private void InternalStep(TimeSpan time)
{
DoPlayStates();
var delayEndpoint = _delay;
var iterationEndpoint = delayEndpoint + _duration;
var iterationTime = time;
//determine if time is currently in the first iteration.
if (time >= TimeSpan.Zero & time <= iterationEndpoint)
{
_currentIteration = 1;
}
else if (time > iterationEndpoint)
{
//Subtract first iteration to properly get the subsequent iteration time
iterationTime -= iterationEndpoint;
if (!_iterationDelay & delayEndpoint > TimeSpan.Zero)
{
delayEndpoint = TimeSpan.Zero;
iterationEndpoint = _duration;
}
//Calculate the current iteration number
_currentIteration = Math.Min(_repeatCount, (int)Math.Floor((double)((double)iterationTime.Ticks / iterationEndpoint.Ticks)) + 2);
}
else
{
return;
}
// Determine if the current iteration should have its normalized time inverted.
bool isCurIterReverse = _animationDirection == PlaybackDirection.Normal ? false :
_animationDirection == PlaybackDirection.Alternate ? (_currentIteration % 2 == 0) ? false : true :
_animationDirection == PlaybackDirection.AlternateReverse ? (_currentIteration % 2 == 0) ? true : false :
_animationDirection == PlaybackDirection.Reverse ? true : false;
if (!_isLooping)
{
var totalTime = _iterationDelay ? _repeatCount * (_duration.Ticks + _delay.Ticks) : _repeatCount * _duration.Ticks + _delay.Ticks;
if (time.Ticks >= totalTime)
{
var easedTime = _easeFunc.Ease(isCurIterReverse ? 0.0 : 1.0);
_lastInterpValue = _interpolator(easedTime, _neutralValue);
DoComplete();
return;
}
}
iterationTime = TimeSpan.FromTicks((long)(iterationTime.Ticks % iterationEndpoint.Ticks));
if (delayEndpoint > TimeSpan.Zero & iterationTime < delayEndpoint)
{
DoDelay();
}
else
{
// Offset the delay time
iterationTime -= delayEndpoint;
iterationEndpoint -= delayEndpoint;
// Normalize time
var interpVal = (double)iterationTime.Ticks / iterationEndpoint.Ticks;
if (isCurIterReverse)
{
interpVal = 1 - interpVal;
}
// Ease and interpolate
var easedTime = _easeFunc.Ease(interpVal);
_lastInterpValue = _interpolator(easedTime, _neutralValue);
PublishNext(_lastInterpValue);
}
}
private void InternalStep(TimeSpan systemTime)
{
DoPlayStatesAndTime(systemTime);
var time = _internalClock - _firstFrameCount;
var delayEndpoint = _delay;
var iterationEndpoint = delayEndpoint + _duration;
//determine if time is currently in the first iteration.
if (time >= TimeSpan.Zero & time <= iterationEndpoint)
{
_currentIteration = 1;
}
else if (time > iterationEndpoint)
{
//Subtract first iteration to properly get the subsequent iteration time
time -= iterationEndpoint;
if (!_iterationDelay & delayEndpoint > TimeSpan.Zero)
{
delayEndpoint = TimeSpan.Zero;
iterationEndpoint = _duration;
}
//Calculate the current iteration number
_currentIteration = (int)Math.Floor((double)time.Ticks / iterationEndpoint.Ticks) + 2;
}
else
{
_previousClock = systemTime;
return;
}
time = TimeSpan.FromTicks(time.Ticks % iterationEndpoint.Ticks);
if (!_isLooping)
{
if (_currentIteration > _repeatCount)
{
DoComplete();
}
if (time > iterationEndpoint)
{
DoComplete();
}
}
// Determine if the current iteration should have its normalized time inverted.
bool isCurIterReverse = _animationDirection == PlaybackDirection.Normal ? false :
_animationDirection == PlaybackDirection.Alternate ? (_currentIteration % 2 == 0) ? false : true :
_animationDirection == PlaybackDirection.AlternateReverse ? (_currentIteration % 2 == 0) ? true : false :
_animationDirection == PlaybackDirection.Reverse ? true : false;
if (delayEndpoint > TimeSpan.Zero & time < delayEndpoint)
{
DoDelay();
}
else
{
// Offset the delay time
time -= delayEndpoint;
iterationEndpoint -= delayEndpoint;
// Normalize time
var interpVal = (double)time.Ticks / iterationEndpoint.Ticks;
if (isCurIterReverse)
{
interpVal = 1 - interpVal;
}
// Ease and interpolate
var easedTime = _easeFunc.Ease(interpVal);
_lastInterpValue = _interpolator(easedTime, _neutralValue);
PublishNext(_lastInterpValue);
}
}
private void InternalStep(TimeSpan time)
{
DoPlayStates();
FetchProperties();
// Scale timebases according to speedratio.
var indexTime = time.Ticks;
var iterDuration = _duration.Ticks * _speedRatioConv;
var iterDelay = _iterationDelay.Ticks * _speedRatioConv;
var initDelay = _initialDelay.Ticks * _speedRatioConv;
if (indexTime > 0 & indexTime <= initDelay)
{
DoDelay();
}
else
{
// Calculate timebases.
var iterationTime = iterDuration + iterDelay;
var opsTime = indexTime - initDelay;
var playbackTime = opsTime % iterationTime;
_currentIteration = (ulong)(opsTime / iterationTime);
// Stop animation when the current iteration is beyond the iteration count
// and snap the last iteration value to exact values.
if ((_currentIteration + 1) > _iterationCount)
{
var easedTime = _easeFunc.Ease(_playbackReversed ? 0.0 : 1.0);
_lastInterpValue = _interpolator(easedTime, _neutralValue);
DoComplete();
}
if (playbackTime <= iterDuration)
{
// Normalize time for interpolation.
var normalizedTime = playbackTime / iterDuration;
// Check if normalized time needs to be reversed according to PlaybackDirection
switch (_playbackDirection)
{
case PlaybackDirection.Normal:
_playbackReversed = false;
break;
case PlaybackDirection.Reverse:
_playbackReversed = true;
break;
case PlaybackDirection.Alternate:
_playbackReversed = (_currentIteration % 2 == 0) ? false : true;
break;
case PlaybackDirection.AlternateReverse:
_playbackReversed = (_currentIteration % 2 == 0) ? true : false;
break;
default:
throw new InvalidOperationException($"Animation direction value is unknown: {_playbackDirection}");
}
if (_playbackReversed)
{
normalizedTime = 1 - normalizedTime;
}
// Ease and interpolate
var easedTime = _easeFunc.Ease(normalizedTime);
_lastInterpValue = _interpolator(easedTime, _neutralValue);
PublishNext(_lastInterpValue);
}
else if (playbackTime > iterDuration &
playbackTime <= iterationTime &
iterDelay > 0)
{
// The last iteration's trailing delay should be skipped.
if ((_currentIteration + 1) < _iterationCount)
{
DoDelay();
}
else
{
DoComplete();
}
}
}
}