bool AnimationClip::update(float elapsedTime)
{
if (isClipStateBitSet(CLIP_IS_PAUSED_BIT))
{
return false;
}
if (isClipStateBitSet(CLIP_IS_MARKED_FOR_REMOVAL_BIT))
{
// If the marked for removal bit is set, it means stop() was called on the AnimationClip at some point
// after the last update call. Reset the flag, and return true so the AnimationClip is removed from the
// running clips on the AnimationController.
onEnd();
return true;
}
if (!isClipStateBitSet(CLIP_IS_STARTED_BIT))
{
// Clip is just starting
onBegin();
}
else
{
// Clip was already running
_elapsedTime += elapsedTime * _speed;
if (_repeatCount == REPEAT_INDEFINITE && _elapsedTime <= 0)
{
// Elapsed time is moving backwards, so wrap it back around the end when it falls below zero
_elapsedTime = _activeDuration + _elapsedTime;
// TODO: account for _loopBlendTime
}
}
// Current time within a loop of the clip
float currentTime = 0.0f;
// Check to see if clip is complete.
if (_repeatCount != REPEAT_INDEFINITE && ((_speed >= 0.0f && _elapsedTime >= _activeDuration) || (_speed <= 0.0f && _elapsedTime <= 0.0f)))
{
// We finished our active duration (including repeats), so clamp to our end value.
resetClipStateBit(CLIP_IS_STARTED_BIT);
// Ensure we end off at the endpoints of our clip (-speed==0, +speed==_duration)
currentTime = _speed < 0.0f ? 0.0f : _duration;
}
else
{
// If _duration == 0, we have a "pose". Just set currentTime to 0.
if (_duration == 0)
{
currentTime = 0.0f;
}
else
{
// Animation is running normally.
currentTime = fmodf(_elapsedTime, _duration + _loopBlendTime);
}
}
// Notify any listeners of Animation events.
if (_listeners)
{
GP_ASSERT(_listenerItr);
if (_speed >= 0.0f)
{
while (*_listenerItr != _listeners->end() && _elapsedTime >= (long) (**_listenerItr)->_eventTime)
{
GP_ASSERT(_listenerItr);
GP_ASSERT(**_listenerItr);
GP_ASSERT((**_listenerItr)->_listener);
(**_listenerItr)->_listener->animationEvent(this, Listener::TIME);
++*_listenerItr;
}
}
else
{
while (*_listenerItr != _listeners->begin() && _elapsedTime <= (long) (**_listenerItr)->_eventTime)
{
GP_ASSERT(_listenerItr);
GP_ASSERT(**_listenerItr);
GP_ASSERT((**_listenerItr)->_listener);
(**_listenerItr)->_listener->animationEvent(this, Listener::TIME);
--*_listenerItr;
}
}
}
// Add back in start time, and divide by the total animation's duration to get the actual percentage complete
GP_ASSERT(_animation);
// Compute percentage complete for the current loop (prevent a divide by zero if _duration==0).
// Note that we don't use (currentTime/(_duration+_loopBlendTime)). That's because we want a
// % value that is outside the 0-1 range for loop smoothing/blending purposes.
float percentComplete = _duration == 0 ? 1 : currentTime / (float)_duration;
if (_loopBlendTime == 0.0f)
percentComplete = MATH_CLAMP(percentComplete, 0.0f, 1.0f);
// If we're cross fading, compute blend weights
if (isClipStateBitSet(CLIP_IS_FADING_OUT_BIT))
{
GP_ASSERT(_crossFadeToClip);
GP_ASSERT(_crossFadeOutDuration > 0);
if (isClipStateBitSet(CLIP_IS_FADING_OUT_STARTED_BIT)) // Calculate elapsed time since the fade out begin.
{
GP_ASSERT(_crossFadeToClip);
_crossFadeOutElapsed = (Game::getGameTime() - _crossFadeToClip->_timeStarted) * fabs(_speed);
resetClipStateBit(CLIP_IS_FADING_OUT_STARTED_BIT);
}
else
{
// continue tracking elapsed time.
_crossFadeOutElapsed += elapsedTime * fabs(_speed);
}
if (_crossFadeOutElapsed < _crossFadeOutDuration)
{
// Calculate this clip's blend weight.
float tempBlendWeight = ((float)_crossFadeOutDuration - _crossFadeOutElapsed) / (float)_crossFadeOutDuration;
// If this clip is fading in, adjust the crossfade clip's weight to be a percentage of your current blend weight
if (isClipStateBitSet(CLIP_IS_FADING_IN_BIT))
{
_crossFadeToClip->_blendWeight = (1.0f - tempBlendWeight) * _blendWeight;
_blendWeight -= _crossFadeToClip->_blendWeight;
}
else
{
// Just set the blend weight.
_crossFadeToClip->_blendWeight = (1.0f - tempBlendWeight);
_blendWeight = tempBlendWeight;
}
}
else
{
// Fade is done.
_crossFadeToClip->_blendWeight = 1.0f;
_blendWeight = 0.0f;
resetClipStateBit(CLIP_IS_STARTED_BIT);
resetClipStateBit(CLIP_IS_FADING_OUT_BIT);
_crossFadeToClip->resetClipStateBit(CLIP_IS_FADING_IN_BIT);
SAFE_RELEASE(_crossFadeToClip);
}
}
// Evaluate this clip.
Animation::Channel* channel = NULL;
AnimationValue* value = NULL;
AnimationTarget* target = NULL;
size_t channelCount = _animation->_channels.size();
float percentageStart = (float)_startTime / (float)_animation->_duration;
float percentageEnd = (float)_endTime / (float)_animation->_duration;
float percentageBlend = (float)_loopBlendTime / (float)_animation->_duration;
for (size_t i = 0; i < channelCount; i++)
{
channel = _animation->_channels[i];
GP_ASSERT(channel);
target = channel->_target;
GP_ASSERT(target);
value = _values[i];
GP_ASSERT(value);
// Evaluate the point on Curve
GP_ASSERT(channel->getCurve());
channel->getCurve()->evaluate(percentComplete, percentageStart, percentageEnd, percentageBlend, value->_value);
// Set the animation value on the target property.
target->setAnimationPropertyValue(channel->_propertyId, value, _blendWeight);
}
// When ended. Probably should move to it's own method so we can call it when the clip is ended early.
if (isClipStateBitSet(CLIP_IS_MARKED_FOR_REMOVAL_BIT) || !isClipStateBitSet(CLIP_IS_STARTED_BIT))
{
onEnd();
return true;
}
return false;
}
bool AnimationClip::update(float elapsedTime)
{
if (isClipStateBitSet(CLIP_IS_PAUSED_BIT))
{
return false;
}
else if (isClipStateBitSet(CLIP_IS_MARKED_FOR_REMOVAL_BIT))
{ // If the marked for removal bit is set, it means stop() was called on the AnimationClip at some point
// after the last update call. Reset the flag, and return true so the AnimationClip is removed from the
// running clips on the AnimationController.
onEnd();
return true;
}
else if (!isClipStateBitSet(CLIP_IS_STARTED_BIT))
{
onBegin();
}
else
{
_elapsedTime += elapsedTime * _speed;
if (_repeatCount == REPEAT_INDEFINITE && _elapsedTime <= 0)
_elapsedTime = _activeDuration + _elapsedTime;
}
float currentTime = 0.0f;
// Check to see if clip is complete.
if (_repeatCount != REPEAT_INDEFINITE && ((_speed >= 0.0f && _elapsedTime >= _activeDuration) || (_speed <= 0.0f && _elapsedTime <= 0.0f)))
{
resetClipStateBit(CLIP_IS_STARTED_BIT);
if (_speed >= 0.0f)
{
// If _duration == 0, we have a "pose". Just set currentTime to 0.
if (_duration == 0)
{
currentTime = 0.0f;
}
else
{
currentTime = (float)(_activeDuration % _duration); // Get's the fractional part of the final repeat.
if (currentTime == 0.0f)
currentTime = _duration;
}
}
else
{
currentTime = 0.0f; // If we are negative speed, the end value should be 0.
}
}
else
{
// If _duration == 0, we have a "pose". Just set currentTime to 0.
if (_duration == 0)
currentTime = 0.0f;
else // Gets portion/fraction of the repeat.
currentTime = fmodf(_elapsedTime, _duration);
}
// Notify any listeners of Animation events.
if (_listeners)
{
GP_ASSERT(_listenerItr);
if (_speed >= 0.0f)
{
while (*_listenerItr != _listeners->end() && _elapsedTime >= (long) (**_listenerItr)->_eventTime)
{
GP_ASSERT(_listenerItr);
GP_ASSERT(**_listenerItr);
GP_ASSERT((**_listenerItr)->_listener);
(**_listenerItr)->_listener->animationEvent(this, Listener::TIME);
++*_listenerItr;
}
}
else
{
while (*_listenerItr != _listeners->begin() && _elapsedTime <= (long) (**_listenerItr)->_eventTime)
{
GP_ASSERT(_listenerItr);
GP_ASSERT(**_listenerItr);
GP_ASSERT((**_listenerItr)->_listener);
(**_listenerItr)->_listener->animationEvent(this, Listener::TIME);
--*_listenerItr;
}
}
}
// Add back in start time, and divide by the total animation's duration to get the actual percentage complete
GP_ASSERT(_animation);
// If the animation duration is zero (start time == end time, such as when there is only a single keyframe),
// then prevent a divide by zero and set percentComplete = 1.
float percentComplete = _animation->_duration == 0 ? 1 : ((float)_startTime + currentTime) / (float)_animation->_duration;
percentComplete = MATH_CLAMP(percentComplete, 0.0f, 1.0f);
if (isClipStateBitSet(CLIP_IS_FADING_OUT_BIT))
{
GP_ASSERT(_crossFadeToClip);
GP_ASSERT(_crossFadeOutDuration > 0);
if (isClipStateBitSet(CLIP_IS_FADING_OUT_STARTED_BIT)) // Calculate elapsed time since the fade out begin.
{
GP_ASSERT(_crossFadeToClip);
_crossFadeOutElapsed = (Game::getGameTime() - _crossFadeToClip->_timeStarted) * fabs(_speed);
resetClipStateBit(CLIP_IS_FADING_OUT_STARTED_BIT);
}
else
{
// continue tracking elapsed time.
_crossFadeOutElapsed += elapsedTime * fabs(_speed);
}
if (_crossFadeOutElapsed < _crossFadeOutDuration)
{
// Calculate this clip's blend weight.
float tempBlendWeight = ((float)_crossFadeOutDuration - _crossFadeOutElapsed) / (float)_crossFadeOutDuration;
// If this clip is fading in, adjust the crossfade clip's weight to be a percentage of your current blend weight
if (isClipStateBitSet(CLIP_IS_FADING_IN_BIT))
{
_crossFadeToClip->_blendWeight = (1.0f - tempBlendWeight) * _blendWeight;
_blendWeight -= _crossFadeToClip->_blendWeight;
}
else
{
// Just set the blend weight.
_crossFadeToClip->_blendWeight = (1.0f - tempBlendWeight);
_blendWeight = tempBlendWeight;
}
}
else
{
// Fade is done.
_crossFadeToClip->_blendWeight = 1.0f;
_blendWeight = 0.0f;
resetClipStateBit(CLIP_IS_STARTED_BIT);
resetClipStateBit(CLIP_IS_FADING_OUT_BIT);
_crossFadeToClip->resetClipStateBit(CLIP_IS_FADING_IN_BIT);
SAFE_RELEASE(_crossFadeToClip);
}
}
// Evaluate this clip.
Animation::Channel* channel = NULL;
AnimationValue* value = NULL;
AnimationTarget* target = NULL;
size_t channelCount = _animation->_channels.size();
for (size_t i = 0; i < channelCount; i++)
{
channel = _animation->_channels[i];
GP_ASSERT(channel);
target = channel->_target;
GP_ASSERT(target);
value = _values[i];
GP_ASSERT(value);
// Evaluate the point on Curve
GP_ASSERT(channel->getCurve());
channel->getCurve()->evaluate(percentComplete, value->_value);
// Set the animation value on the target property.
target->setAnimationPropertyValue(channel->_propertyId, value, _blendWeight);
}
// When ended. Probably should move to it's own method so we can call it when the clip is ended early.
if (isClipStateBitSet(CLIP_IS_MARKED_FOR_REMOVAL_BIT) || !isClipStateBitSet(CLIP_IS_STARTED_BIT))
{
onEnd();
return true;
}
return false;
}