59 lines
2.0 KiB
Ucode
59 lines
2.0 KiB
Ucode
|
/**
|
||
|
|
* Copyright 1998-2013 Epic Games, Inc. All Rights Reserved.
|
||
|
|
*
|
||
|
|
* Allows a chain of bones to 'trail' behind its head.
|
||
|
|
*/
|
||
|
|
class SkelControlTrail extends SkelControlBase
|
||
|
|
native(Anim);
|
||
|
|
|
||
|
|
cpptext
|
||
|
|
{
|
||
|
|
// USkelControlBase interface
|
||
|
|
virtual void TickSkelControl(FLOAT DeltaSeconds, USkeletalMeshComponent* SkelComp);
|
||
|
|
virtual void GetAffectedBones(INT BoneIndex, USkeletalMeshComponent* SkelComp, TArray<INT>& OutBoneIndices);
|
||
|
|
virtual void CalculateNewBoneTransforms(INT BoneIndex, USkeletalMeshComponent* SkelComp, TArray<FBoneAtom>& OutBoneTransforms);
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Number of bones above the active one in the hierarchy to modify. */
|
||
|
|
var(Trail) int ChainLength;
|
||
|
|
|
||
|
|
/** Axis of the bones to point along trail. */
|
||
|
|
var(Trail) EAxis ChainBoneAxis;
|
||
|
|
|
||
|
|
/** Invert the direction specified in ChainBoneAxis. */
|
||
|
|
var(Trail) bool bInvertChainBoneAxis;
|
||
|
|
|
||
|
|
/** Limit the amount that a bone can stretch from its ref-pose length. */
|
||
|
|
var(Trail) bool bLimitStretch;
|
||
|
|
|
||
|
|
/** How quickly we 'relax' the bones to their animated positions. */
|
||
|
|
var(Trail) float TrailRelaxation;
|
||
|
|
|
||
|
|
/** If bLimitStretch is true, this indicates how long a bone can stretch beyond its length in the ref-pose. */
|
||
|
|
var(Trail) float StretchLimit;
|
||
|
|
|
||
|
|
/** 'Fake' velocity applied to bones. */
|
||
|
|
var(Trail) vector FakeVelocity;
|
||
|
|
|
||
|
|
/** Whether 'fake' velocity should be applied in actor or world space. */
|
||
|
|
var(Trail) bool bActorSpaceFakeVel;
|
||
|
|
|
||
|
|
/** Internal use - we need the timestep to do the relaxation in CalculateNewBoneTransforms. */
|
||
|
|
var float ThisTimstep;
|
||
|
|
|
||
|
|
/** Did we have a non-zero ControlStrength last frame. */
|
||
|
|
var bool bHadValidStrength;
|
||
|
|
|
||
|
|
/** Component-space locations of the bones from last frame. Each frame these are moved towards their 'animated' locations. */
|
||
|
|
var transient array<vector> TrailBoneLocations;
|
||
|
|
|
||
|
|
/** LocalToWorld used last frame, used for building transform between frames. */
|
||
|
|
var transient matrix OldLocalToWorld;
|
||
|
|
|
||
|
|
defaultproperties
|
||
|
|
{
|
||
|
|
ChainLength=2
|
||
|
|
ChainBoneAxis=AXIS_X
|
||
|
|
TrailRelaxation=10.0
|
||
|
|
}
|