint(QPointF pt) {
QMutexLocker foo(&_mutex);
input.append(pt);
reload();
}
void FunctionConfig::movePoint(int idx, QPointF pt) {
QMutexLocker foo(&_mutex);
if (idx >= 0 && idx < input.size())
{
input[idx] = pt;
reload();
}
}
const QList<QPointF> FunctionConfig::getPoints() {
QMutexLocker foo(&_mutex);
// NB can't pass by reference
return input;
}
void FunctionConfig::loadSettings(QSettings& settings, const QString& title) {
QMutexLocker foo(&_mutex);
QPointF newPoint;
QList<QPointF> points;
settings.beginGroup(QString("Curves-%1").arg(title));
int max = settings.value("point-count", 0).toInt();
for (int i = 0; i < max; i++) {
newPoint = QPointF(settings.value(QString("point-%1-x").arg(i), 0).toFloat(),
settings.value(QString("point-%1-y").arg(i), 0).toFloat());
if (newPoint.x() > max_x) {
newPoint.setX(max_x);
}
if (newPoint.y() > max_y) {
newPoint.setY(max_y);
}
points.append(newPoint);
}
settings.endGroup();
input = points;
reload();
}
void FunctionConfig::saveSettings(QSettings& settings, const QString& title) {
QMutexLocker foo(&_mutex);
settings.beginGroup(QString("Curves-%1").arg(title));
int max = input.size();
settings.setValue("point-count", max);
for (int i = 0; i < max; i++) {
settings.setValue(QString("point-%1-x").arg(i), input[i].x());
settings.setValue(QString("point-%1-y").arg(i), input[i].y());
}
for (int i = max; true; i++)
{
QString x = QString("point-%1-x").arg(i);
if (!settings.contains(x))
break;
settings.remove(x);
settings.remove(QString("point-%1-y").arg(i));
}
settings.endGroup();
}
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