Fixes for Transformers: Fall of Cybertron

https://www.gildor.org/smf/index.php/topic,7866.0.html

Author: gildor2

MeshInstance/SkelMeshInstance.cpp

@@ -507,8 +507,8 @@ void CSkelMeshInstance::UpdateSkeleton()
 			BoneDebug.AnimRotation = Bone.Orientation;
 #endif // SHOW_ANIM
 
-			// compute bone orientation
-			if (AnimSeq1 && AnimBoneIndex != INDEX_NONE && AnimSeq1->Tracks[AnimBoneIndex]->HasKeys())
+			// compute bone orientation, take care of empty Tracks array
+			if (AnimSeq1 && AnimBoneIndex != INDEX_NONE && AnimSeq1->Tracks.IsValidIndex(AnimBoneIndex) && AnimSeq1->Tracks[AnimBoneIndex]->HasKeys())
 			{
 				// get bone position from track
 				if (!AnimSeq2 || Chn->SecondaryBlend != 1.0f)

Unreal/UnrealMesh/UnAnim3.cpp

@@ -299,6 +299,12 @@ void UAnimSequence::DecodeTrans3Anims(CAnimSequence *Dst, UAnimSet *Owner) const
 {
 	guard(UAnimSequence::DecodeTrans3Anims);
 
+	if (CompressedByteStream.Num() == 0)
+	{
+		// This situation is true for some sequences
+		return;
+	}
+
 	// read some counts first
 	FMemReader Reader1(Trans3Data.GetData(), Trans3Data.Num());
 	Reader1.SetupFrom(*Package);