/** @param last May be null. */
private TrackEntry trackEntry(
int trackIndex, Animation animation, boolean loop, TrackEntry last) {
TrackEntry entry = trackEntryPool.obtain();
entry.trackIndex = trackIndex;
entry.animation = animation;
entry.loop = loop;
entry.eventThreshold = 0;
entry.attachmentThreshold = 0;
entry.drawOrderThreshold = 0;
entry.animationStart = 0;
entry.animationEnd = animation.getDuration();
entry.animationLast = -1;
entry.nextAnimationLast = -1;
entry.delay = 0;
entry.trackTime = 0;
entry.trackLast = -1;
entry.nextTrackLast = -1;
entry.trackEnd = Float.MAX_VALUE;
entry.timeScale = 1;
entry.alpha = 1;
entry.mixAlpha = 1;
entry.mixTime = 0;
entry.mixDuration = last == null ? 0 : data.getMix(last.animation, animation);
return entry;
}
/**
* Poses the skeleton using the track entry animations. There are no side effects other than
* invoking listeners, so the animation state can be applied to multiple skeletons to pose them
* identically.
*/
public void apply(Skeleton skeleton) {
if (skeleton == null) throw new IllegalArgumentException("skeleton cannot be null.");
if (animationsChanged) animationsChanged();
Array<Event> events = this.events;
for (int i = 0, n = tracks.size; i < n; i++) {
TrackEntry current = tracks.get(i);
if (current == null || current.delay > 0) continue;
// Apply mixing from entries first.
float mix = current.alpha;
if (current.mixingFrom != null) mix *= applyMixingFrom(current, skeleton);
else if (current.trackTime >= current.trackEnd) //
mix = 0; // Set to setup pose the last time the entry will be applied.
// Apply current entry.
float animationLast = current.animationLast, animationTime = current.getAnimationTime();
int timelineCount = current.animation.timelines.size;
Object[] timelines = current.animation.timelines.items;
if (mix == 1) {
for (int ii = 0; ii < timelineCount; ii++)
((Timeline) timelines[ii])
.apply(skeleton, animationLast, animationTime, events, 1, true, false);
} else {
boolean firstFrame = current.timelinesRotation.size == 0;
if (firstFrame) current.timelinesRotation.setSize(timelineCount << 1);
float[] timelinesRotation = current.timelinesRotation.items;
boolean[] timelinesFirst = current.timelinesFirst.items;
for (int ii = 0; ii < timelineCount; ii++) {
Timeline timeline = (Timeline) timelines[ii];
if (timeline instanceof RotateTimeline) {
applyRotateTimeline(
timeline,
skeleton,
animationTime,
mix,
timelinesFirst[ii],
timelinesRotation,
ii << 1,
firstFrame);
} else
timeline.apply(
skeleton, animationLast, animationTime, events, mix, timelinesFirst[ii], false);
}
}
queueEvents(current, animationTime);
events.clear();
current.nextAnimationLast = animationTime;
current.nextTrackLast = current.trackTime;
}
queue.drain();
}
private float applyMixingFrom(TrackEntry entry, Skeleton skeleton) {
TrackEntry from = entry.mixingFrom;
if (from.mixingFrom != null) applyMixingFrom(from, skeleton);
float mix;
if (entry.mixDuration == 0) // Single frame mix to undo mixingFrom changes.
mix = 1;
else {
mix = entry.mixTime / entry.mixDuration;
if (mix > 1) mix = 1;
}
Array<Event> events = mix < from.eventThreshold ? this.events : null;
boolean attachments = mix < from.attachmentThreshold, drawOrder = mix < from.drawOrderThreshold;
float animationLast = from.animationLast, animationTime = from.getAnimationTime();
int timelineCount = from.animation.timelines.size;
Object[] timelines = from.animation.timelines.items;
boolean[] timelinesFirst = from.timelinesFirst.items;
float alpha = from.alpha * entry.mixAlpha * (1 - mix);
boolean firstFrame = from.timelinesRotation.size == 0;
if (firstFrame) from.timelinesRotation.setSize(timelineCount << 1);
float[] timelinesRotation = from.timelinesRotation.items;
for (int i = 0; i < timelineCount; i++) {
Timeline timeline = (Timeline) timelines[i];
boolean setupPose = timelinesFirst[i];
if (timeline instanceof RotateTimeline)
applyRotateTimeline(
timeline,
skeleton,
animationTime,
alpha,
setupPose,
timelinesRotation,
i << 1,
firstFrame);
else {
if (!setupPose) {
if (!attachments && timeline instanceof AttachmentTimeline) continue;
if (!drawOrder && timeline instanceof DrawOrderTimeline) continue;
}
timeline.apply(skeleton, animationLast, animationTime, events, alpha, setupPose, true);
}
}
if (entry.mixDuration > 0) queueEvents(from, animationTime);
this.events.clear();
from.nextAnimationLast = animationTime;
from.nextTrackLast = from.trackTime;
return mix;
}