WorldViz User Forum  

Go Back   WorldViz User Forum > Vizard

Reply
 
Thread Tools Rating: Thread Rating: 2 votes, 5.00 average. Display Modes
  #1  
Old 11-19-2010, 10:19 PM
shivanangel shivanangel is offline
Member
 
Join Date: Feb 2006
Location: New Jersey
Posts: 182
Talking Clarification on CAL3D Avatar Animation in Vizard

Hello,

I am having what I hope to be a simple problem with Cal3D and Avatars.

I am working on a research project to hook up a Brain Computer Interface
with our virtual reality system. In one of the tests, I have created a
hand inside of 3D Studio Max with an animation of it squeezing a ball.

The animation is expected to be played in segments inside of Vizard.
As the user 'thinks' of the correct response, the fist will begin to close
more and more. If they think correctly for every response, the first should end up in a completely closed position.
As we are sampling their responses, the hand is expected to close more and more to indicate to the user they are doing the right thing. I exported out all the model, material,
and skeleton objects properly.

For the animation I've tried exporting:

1) the entire closing animation (all 125 frames in one animation)
2) segments of the animation divided every 5 frames (0-5 is one animation, 5-10 is another, 10-15 is another and so on.)
3) segments of the animation divided every 0-> n frame (0-5 is the first, 0-10 is the second, 0-15 is the third and so on...)

My question comes down to what would be the easiest way to
set up this gradual animation inside of Vizard.

I've tried using the execute, state, setting the speed to zero to freeze
the animation at the end or setting the 'freeze' parameter to True, however
I am never able to get the incremental animations inside of Vizard to work properly.

If I try and increment using the the divided animation, I end up getting small changes that don't quite equal the expected animation.
The hand ends up only half closing. If I try and use the full animation, I don't see a way provided to incrementally move through the animation.

Perhaps I am missing something fundamental about the CAL3D format and exporting? Must the start and end of all animations be the the same positions?
I seem to be having some kind of offset problem when I try and run the individual animation segments one after another.
What should take 25 steps to do instead takes far more. The hand never seems to more in the proper increments as I play animations 0-5, 5-10, 10-15 ... and all the way up to the end.

The Hand In Max completely clenched


If I just run the final animation or the full animation, it moves to the correct location:


However, if I try and run them in increments, I only get part way before
I should have already completely closed the fist.


Thank you for your time, I hope I'm overlooking something simple!
~George Lecakes @ Rowan University VR Lab
Reply With Quote
  #2  
Old 11-22-2010, 02:41 AM
sleiN13 sleiN13 is offline
Member
 
Join Date: Dec 2008
Posts: 83
I don't know for sure if I have the solution for you but from experience with vizard and animation (animation chains) there are a couple of things you need to take into account.

The last frame from the previous animation should be the same as the first frame of the next animation else you get jumps.

The animation has to be completed completly before the next animation starts else they will blend and the and influence each other.

The idlepose will be assumed when your animation ends this can cause jumps if the last frame of the animation differs from the idlepose in my experience. I solved it by changing the idlepose to reflect the end position of the animation.

I hope this gives you some ideas to solve your problems
Reply With Quote
  #3  
Old 11-22-2010, 07:16 AM
shivanangel shivanangel is offline
Member
 
Join Date: Feb 2006
Location: New Jersey
Posts: 182
sleiN13,

Thanks for the ideas, I'll give it a shot later today and see
if that resolved my issues.

~George
Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Collision and avatar animation shahramy Vizard 2 10-26-2010 11:47 PM
avatar automatically runs animation after fading into view v-clizzin Vizard 1 10-14-2009 05:01 PM
2d text placing to max animation in vizard kasdeja Vizard 2 07-07-2009 01:34 PM
Vizard tech tip: Using the Python Imaging Library (PIL) Jeff Vizard 0 03-23-2009 11:13 AM
avatar animation problems jrodman Vizard 1 01-18-2006 09:12 AM


All times are GMT -7. The time now is 11:26 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright 2002-2023 WorldViz LLC