59 lines
1.3 KiB
C++
59 lines
1.3 KiB
C++
#include "track.h"
|
|
#include "../syncdata.h"
|
|
using namespace sync;
|
|
|
|
#include <cmath>
|
|
#include <cstddef>
|
|
|
|
float Track::getValue(float time) const
|
|
{
|
|
if (keyFrames.size() == 0) return 0.0f;
|
|
|
|
int currRow = int(floor(time));
|
|
|
|
// find bounding keyframes
|
|
KeyFrameContainer::const_iterator upper = keyFrames.upper_bound(currRow);
|
|
KeyFrameContainer::const_iterator lower = upper;
|
|
lower--;
|
|
|
|
// bounds check
|
|
if (lower == keyFrames.end()) return upper->second.value;
|
|
if (upper == keyFrames.end()) return lower->second.value;
|
|
|
|
float delta = upper->second.value - lower->second.value;
|
|
|
|
// lerp, bitch
|
|
float d = (time - lower->first) / (upper->first - lower->first);
|
|
return lower->second.value + delta * d;
|
|
}
|
|
|
|
bool Track::isKeyFrame(size_t row) const
|
|
{
|
|
return keyFrames.find(row) != keyFrames.end();
|
|
}
|
|
|
|
const Track::KeyFrame *Track::getKeyFrame(size_t row) const
|
|
{
|
|
KeyFrameContainer::const_iterator iter = keyFrames.find(row);
|
|
if (iter == keyFrames.end()) return NULL;
|
|
return &iter->second;
|
|
}
|
|
|
|
void Track::deleteKeyFrame(size_t row)
|
|
{
|
|
keyFrames.erase(row);
|
|
}
|
|
|
|
void Track::setKeyFrame(size_t row, const KeyFrame &keyFrame)
|
|
{
|
|
keyFrames[row] = keyFrame;
|
|
}
|
|
|
|
size_t Track::getFrameCount() const
|
|
{
|
|
if (keyFrames.empty()) return 0;
|
|
KeyFrameContainer::const_iterator iter = keyFrames.end();
|
|
iter--;
|
|
return iter->first;
|
|
}
|