Outdated code on UDN

[Crusha K. Rool]

This article: http://udn.epicgames.com/Three/RootMotion.html

At the bottom is a code snippet that performs some operations that have changed in newer UDK versions and would be rejected by the compiler.
Namely:

simulated event OnAnimEnd(AnimNodeSequence SeqNode)

got it's header changed to

simulated event OnAnimEnd(AnimNodeSequence SeqNode, float PlayedTime, float ExcessTime)

and

   // Turn on Root Motion on Animation node
   SeqNode.RootBoneOption[0] = RBA_Translate;
   SeqNode.RootBoneOption[1] = RBA_Translate;
   SeqNode.RootBoneOption[2] = RBA_Translate;

   […]

   // Discard root motion. So mesh stays locked in place.
   // We need this to properly blend out to another animation
   SeqNode.RootBoneOption[0] = RBA_Discard;
   SeqNode.RootBoneOption[1] = RBA_Discard;
   SeqNode.RootBoneOption[2] = RBA_Discard;

are no longer possible because the array is declared to be constant in UnrealScript, so you have to use a native setter function

   // Turn on Root Motion on Animation node
   SeqNode.SetRootBoneAxisOption(RBA_Translate, RBA_Translate, RBA_Translate);

   […]

   // Discard root motion. So mesh stays locked in place.
   // We need this to properly blend out to another animation
   SeqNode.SetRootBoneAxisOption(RBA_Discard, RBA_Discard, RBA_Discard);

Also, why is that code accessing the mesh with Pawn.Mesh, despite the code already taking place in the Pawn class?

[reinrag]

Yeah i noticed that Pawn.Mesh thing weird thing to be honest, and anyway i think you'll get an error unrecognized Pawn if you do that in the pawn class, i already tried to do a trace from the pawn i wrote Pawn.Location i get an error unrecognized pawn, i then remembered i need to do it on the PC, i guess it's just a mistake from them, Jeff usually writes quickly but if we are sure that this is an error then we should tell him, btw thanks for this page never noticed it before this will be a big help for me,

[Crusha K. Rool]

Bumpety bump. Just because threads get easily overlooked here with all the user documentation.

[Crusha K. Rool]

Found another "issue". On the article about AnimationNodes, it provides some example code for the AimOffset node (further down here): http://udn.epicgames.com/Three/Anima...mNodeAimOffset


That code will only work by default for Pawns that have absolutely no rotation applied, otherwise you may end up in situations where the aim will only be used when the player is behind that Pawn or what not, depending on it's rotation.

To fix it, just add this to the line:

[…]

simulated function Tick(float DeltaTime)
{
  local PlayerController PlayerController;

  Super.Tick(DeltaTime);

  PlayerController = GetALocalPlayerController();
  if (PlayerController != None && PlayerController.Pawn != None && AimNode != None)
  {
    DesiredAim = Rotator(Normal(Location - PlayerController.Pawn.Location) << Rotation);

    […]