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FIXING THE SO COMMON BVH FOOT SLIDING! Tutorials and Tips.
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Author:  fneill [ Tue Apr 14, 2009 9:22 am ]
Post subject:  FIXING THE SO COMMON BVH FOOT SLIDING! Tutorials and Tips.

I just posted some tips and tricks for elimating bvh foot sliding problems in POSER, MOTIONBUILDER, DAZ STUDIO "ANIMATE" on the Truespace forum. Hope this might help anyone who is interested.... elimating foot sliding will make all your markerless motion captures much more professional.

http://forums1.caligari.com/truespace/showthread.php?t=8229

:)

I have also pasted that info below ...................................

For those of you like me who use Poser, Daz Animate, or MotionBuilder to bring their bvh anim clips in to Truespace there always comes up with that foot sliding problem that is common with bvh files. Deals with a scaling type of issue. Your characters will not look natural if there is foot sliding. Luckily there are some easy fixes. Here are a few quick tutorials or solutions ...

1. In Poser there is a $15.00 program that is worth its weight in gold. I have gotton so quick with it I can fix foot sliding on several thousand frame bvh files in couple minutes. It is located here with great tutorials...
http://www.contentparadise.com/us/user/bvh_constraint_for_poser_product_43302

2. MotionBuilder of course is a breeze! ( I know motionbuilder is expensive but the student version is cheap and there is a free learning edition). Iam trying to get them to come out with a scaled down really cheap version.
In motion builder just use the "KEY AT TIME" function. This is so extremely cool. Just go to the area where the FEET slip. Select the left and right foot effector in the character controls. Lets say the feet slip from from frame 250 to 270. Well just go to a frame in that area where the feet are planted firmly (lets say frame 260 is planted good then in the "KEY AT TIME" window type in 260,250,255,265,270. What this does is sets that firmly planted frame 260 on mulitple keys where the slippage occurs. Overriding the slipping area That literally fixes foot sliding in seconds. MB is sooooo awesome. Free NO RESTRICTIONS 30 day trial here .. http://usa.autodesk.com/adsk/servlet/oc/offer/form?siteID=123112&id=12107678

3. Daz Studio ANIMATE. Some of you like using the free Daz Studio with the ANIMATE plugin to create your bvh clips for Truespace. To fix the FOOT SLIDING there Iam working on that workflow right now. Maybe mrbones/truebones.com will give some input on this (since he is the bvhacker master). What Iam doing is fixing the exported bvh's from Daz Studio ANIMATE in the free bvh hacker http://davedub.co.uk/bvhacker/index.html. Basically bring in that exported bvh from DAZ STUDIO ANIMATE in to bvhacker and do a few tweaks on the feet. I will update more on this shortly.

Anyway, after you get foot sliding taken care of you will be a happy camper :)

:)

Author:  mrbones [ Sun Apr 19, 2009 6:39 pm ]
Post subject:  Re: FIXING THE SO COMMON BVH FOOT SLIDING! Tutorials and Tips.

Thanks! This is informative. Cheers

Author:  mrbones [ Sun Apr 19, 2009 6:43 pm ]
Post subject:  Re: FIXING THE SO COMMON BVH FOOT SLIDING! Tutorials and Tips.

Another option to correct the foot sliding is "PATH SCALE DOWN"

I dont know how this could be accomplished but when I used to create .cob motion files for truespace I corrected the foot slip by shrinking the motion path, NOT THE SKELETON BONES or ANIMATION, Just the path while it was running the animation.

If I shrank the path to much the feet would over grip and or underslip, opposite is true if I Scaled the motion path to large the feet would overslide or undergrip.

Usually just a small amount of scale down to the motion path would do the trick.

I dont know if this information is useful but I thought I would share,

Cheers

Author:  evp_uk [ Thu Nov 25, 2010 6:28 am ]
Post subject:  Re: FIXING THE SO COMMON BVH FOOT SLIDING! Tutorials and Tips.

Also once data is plotted in Motionbuilder the raw animation curves for the positions of all effectors are created this lets you work on position of each node, allowing you to sculpt the required curves for the whole body.. (useful for cleaning all of the nodes not just the feet..)

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