Multiple Animation problem on .X file

[yocc]

I made .x file that contains two animations.
They are "walk" and "jump". "walk" has more frames than "jump".

I loaded that AnimatedMesh, and tried to play these animations.

then.. "walk" animation was right. But "jump" animation was incorrect.
Probably "walk" animation was played after "jump" animation.


And I set current animation to "jump" with IAnimatedMeshX::setCurrentAnimation("jump"),
and read framecount with IAnimatedMeshX::getFrameCount().

But IAnimatedMeshX::getFrameCount() returns framecount of "walk", not "jump".


I think IAnimatedMeshX must have framecount property each animationset.


P.S.: Sorry for my broken English cos I am Japanese.

[niko]

Yep, sorry, multiple animations are not supported currently in .x files.

[Cristian]

Here's a workaround:
Use a base frame and develop all your motions around it.

[etcaptor]

This problem rises up again

But IAnimatedMeshX::getFrameCount() returns framecount of "walk", not "jump".

I think IAnimatedMeshX must have framecount property each animationset.

That is because in CAnimatedMeshSceneNode.cpp framecount is calculated by mesh->getFramecount(); But this does not work properly for .X files with multyple animations. So, you will get frame count for you first AnimationSet.

Yep, sorry, multiple animations are not supported currently in .x files.

I just taked a look n sources and found that multiple animations are upported in CXAnimationPlayer, but something is mising.

So, these classes are involved:
- IAnimatedMeshX
- CXAnimationPlayer /Implementation of IAnimatedMeshX/
- CAnimatedMeshSceneNode
- CXFileReader

As I wrote CXAnimationPlayer supports multiple animations. CAnimatedMeshSceneNode::render() function takes a mesh from CXAnimationPlayer class by its
getMesh(s32 frame, s32 detailLevel, s32 startFrameLoop, s32 endFrameLoop)function,
but gives it wrong endFrameLoop parameter. This parameter must be different for different animation sets.

I wrote one solution:
1. In file CXFileReader.h define an function for get number of frames of any frameset:

Code: Select all

    //! returns number of frames in an AnimationSet by etcaptor
    s32 getFramesNumber(s32 animationSet, s32 animation=0, s32 key=0);

2. In file CXFileReader.cpp we make a definition of this function:

Code: Select all

//! returns number of frames in an AnimationSet by etcaptor
s32 CXFileReader::getFramesNumber(s32 animationSet, s32 animation, s32 key )
{
    return  AnimationSets[animationSet].Animations[animation].Keys[key].numberOfKeys;
}

3. In file CXAnimationPlayer.cpp we must calculate number of frames for current selected animation:

Code: Select all

//! animates the skeleton based on the animation data
void CXAnimationPlayer::animateSkeleton()
....
....
        LastAnimationTime = Reader->getFramesNumber(CurrentAnimationSet) -1; //by etcaptor

	}


	// update all joints
...

4. In file CAnimatedMeshSceneNode.cpp we use right frame number for current selected animation of the XMesh:

Code: Select all

//! renders the node.
void CAnimatedMeshSceneNode::render()
...
...
	s32 frame = getFrameNr();

    //! by etcaptor
    if (Mesh->getMeshType() == EAMT_X)
    {
        EndFrame = ((IAnimatedMeshX*)Mesh)->getFrameCount();
    }
...

That is all. Now multiple animations must work.

[drac_gd]

many thanks ecaptor.. Just what I needed.

[etcaptor]

Well, but still another problem stays open:
If you apply animation to any X mesh, this animation will be applied to all nodes sharing this mesh by mesh cashe
I saw that this dissadventage does not affects md2 nodes, so will try to find any issue.