Re: [Nel] animation problem

[Cyril 'Hulud' Corvazier]

Hi Andi,

 

>NL3D::UAnimation *testAnimation = CAnimationManager::instance().AnimationSet->getAnimation(0);
>NL3D::UTrack *testTrack = testAnimation->getTrackByName("pos");

 

1) At each frame, you must provide final instance positions to NeL. So you have to know where your characters are placed. In Ryzom,

the character loop looks like that :

 

* First look at the animation tracks for the root node. Evaluate the position / rotation tracks :

 

NL3D::UTrack *testTrackPos = testAnimation->getTrackByName("pos");

NL3D::UTrack *testTrackQuat = testAnimation->getTrackByName("rotquat");

 

CVector resultPos;

testTrackPos->interpolate(animationLocalTime, resultPos);

CQuat resultQuat;

testTrackQuat->interpolate(animationLocalTime, resultQuat);

 

* Build a matrix:

 

CMatrix mt;

mt.identity();

mt.setRot (resultQuat);

mt.setPos (resultPos);

 

* Transform the local animation matrix in the world with the world matrix "where the animation cycle started".

 

CMatrix mtWhereAnimationStarted;

CMatrix finalCharacterMt = mtWhereAnimationStarted * mt;

 

* Set the skeleton's world matrix

 

skeleton->setMatrix (finalCharacterMt);

 

* When the animation cycle ends, reset the mtWhereAnimationStarted matrix and start a new animation cycle.

 

if (animationLocalTime >= animationLength)

{

    mtWhereAnimationStarted = finalCharacterMt

    animationLocalTime = 0;

}

else

{

    animationLocalTime += elapsedTime;

}

 

This code should move your character in world space with a local space animation.

 

2) Now, you have to setup the "detailed animations" system. The "detailed animations" are evaluated automatically by the NeL engine if the instance is visible. "Detailed animations" are bones animations, material animations...

 

First, create an animation set. (UScene::createAnimationSet()).

Then, add all your animations you need for your character into it. (UAnimationSet::addAnimation()).

Once it is done, build the animation set (UAnimationSet::build()).

You have an animation set ready to use with a play list.

 

Create a playlist manager (UScene::createPlayListManager()).

Create a playlist for your character (UPlayListManager::createPlayList(), use one playlist by character).

Get your animation id (uint walkId = UAnimationSet::getAnimationIdByName("walk")).

 

At the begin of each animation cycle, setup your playlist:

    PlayList->setAnimation (0, walkId);

    PlayList->setTimeOrigin (0, currentTime);

 

At each frame, animate the playlists

    PlayListMngr->animate (currentTime);

 

Your character should be animated.

 

Happy hacking,

 

Hld.

 

----- Original Message -----

From: Andi 'Debug' Allen

To: Developer's list for the NeL platform

Sent: Friday, February 20, 2004 3:47 AM

Subject: Re: [Nel] animation problem

hey cyril

 

hate to be a pain old chap

 

but this

 

- Evaluate the current animation time (ie where the animation must by played)

- Get the matrix of the root bone from the current animation (evalute the "pos" and the "rotquat" tracks and build a matrix)

- Translate the matrix with your snaped world position (if need be, rotate it)

- Set the final skeleton world matrix. (Skeleton->setMatrix (finalRootBoneWorldMatrix))

 

ive looked at the animation system and trying to get my head around it

 

how do i do this could you shoot me a quick example if thats ok

 

in my head im thinking

 

animationset of animations

playlists of animations from animation set

each entity has a playlist

 

i need to iterate entities

then get their playlist

then it gets fuzzy...

 

how do i get the current animation time per entity per animation

 

how do i evaluate the pos and rotquat tracks via that i assume which is gained via  getTrackByName

 

this i would of done like this

 

NL3D::UAnimation *testAnimation = CAnimationManager::instance().AnimationSet->getAnimation(0);
NL3D::UTrack *testTrack = testAnimation->getTrackByName("pos");

 

but if we are adjusting each entity via its own playlist? i think im just a little confused as of how

to proceed

 

then how do i use that id to get the