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Curve.cpp
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/* ***** BEGIN LICENSE BLOCK *****
* This file is part of Natron <https://natrongithub.github.io/>,
* (C) 2018-2021 The Natron developers
* (C) 2013-2018 INRIA and Alexandre Gauthier-Foichat
*
* Natron 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 2 of the License, or
* (at your option) any later version.
*
* Natron 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 Natron. If not, see <http://www.gnu.org/licenses/gpl-2.0.html>
* ***** END LICENSE BLOCK ***** */
// ***** BEGIN PYTHON BLOCK *****
// from <https://docs.python.org/3/c-api/intro.html#include-files>:
// "Since Python may define some pre-processor definitions which affect the standard headers on some systems, you must include Python.h before any standard headers are included."
#include <Python.h>
// ***** END PYTHON BLOCK *****
#include "Curve.h"
#include <algorithm>
#include <cassert>
#include <stdexcept>
#if !defined(SBK_RUN) && !defined(Q_MOC_RUN)
GCC_DIAG_UNUSED_LOCAL_TYPEDEFS_OFF
#include <boost/math/special_functions/fpclassify.hpp>
GCC_DIAG_UNUSED_LOCAL_TYPEDEFS_ON
#endif
#include "Engine/AppManager.h"
#include "Engine/CurvePrivate.h"
#include "Engine/Interpolation.h"
#include "Engine/KnobTypes.h"
#include "Engine/KnobFile.h"
#include "Engine/Smooth1D.h"
NATRON_NAMESPACE_ENTER
NATRON_NAMESPACE_ANONYMOUS_ENTER
struct KeyFrameCloner
{
KeyFrame operator()(const KeyFrame & kf) const
{
return KeyFrame(kf);
}
};
class KeyFrameTimePredicate
{
public:
KeyFrameTimePredicate(double t)
: _t(t)
{
};
bool operator()(const KeyFrame & f)
{
return f.getTime() == _t;
}
private:
double _t;
};
NATRON_NAMESPACE_ANONYMOUS_EXIT
/************************************KEYFRAME************************************/
KeyFrame::KeyFrame()
: _time(0.)
, _value(0.)
, _leftDerivative(0.)
, _rightDerivative(0.)
, _interpolation(eKeyframeTypeSmooth)
{
}
KeyFrame::KeyFrame(double time,
double initialValue,
double leftDerivative,
double rightDerivative,
KeyframeTypeEnum interpolation)
: _time(time)
, _value(initialValue)
, _leftDerivative(leftDerivative)
, _rightDerivative(rightDerivative)
, _interpolation(interpolation)
{
assert( !(boost::math::isnan)(_time) && !(boost::math::isinf)(_time) );
assert( !(boost::math::isnan)(_value) && !(boost::math::isinf)(_value) );
assert( !(boost::math::isnan)(_leftDerivative) && !(boost::math::isinf)(_leftDerivative) );
assert( !(boost::math::isnan)(_rightDerivative) && !(boost::math::isinf)(_rightDerivative) );
}
KeyFrame::KeyFrame(const KeyFrame & other)
: _time(other._time)
, _value(other._value)
, _leftDerivative(other._leftDerivative)
, _rightDerivative(other._rightDerivative)
, _interpolation(other._interpolation)
{
assert( !(boost::math::isnan)(_time) && !(boost::math::isinf)(_time) );
assert( !(boost::math::isnan)(_value) && !(boost::math::isinf)(_value) );
assert( !(boost::math::isnan)(_leftDerivative) && !(boost::math::isinf)(_leftDerivative) );
assert( !(boost::math::isnan)(_rightDerivative) && !(boost::math::isinf)(_rightDerivative) );
}
void
KeyFrame::operator=(const KeyFrame & o)
{
_time = o._time;
_value = o._value;
_leftDerivative = o._leftDerivative;
_rightDerivative = o._rightDerivative;
_interpolation = o._interpolation;
assert( !(boost::math::isnan)(_time) && !(boost::math::isinf)(_time) );
assert( !(boost::math::isnan)(_value) && !(boost::math::isinf)(_value) );
assert( !(boost::math::isnan)(_leftDerivative) && !(boost::math::isinf)(_leftDerivative) );
assert( !(boost::math::isnan)(_rightDerivative) && !(boost::math::isinf)(_rightDerivative) );
}
KeyFrame::~KeyFrame()
{
}
void
KeyFrame::setLeftDerivative(double leftDerivative)
{
_leftDerivative = leftDerivative;
assert( !(boost::math::isnan)(_leftDerivative) && !(boost::math::isinf)(_leftDerivative) );
}
void
KeyFrame::setRightDerivative(double rightDerivative)
{
_rightDerivative = rightDerivative;
assert( !(boost::math::isnan)(_rightDerivative) && !(boost::math::isinf)(_rightDerivative) );
}
void
KeyFrame::setValue(double value)
{
_value = value;
assert( !(boost::math::isnan)(_value) && !(boost::math::isinf)(_value) );
}
void
KeyFrame::setTime(double time)
{
_time = time;
assert( !(boost::math::isnan)(_time) && !(boost::math::isinf)(_time) );
}
void
KeyFrame::setInterpolation(KeyframeTypeEnum interp)
{
_interpolation = interp;
}
KeyframeTypeEnum
KeyFrame::getInterpolation() const
{
return _interpolation;
}
double
KeyFrame::getValue() const
{
return _value;
}
double
KeyFrame::getTime() const
{
return _time;
}
double
KeyFrame::getLeftDerivative() const
{
return _leftDerivative;
}
double
KeyFrame::getRightDerivative() const
{
return _rightDerivative;
}
/************************************CURVEPATH************************************/
Curve::Curve()
: _imp(new CurvePrivate)
{
}
Curve::Curve(KnobI *owner,
int dimensionInOwner)
: _imp(new CurvePrivate)
{
assert(owner);
_imp->owner = owner;
_imp->dimensionInOwner = dimensionInOwner;
//std::string typeName = _imp->owner->typeName(); // crashes because the Knob constructor is not finished at this point
bool found = false;
// use RTTI to guess curve type
if (!found) {
KnobDouble* k = dynamic_cast<KnobDouble*>(owner);
if (k) {
_imp->type = CurvePrivate::eCurveTypeDouble;
found = true;
}
}
if (!found) {
KnobColor* k = dynamic_cast<KnobColor*>(owner);
if (k) {
_imp->type = CurvePrivate::eCurveTypeDouble;
found = true;
}
}
if (!found) {
KnobInt* k = dynamic_cast<KnobInt*>(owner);
if (k) {
_imp->type = CurvePrivate::eCurveTypeInt;
found = true;
}
}
if (!found) {
KnobChoice* k = dynamic_cast<KnobChoice*>(owner);
if (k) {
_imp->type = CurvePrivate::eCurveTypeIntConstantInterp;
found = true;
}
}
if (!found) {
KnobString* k = dynamic_cast<KnobString*>(owner);
if (k) {
_imp->type = CurvePrivate::eCurveTypeString;
found = true;
}
}
if (!found) {
KnobFile* k = dynamic_cast<KnobFile*>(owner);
if (k) {
_imp->type = CurvePrivate::eCurveTypeString;
found = true;
}
}
if (!found) {
KnobOutputFile* k = dynamic_cast<KnobOutputFile*>(owner);
if (k) {
_imp->type = CurvePrivate::eCurveTypeString;
found = true;
}
}
if (!found) {
KnobPath* k = dynamic_cast<KnobPath*>(owner);
if (k) {
_imp->type = CurvePrivate::eCurveTypeString;
found = true;
}
}
if (!found) {
KnobBool* k = dynamic_cast<KnobBool*>(owner);
if (k) {
_imp->type = CurvePrivate::eCurveTypeBool;
found = true;
}
}
if (!found) {
KnobParametric* parametric = dynamic_cast<KnobParametric*>(owner);
if (parametric) {
_imp->isParametric = true;
found = true;
}
}
assert(found);
}
Curve::Curve(const Curve & other)
: _imp( new CurvePrivate(*other._imp) )
{
}
Curve::~Curve()
{
clearKeyFrames();
}
void
Curve::setPeriodic(bool periodic)
{
QMutexLocker k(&_imp->_lock);
_imp->isPeriodic = periodic;
_imp->keyFrames.clear();
}
bool
Curve::isCurvePeriodic() const
{
return _imp->isPeriodic;
}
void
Curve::operator=(const Curve & other)
{
*_imp = *other._imp;
}
void
Curve::clearKeyFrames()
{
QMutexLocker l(&_imp->_lock);
_imp->keyFrames.clear();
}
bool
Curve::areKeyFramesTimeClampedToIntegers() const
{
QMutexLocker l(&_imp->_lock);
return !_imp->isParametric;
}
void
Curve::clone(const Curve & other)
{
KeyFrameSet otherKeys = other.getKeyFrames_mt_safe();
QMutexLocker l(&_imp->_lock);
_imp->keyFrames.clear();
std::transform( otherKeys.begin(), otherKeys.end(), std::inserter( _imp->keyFrames, _imp->keyFrames.begin() ), KeyFrameCloner() );
onCurveChanged();
}
bool
Curve::cloneAndCheckIfChanged(const Curve& other)
{
KeyFrameSet otherKeys = other.getKeyFrames_mt_safe();
QMutexLocker l(&_imp->_lock);
bool hasChanged = false;
if ( otherKeys.size() != _imp->keyFrames.size() ) {
hasChanged = true;
}
if (!hasChanged) {
assert( otherKeys.size() == _imp->keyFrames.size() );
KeyFrameSet::iterator oit = otherKeys.begin();
for (KeyFrameSet::iterator it = _imp->keyFrames.begin(); it != _imp->keyFrames.end(); ++it, ++oit) {
if (*it != *oit) {
hasChanged = true;
break;
}
}
}
if (hasChanged) {
_imp->keyFrames.clear();
std::transform( otherKeys.begin(), otherKeys.end(), std::inserter( _imp->keyFrames, _imp->keyFrames.begin() ), KeyFrameCloner() );
onCurveChanged();
}
return hasChanged;
}
void
Curve::clone(const Curve & other,
SequenceTime offset,
const RangeD* range)
{
KeyFrameSet otherKeys = other.getKeyFrames_mt_safe();
// The range=[0,0] case is obviously a bug in the spec of paramCopy() from the parameter suite:
// it prevents copying the value of frame 0.
bool copyRange = range != NULL /*&& (range->min != 0 || range->max != 0)*/;
QMutexLocker l(&_imp->_lock);
_imp->keyFrames.clear();
for (KeyFrameSet::iterator it = otherKeys.begin(); it != otherKeys.end(); ++it) {
double time = it->getTime();
if ( copyRange && ( (time < range->min) || (time > range->max) ) ) {
continue;
}
KeyFrame k(*it);
if (offset != 0) {
k.setTime(time + offset);
}
_imp->keyFrames.insert(k);
}
onCurveChanged();
}
double
Curve::getMinimumTimeCovered() const
{
QMutexLocker l(&_imp->_lock);
assert( !_imp->keyFrames.empty() );
return ( *_imp->keyFrames.begin() ).getTime();
}
double
Curve::getMaximumTimeCovered() const
{
QMutexLocker l(&_imp->_lock);
assert( !_imp->keyFrames.empty() );
return ( *_imp->keyFrames.rbegin() ).getTime();
}
bool
Curve::addKeyFrame(KeyFrame key)
{
QMutexLocker l(&_imp->_lock);
// the default interpolation for bool, string, chaice, int is constant
if ( (_imp->type == CurvePrivate::eCurveTypeBool) || (_imp->type == CurvePrivate::eCurveTypeString) ||
( _imp->type == CurvePrivate::eCurveTypeInt) ||
( _imp->type == CurvePrivate::eCurveTypeIntConstantInterp) ) {
key.setInterpolation(eKeyframeTypeConstant);
}
std::pair<KeyFrameSet::iterator, bool> it = addKeyFrameNoUpdate(key);
it.first = evaluateCurveChanged(eCurveChangedReasonKeyframeChanged, it.first);
l.unlock();
return it.second;
}
std::pair<KeyFrameSet::iterator, bool> Curve::addKeyFrameNoUpdate(const KeyFrame & cp)
{
// PRIVATE - should not lock
if (!_imp->isParametric) { //< if keyframes are clamped to integers
std::pair<KeyFrameSet::iterator, bool> newKey = _imp->keyFrames.insert(cp);
// keyframe at this time exists, erase and insert again
bool addedKey = true;
if (!newKey.second) {
_imp->keyFrames.erase(newKey.first);
newKey = _imp->keyFrames.insert(cp);
assert(newKey.second);
addedKey = false;
}
return std::make_pair(newKey.first, addedKey);
} else {
bool addedKey = true;
double paramEps = NATRON_CURVE_X_SPACING_EPSILON;
for (KeyFrameSet::iterator it = _imp->keyFrames.begin(); it != _imp->keyFrames.end(); ++it) {
if (std::abs( it->getTime() - cp.getTime() ) < paramEps) {
_imp->keyFrames.erase(it);
addedKey = false;
break;
}
}
std::pair<KeyFrameSet::iterator, bool> newKey = _imp->keyFrames.insert(cp);
newKey.second = addedKey;
return newKey;
}
}
void
Curve::removeKeyFrame(KeyFrameSet::const_iterator it)
{
// PRIVATE - should not lock
KeyFrame prevKey;
bool mustRefreshPrev = false;
KeyFrame nextKey;
bool mustRefreshNext = false;
KeyFrameSet::iterator next = it;
if ( next != _imp->keyFrames.end() ) {
++next;
}
// If the curve is periodic, it has a keyframe before if it is no
if ( it != _imp->keyFrames.begin() || (_imp->isPeriodic && _imp->keyFrames.size() > 2)) {
bool prevKeySet = false;
if (it != _imp->keyFrames.begin()) {
KeyFrameSet::iterator prev = it;
if ( prev != _imp->keyFrames.begin() ) {
--prev;
}
if ( prev != _imp->keyFrames.end() ) {
prevKey = *prev;
prevKeySet = true;
}
} else {
KeyFrameSet::reverse_iterator end = _imp->keyFrames.rbegin();
++end;
if ( end != _imp->keyFrames.rend() ) {
prevKey = *end;
prevKeySet = true;
}
}
mustRefreshPrev = (prevKeySet &&
prevKey.getInterpolation() != eKeyframeTypeBroken &&
prevKey.getInterpolation() != eKeyframeTypeFree &&
prevKey.getInterpolation() != eKeyframeTypeNone);
}
if ( next != _imp->keyFrames.end() || (_imp->isPeriodic && _imp->keyFrames.size() > 2)) {
bool nextKeySet = false;
if (next != _imp->keyFrames.end()) {
nextKey = *next;
nextKeySet = true;
} else {
KeyFrameSet::iterator start = _imp->keyFrames.begin();
++start;
if ( start != _imp->keyFrames.end() ) {
nextKey = *start;
nextKeySet = true;
}
}
mustRefreshNext = (nextKeySet &&
nextKey.getInterpolation() != eKeyframeTypeBroken &&
nextKey.getInterpolation() != eKeyframeTypeFree &&
nextKey.getInterpolation() != eKeyframeTypeNone);
}
_imp->keyFrames.erase(it);
if (mustRefreshPrev) {
refreshDerivatives( eCurveChangedReasonDerivativesChanged, find( prevKey.getTime() ) );
}
if (mustRefreshNext) {
refreshDerivatives( eCurveChangedReasonDerivativesChanged, find( nextKey.getTime() ) );
}
onCurveChanged();
}
void
Curve::removeKeyFrameWithIndex(int index)
{
if (index == -1) {
return;
}
QMutexLocker l(&_imp->_lock);
removeKeyFrame( atIndex(index) );
}
void
Curve::removeKeyFrameWithTime(double time)
{
QMutexLocker l(&_imp->_lock);
KeyFrameSet::iterator it = find(time);
if ( it == _imp->keyFrames.end() ) {
throw std::out_of_range("Curve::removeKeyFrameWithTime: non-existent keyframe");
}
removeKeyFrame(it);
}
void
Curve::removeKeyFramesBeforeTime(double time,
std::list<int>* keyframeRemoved)
{
KeyFrameSet newSet;
QMutexLocker l(&_imp->_lock);
for (KeyFrameSet::iterator it = _imp->keyFrames.begin(); it != _imp->keyFrames.end(); ++it) {
if (it->getTime() < time) {
keyframeRemoved->push_back( it->getTime() );
continue;
}
newSet.insert(*it);
}
_imp->keyFrames = newSet;
if ( !_imp->keyFrames.empty() ) {
refreshDerivatives( Curve::eCurveChangedReasonKeyframeChanged, _imp->keyFrames.begin() );
}
onCurveChanged();
}
void
Curve::removeKeyFramesAfterTime(double time,
std::list<int>* keyframeRemoved)
{
KeyFrameSet newSet;
QMutexLocker l(&_imp->_lock);
for (KeyFrameSet::iterator it = _imp->keyFrames.begin(); it != _imp->keyFrames.end(); ++it) {
if (it->getTime() > time) {
keyframeRemoved->push_back( it->getTime() );
continue;
}
newSet.insert(*it);
}
_imp->keyFrames = newSet;
if ( !_imp->keyFrames.empty() ) {
KeyFrameSet::iterator last = _imp->keyFrames.end();
--last;
refreshDerivatives(Curve::eCurveChangedReasonKeyframeChanged, last);
}
onCurveChanged();
}
bool
Curve::getKeyFrameWithIndex(int index,
KeyFrame* k) const
{
assert(k);
QMutexLocker l(&_imp->_lock);
if ( (index < 0) || ( (int)_imp->keyFrames.size() <= index ) ) {
return false;
}
*k = *atIndex(index);
return true;
}
bool
Curve::getNearestKeyFrameWithTime(double time,
KeyFrame* k) const
{
assert(k);
QMutexLocker l(&_imp->_lock);
if ( _imp->keyFrames.empty() ) {
return false;
}
if (_imp->keyFrames.size() == 1) {
*k = *_imp->keyFrames.begin();
return true;
}
KeyFrame kt(time, 0.); // virtual keyframe at t for comparison
KeyFrameSet::const_iterator lower = _imp->keyFrames.lower_bound(kt);
if ( lower == _imp->keyFrames.end() ) {
// all elements are before, take the last one
*k = *_imp->keyFrames.rbegin();
return true;
}
if (lower->getTime() >= time) {
// we are before the first element, return it
*k = *lower;
return true;
}
KeyFrameSet::const_iterator upper = _imp->keyFrames.upper_bound(kt);
if ( upper == _imp->keyFrames.end() ) {
// no element after this one, return the lower bound
*k = *lower;
return true;
}
// upper and lower are both valid iterators, take the closest one
assert(time - lower->getTime() > 0);
assert(upper->getTime() - time > 0);
if ( (upper->getTime() - time) < ( time - lower->getTime() ) ) {
*k = *upper;
} else {
*k = *lower;
}
return true;
}
bool
Curve::getPreviousKeyframeTime(double time,
KeyFrame* k) const
{
assert(k);
QMutexLocker l(&_imp->_lock);
if ( _imp->keyFrames.empty() ) {
return false;
}
KeyFrameSet::const_iterator upper = _imp->keyFrames.end();
for (KeyFrameSet::const_iterator it = _imp->keyFrames.begin(); it != _imp->keyFrames.end(); ++it) {
if (it->getTime() > time) {
upper = it;
break;
} else if (it->getTime() == time) {
if ( it == _imp->keyFrames.begin() ) {
return false;
} else {
--it;
*k = *it;
return true;
}
}
}
if ( upper == _imp->keyFrames.end() ) {
*k = *_imp->keyFrames.rbegin();
return true;
} else if ( upper == _imp->keyFrames.begin() ) {
return false;
} else {
///If we reach here the previous keyframe is exactly the previous to upper because we already checked
///in the for loop that the previous key wasn't equal to the given time
--upper;
assert(upper->getTime() < time);
*k = *upper;
return true;
}
}
bool
Curve::getNextKeyframeTime(double time,
KeyFrame* k) const
{
assert(k);
QMutexLocker l(&_imp->_lock);
if ( _imp->keyFrames.empty() ) {
return false;
}
KeyFrameSet::const_iterator upper = _imp->keyFrames.end();
for (KeyFrameSet::const_iterator it = _imp->keyFrames.begin(); it != _imp->keyFrames.end(); ++it) {
if (it->getTime() > time) {
upper = it;
break;
}
}
if ( upper == _imp->keyFrames.end() ) {
return false;
} else {
*k = *upper;
return true;
}
}
int
Curve::getNKeyFramesInRange(double first,
double last) const
{
int ret = 0;
QMutexLocker k(&_imp->_lock);
KeyFrameSet::const_iterator upper = _imp->keyFrames.end();
for (KeyFrameSet::const_iterator it = _imp->keyFrames.begin(); it != _imp->keyFrames.end(); ++it) {
if (it->getTime() >= first) {
upper = it;
break;
}
}
for (; upper != _imp->keyFrames.end(); ++upper) {
if (upper->getTime() >= last) {
break;
}
++ret;
}
return ret;
}
bool
Curve::getKeyFrameWithTime(double time,
KeyFrame* k) const
{
assert(k);
QMutexLocker l(&_imp->_lock);
KeyFrameSet::const_iterator it = find(time);
if ( it == _imp->keyFrames.end() ) {
return false;
}
*k = *it;
return true;
}
/// compute interpolation parameters from keyframes and an iterator
/// to the next keyframe (the first with time > t)
static void
interParams(const KeyFrameSet &keyFrames,
bool isPeriodic,
double xMin,
double xMax,
double *t,
KeyFrameSet::const_iterator itup,
double *tcur,
double *vcur,
double *vcurDerivRight,
KeyframeTypeEnum *interp,
double *tnext,
double *vnext,
double *vnextDerivLeft,
KeyframeTypeEnum *interpNext)
{
assert(keyFrames.size() >= 1);
assert( itup == keyFrames.end() || *t < itup->getTime() );
double period = xMax - xMin;
if (isPeriodic) {
// if the curve is periodic, bring back t in the curve keyframes range
double minKeyFrameX = keyFrames.begin()->getTime() + xMin;
assert(xMin < xMax);
if (*t < minKeyFrameX || *t > minKeyFrameX + period) {
// This will bring t either in minTime <= t <= maxTime or t in the range minTime - (maxTime - minTime) < t < minTime
*t = std::fmod(*t - minKeyFrameX, period ) + minKeyFrameX;
if (*t < minKeyFrameX) {
*t += period;
}
assert(*t >= minKeyFrameX && *t <= minKeyFrameX + period);
}
itup = keyFrames.upper_bound(KeyFrame(*t, 0.));
}
if ( itup == keyFrames.begin() ) {
// We are in the case where all keys have a greater time
// If periodic, we are in between xMin and the first keyframe
if (isPeriodic) {
*tnext = itup->getTime();
*vnext = itup->getValue();
*vnextDerivLeft = itup->getLeftDerivative();
*interpNext = itup->getInterpolation();
KeyFrameSet::const_reverse_iterator last = keyFrames.rbegin();
*tcur = last->getTime() - period;
*vcur = last->getValue();
*vcurDerivRight = last->getRightDerivative();
*interp = last->getInterpolation();
} else {
*tnext = itup->getTime();
*vnext = itup->getValue();
*vnextDerivLeft = itup->getLeftDerivative();
*interpNext = itup->getInterpolation();
*tcur = *tnext - 1.;
*vcur = *vnext;
*vcurDerivRight = 0.;
*interp = eKeyframeTypeNone;
}
} else if ( itup == keyFrames.end() ) {
// We are in the case where no key has a greater time
// If periodic, we are in-between the last keyframe and xMax
if (isPeriodic) {
KeyFrameSet::const_iterator next = keyFrames.begin();
KeyFrameSet::const_reverse_iterator prev = keyFrames.rbegin();
*tcur = prev->getTime();
*vcur = prev->getValue();
*vcurDerivRight = prev->getRightDerivative();
*interp = prev->getInterpolation();
*tnext = next->getTime() + period;
*vnext = next->getValue();
*vnextDerivLeft = next->getLeftDerivative();
*interpNext = next->getInterpolation();
} else {
KeyFrameSet::const_reverse_iterator itlast = keyFrames.rbegin();
*tcur = itlast->getTime();
*vcur = itlast->getValue();
*vcurDerivRight = itlast->getRightDerivative();
*interp = itlast->getInterpolation();
*tnext = *tcur + 1.;
*vnext = *vcur;
*vnextDerivLeft = 0.;
*interpNext = eKeyframeTypeNone;
}
} else {
// between two keyframes
// get the last keyframe with time <= t
KeyFrameSet::const_iterator itcur = itup;
--itcur;
assert(itcur->getTime() <= *t);
*tcur = itcur->getTime();
*vcur = itcur->getValue();
*vcurDerivRight = itcur->getRightDerivative();
*interp = itcur->getInterpolation();
*tnext = itup->getTime();
*vnext = itup->getValue();
*vnextDerivLeft = itup->getLeftDerivative();
*interpNext = itup->getInterpolation();
}
}
double
Curve::getValueAt(double t,
bool doClamp) const
{
QMutexLocker l(&_imp->_lock);
if ( _imp->keyFrames.empty() ) {
//throw std::runtime_error("Curve has no control points!");
// A curve with no control points is considered to be 0
// this is to avoid returning StatFailed when KnobParametric::getValue() is called on a parametric curve without control point.
return 0.;
// There is no special case for a curve with one (1) keyframe: the result is a linear curve before and after the keyframe.
//} else if (_imp->keyFrames.size() == 1) {
// return _imp->keyFrames.begin()->getValue();
}
double v;
#ifdef NATRON_CURVE_USE_CACHE
std::map<double, double>::const_iterator foundCached = _imp->resultCache.find(t);
if ( foundCached != _imp->resultCache.end() ) {
v = foundCached->second;
} else
#endif
{
// even when there is only one keyframe, there may be tangents!
//if (_imp->keyFrames.size() == 1) {
// //if there's only 1 keyframe, don't bother interpolating
// return (*_imp->keyFrames.begin()).getValue();
//}
double tcur, tnext;
double vcurDerivRight, vnextDerivLeft, vcur, vnext;
KeyframeTypeEnum interp, interpNext;
KeyFrame k(t, 0.);
// find the first keyframe with time greater than t
KeyFrameSet::const_iterator itup;
itup = _imp->keyFrames.upper_bound(k);
interParams(_imp->keyFrames,
_imp->isPeriodic,
_imp->xMin,
_imp->xMax,
&t,
itup,
&tcur,
&vcur,
&vcurDerivRight,
&interp,
&tnext,
&vnext,
&vnextDerivLeft,
&interpNext);
v = Interpolation::interpolate(tcur, vcur,
vcurDerivRight,
vnextDerivLeft,
tnext, vnext,
t,
interp,
interpNext);
#ifdef NATRON_CURVE_USE_CACHE
_imp->resultCache[t] = v;
#endif
}
if ( doClamp && mustClamp() ) {
v = clampValueToCurveYRange(v);
}
switch (_imp->type) {
case CurvePrivate::eCurveTypeString:
case CurvePrivate::eCurveTypeInt:
return std::floor(v + 0.5);
case CurvePrivate::eCurveTypeDouble:
return v;
case CurvePrivate::eCurveTypeBool:
return v >= 0.5 ? 1. : 0.;
default:
return v;
}
} // getValueAt
double
Curve::getDerivativeAt(double t) const
{
QMutexLocker l(&_imp->_lock);
if ( _imp->keyFrames.empty() ) {
throw std::runtime_error("Curve has no control points!");
}
assert(_imp->type == CurvePrivate::eCurveTypeDouble); // only real-valued curves can be derived
// even when there is only one keyframe, there may be tangents!
//if (_imp->keyFrames.size() == 1) {
// //if there's only 1 keyframe, don't bother interpolating
// return (*_imp->keyFrames.begin()).getValue();
//}
double tcur, tnext;
double vcurDerivRight, vnextDerivLeft, vcur, vnext;
KeyframeTypeEnum interp, interpNext;
KeyFrame k(t, 0.);
// find the first keyframe with time greater than t
KeyFrameSet::const_iterator itup;
itup = _imp->keyFrames.upper_bound(k);
interParams(_imp->keyFrames,