public static TimelineClip CreateClipOnTrack(Type playableAssetType, Object assignableObject, TrackAsset parentTrack, double candidateTime, WindowState state)
{
if (parentTrack == null)
{
return(null);
}
bool revertClipMode = false;
// Ideally this is done automatically by the animation track,
// but it's editor only because it does animation clip manipulation
var animTrack = parentTrack as AnimationTrack;
if (animTrack != null && animTrack.CanConvertToClipMode())
{
animTrack.ConvertToClipMode();
revertClipMode = true;
}
TimelineClip newClip = null;
if (TypeUtility.IsConcretePlayableAsset(playableAssetType))
{
try
{
newClip = parentTrack.CreateClipOfType(playableAssetType);
}
catch (InvalidOperationException) {} // expected on a mismatch
}
if (newClip == null)
{
if (revertClipMode)
{
animTrack.ConvertFromClipMode(animTrack.timelineAsset);
}
Debug.LogWarningFormat("Cannot create a clip of type {0} on a track of type {1}", playableAssetType.Name, parentTrack.GetType().Name);
return(null);
}
AddClipOnTrack(newClip, parentTrack, candidateTime, assignableObject, state);
return(newClip);
}
