Ogre::NodeAnimationTrack Class Reference

Specialised AnimationTrack for dealing with node transforms. More...

#include <OgreAnimationTrack.h>

Inheritance diagram for Ogre::NodeAnimationTrack:

List of all members.

Public Member Functions

NodeAnimationTrack (Animation *parent, unsigned short handle)

Constructor.

NodeAnimationTrack (Animation *parent, unsigned short handle, Node *targetNode)

Constructor, associates with a Node.

virtual TransformKeyFrame * createNodeKeyFrame (Real timePos)

Creates a new KeyFrame and adds it to this animation at the given time index.

virtual Node * getAssociatedNode (void) const

Returns a pointer to the associated Node object (if any).

virtual void setAssociatedNode (Node *node)

Sets the associated Node object which will be automatically affected by calls to 'apply'.

virtual void applyToNode (Node *node, Real timePos, Real weight=1.0, bool accumulate=false, Real scale=1.0f)

As the 'apply' method but applies to a specified Node instead of associated node.

virtual void setUseShortestRotationPath (bool useShortestPath)

Sets the method of rotation calculation.

virtual bool getUseShortestRotationPath () const

Gets the method of rotation calculation.

void getInterpolatedKeyFrame (Real timeIndex, KeyFrame *kf) const

Remarks:: The KeyFrame objects held by this class are transformation snapshots at discrete points in time. Normally however, you want to interpolate between these keyframes to produce smooth movement, and this method allows you to do this easily. In animation terminology this is called 'tweening'.

Parameters:

timeIndex	The time (in relation to the whole animation sequence)
kf	Keyframe object to store results

void apply (Real timePos, Real weight=1.0, bool accumulate=false, Real scale=1.0f)

Parameters:

timePos	The time position in the animation to apply.
weight	The influence to give to this track, 1.0 for full influence, less to blend with other animations.
acculumate	Don't make weights relative to overall weights applied, make them absolute and just add.
scale	The scale to apply to translations and scalings, useful for adapting an animation to a different size target.

void _keyFrameDataChanged (void) const

virtual TransformKeyFrame * getNodeKeyFrame (unsigned short index) const

Returns the KeyFrame at the specified index.

virtual bool hasNonZeroKeyFrames (void) const

Method to determine if this track has any KeyFrames which are doing anything useful - can be used to determine if this track can be optimised out.

virtual void optimise (void)

Optimise the current track by removing any duplicate keyframes.

unsigned short getHandle (void) const

Get the handle associated with this track.

virtual unsigned short getNumKeyFrames (void) const

Returns the number of keyframes in this animation.

virtual KeyFrame * getKeyFrame (unsigned short index) const

Returns the KeyFrame at the specified index.

virtual Real getKeyFramesAtTime (Real timePos, KeyFrame **keyFrame1, KeyFrame **keyFrame2, unsigned short *firstKeyIndex=0) const

Gets the 2 KeyFrame objects which are active at the time given, and the blend value between them.

virtual KeyFrame * createKeyFrame (Real timePos)

Creates a new KeyFrame and adds it to this animation at the given time index.

virtual void removeKeyFrame (unsigned short index)

Removes a KeyFrame by it's index.

virtual void removeAllKeyFrames (void)

Removes all the KeyFrames from this track.

Protected Types

typedef std::vector< KeyFrame * > KeyFrameList

Protected Member Functions

KeyFrame * createKeyFrameImpl (Real time)

Specialised keyframe creation.

virtual void buildInterpolationSplines (void) const

Protected Attributes

Node * mTargetNode

bool mSplineBuildNeeded

bool mUseShortestRotationPath

Defines if rotation is done using shortest path.

KeyFrameList

mKeyFrames

Real

mMaxKeyFrameTime

Animation * mParent

unsigned short mHandle

Detailed Description

Specialised AnimationTrack for dealing with node transforms.

Definition at line 224 of file OgreAnimationTrack.h.

Member Typedef Documentation

typedef std::vector<KeyFrame*> Ogre::AnimationTrack::KeyFrameList [protected, inherited]

Definition at line 151 of file OgreAnimationTrack.h.

Constructor & Destructor Documentation

Ogre::NodeAnimationTrack::NodeAnimationTrack ( Animation * parent,

unsigned short handle

)

Constructor.

Ogre::NodeAnimationTrack::NodeAnimationTrack ( Animation * parent,

unsigned short handle,

Node * targetNode

)

Constructor, associates with a Node.

Member Function Documentation

void Ogre::NodeAnimationTrack::_keyFrameDataChanged ( void ) const [virtual]

Reimplemented from Ogre::AnimationTrack.

void Ogre::NodeAnimationTrack::apply ( Real timePos,

Real weight = 1.0,

bool accumulate = false,

Real scale = 1.0f

) [virtual]

Parameters:

timePos The time position in the animation to apply.

weight The influence to give to this track, 1.0 for full influence, less to blend with other animations.

acculumate Don't make weights relative to overall weights applied, make them absolute and just add.

scale The scale to apply to translations and scalings, useful for adapting an animation to a different size target.

Implements Ogre::AnimationTrack.

virtual void Ogre::NodeAnimationTrack::applyToNode ( Node * node,

Real timePos,

Real weight = 1.0,

bool accumulate = false,

Real scale = 1.0f

) [virtual]

As the 'apply' method but applies to a specified Node instead of associated node.

virtual void Ogre::NodeAnimationTrack::buildInterpolationSplines ( void ) const [protected, virtual]

virtual KeyFrame* Ogre::AnimationTrack::createKeyFrame ( Real timePos ) [virtual, inherited]

Creates a new KeyFrame and adds it to this animation at the given time index.

Remarks:
It is better to create KeyFrames in time order. Creating them out of order can result in expensive reordering processing. Note that a KeyFrame at time index 0.0 is always created for you, so you don't need to create this one, just access it using getKeyFrame(0);

Parameters:

timePos The time from which this KeyFrame will apply.

KeyFrame* Ogre::NodeAnimationTrack::createKeyFrameImpl ( Real time ) [protected, virtual]

Specialised keyframe creation.

Implements Ogre::AnimationTrack.

virtual TransformKeyFrame* Ogre::NodeAnimationTrack::createNodeKeyFrame ( Real timePos ) [virtual]

Creates a new KeyFrame and adds it to this animation at the given time index.

Remarks:
It is better to create KeyFrames in time order. Creating them out of order can result in expensive reordering processing. Note that a KeyFrame at time index 0.0 is always created for you, so you don't need to create this one, just access it using getKeyFrame(0);

Parameters:

timePos The time from which this KeyFrame will apply.

virtual Node* Ogre::NodeAnimationTrack::getAssociatedNode ( void ) const [virtual]

Returns a pointer to the associated Node object (if any).

unsigned short Ogre::AnimationTrack::getHandle ( void ) const [inherited]

Get the handle associated with this track.

Definition at line 66 of file OgreAnimationTrack.h.

void Ogre::NodeAnimationTrack::getInterpolatedKeyFrame ( Real timeIndex,

KeyFrame * kf

) const [virtual]

Remarks:
The KeyFrame objects held by this class are transformation snapshots at discrete points in time. Normally however, you want to interpolate between these keyframes to produce smooth movement, and this method allows you to do this easily. In animation terminology this is called 'tweening'.

Parameters:

timeIndex The time (in relation to the whole animation sequence)

kf Keyframe object to store results

Implements Ogre::AnimationTrack.

virtual KeyFrame* Ogre::AnimationTrack::getKeyFrame ( unsigned short index ) const [virtual, inherited]

Returns the KeyFrame at the specified index.

virtual Real Ogre::AnimationTrack::getKeyFramesAtTime ( Real timePos,

KeyFrame ** keyFrame1,

KeyFrame ** keyFrame2,

unsigned short * firstKeyIndex = 0

) const [virtual, inherited]

Gets the 2 KeyFrame objects which are active at the time given, and the blend value between them.

Remarks:
At any point in time in an animation, there are either 1 or 2 keyframes which are 'active', 1 if the time index is exactly on a keyframe, 2 at all other times i.e. the keyframe before and the keyframe after.

This method returns those keyframes given a time index, and also returns a parametric value indicating the value of 't' representing where the time index falls between them. E.g. if it returns 0, the time index is exactly on keyFrame1, if it returns 0.5 it is half way between keyFrame1 and keyFrame2 etc.

Parameters:

timePos The time index in seconds.

keyFrame1 Pointer to a KeyFrame pointer which will receive the pointer to the keyframe just before or at this time index.

keyFrame2 Pointer to a KeyFrame pointer which will receive the pointer to the keyframe just after this time index.

firstKeyIndex Pointer to an unsigned short which, if supplied, will receive the index of the 'from' keyframe incase the caller needs it.

Returns:
Parametric value indicating how far along the gap between the 2 keyframes the timePos value is, e.g. 0.0 for exactly at 1, 0.25 for a quarter etc. By definition the range of this value is: 0.0 <= returnValue < 1.0 .

virtual TransformKeyFrame* Ogre::NodeAnimationTrack::getNodeKeyFrame ( unsigned short index ) const [virtual]

Returns the KeyFrame at the specified index.

virtual unsigned short Ogre::AnimationTrack::getNumKeyFrames ( void ) const [virtual, inherited]

Returns the number of keyframes in this animation.

virtual bool Ogre::NodeAnimationTrack::getUseShortestRotationPath ( ) const [virtual]

Gets the method of rotation calculation.

virtual bool Ogre::NodeAnimationTrack::hasNonZeroKeyFrames ( void ) const [virtual]

Method to determine if this track has any KeyFrames which are doing anything useful - can be used to determine if this track can be optimised out.

Reimplemented from Ogre::AnimationTrack.

virtual void Ogre::NodeAnimationTrack::optimise ( void ) [virtual]

Optimise the current track by removing any duplicate keyframes.

Reimplemented from Ogre::AnimationTrack.

virtual void Ogre::AnimationTrack::removeAllKeyFrames ( void ) [virtual, inherited]

Removes all the KeyFrames from this track.

virtual void Ogre::AnimationTrack::removeKeyFrame ( unsigned short index ) [virtual, inherited]

Removes a KeyFrame by it's index.

virtual void Ogre::NodeAnimationTrack::setAssociatedNode ( Node * node ) [virtual]

Sets the associated Node object which will be automatically affected by calls to 'apply'.

virtual void Ogre::NodeAnimationTrack::setUseShortestRotationPath ( bool useShortestPath ) [virtual]

Sets the method of rotation calculation.

Member Data Documentation

unsigned short Ogre::AnimationTrack::mHandle [protected, inherited]

Definition at line 155 of file OgreAnimationTrack.h.

KeyFrameList Ogre::AnimationTrack::mKeyFrames [protected, inherited]

Definition at line 152 of file OgreAnimationTrack.h.

Real Ogre::AnimationTrack::mMaxKeyFrameTime [protected, inherited]

Definition at line 153 of file OgreAnimationTrack.h.

Animation* Ogre::AnimationTrack::mParent [protected, inherited]

Definition at line 154 of file OgreAnimationTrack.h.

SimpleSpline Ogre::NodeAnimationTrack::mPositionSpline [mutable, protected]

Definition at line 288 of file OgreAnimationTrack.h.

RotationalSpline Ogre::NodeAnimationTrack::mRotationSpline [mutable, protected]

Definition at line 290 of file OgreAnimationTrack.h.

SimpleSpline Ogre::NodeAnimationTrack::mScaleSpline [mutable, protected]

Definition at line 289 of file OgreAnimationTrack.h.

bool Ogre::NodeAnimationTrack::mSplineBuildNeeded [mutable, protected]

Definition at line 287 of file OgreAnimationTrack.h.

Node* Ogre::NodeAnimationTrack::mTargetNode [protected]

Definition at line 285 of file OgreAnimationTrack.h.

bool Ogre::NodeAnimationTrack::mUseShortestRotationPath [mutable, protected]

Defines if rotation is done using shortest path.

Definition at line 292 of file OgreAnimationTrack.h.

The documentation for this class was generated from the following file:

OgreAnimationTrack.h