/**
* Helper method to apply one animation to either an objectmap for blending or directly to the
* bones.
*/
protected static void applyAnimation(
final ObjectMap<Node, Transform> out,
final Pool<Transform> pool,
final float alpha,
final Animation animation,
final float time) {
for (final NodeAnimation nodeAnim : animation.nodeAnimations) {
final Node node = nodeAnim.node;
node.isAnimated = true;
// Find the keyframe(s)
final int n = nodeAnim.keyframes.size - 1;
int first = 0, second = -1;
for (int i = 0; i < n; i++) {
if (time >= nodeAnim.keyframes.get(i).keytime
&& time <= nodeAnim.keyframes.get(i + 1).keytime) {
first = i;
second = i + 1;
break;
}
}
// Apply the first keyframe:
final Transform transform = tmpT;
final NodeKeyframe firstKeyframe = nodeAnim.keyframes.get(first);
transform.set(firstKeyframe.translation, firstKeyframe.rotation, firstKeyframe.scale);
// Lerp the second keyframe
if (second > first) {
final NodeKeyframe secondKeyframe = nodeAnim.keyframes.get(second);
final float t =
(time - firstKeyframe.keytime) / (secondKeyframe.keytime - firstKeyframe.keytime);
transform.lerp(
secondKeyframe.translation, secondKeyframe.rotation, secondKeyframe.scale, t);
}
// Apply the transform, either directly to the bone or to out when blending
if (out == null) transform.toMatrix4(node.localTransform);
else {
if (out.containsKey(node)) {
if (alpha == 1.f) out.get(node).set(transform);
else out.get(node).lerp(transform, alpha);
} else {
out.put(node, pool.obtain().set(transform));
}
}
}
}