8

Filtering M otion-Capture and Marker Data 913
is done using the Motion Capture Conversion
Parameters rollout.
Other filtering options include footstep filtering
and extraction, looping the data, and importing a
portion of the motion-capture file.
3ds Max ships with a variety of raw (unfiltered)
motion-capture data files, in
.bip , .csm ,and .bvh
formats. Someofthesamedataisavailablein
filtered versions, either with footsteps or freeform.
Try your own filtering adjustments on the raw
versions of this data. Importing the raw data
displays the original motion very accurately when
you select Show Buffer on the Motion Capture
rollout. Use the Motion Capture buffer as a guide
when adjusting and refining the filtered data.
Several tools are available in the Motion Capture
rollout to aid you in this process.
Create your own library of imported and
optimized motion capture data by saving
.bip files
forusewithothercharacters,oraspartofalonger
script in Motion Flow mo de. Use a biped that has
no mesh attached with Physique.
Tip: Overall,youimportthedata,adjustittoyour
liking, and save it as a
.bip file. You can also run
standard
.bip files through this filtering process to
createloopsortoextractfootstepsfromafreeform
animation.
Note: Marker files, such as .csm , contain position
data. Hierarchical motion-capture files, such as
.bvh , contain joint rotation data.
Motion Capture rollout
Character Studio Mark er Files
The .csm format (page 3–1019) is an ASCII file
used to impor t positional marker data from
motion-capture systems onto a biped.
The Show Markers command displays marker positions and
names.
Procedures
To import a motion capture f ile:
1.
Select a biped in the v iew ports.
2. On the Motion Capture rollout, click
Load Motion Capture File.
3. Choose the file type: .bvh , .bip ,or .csm .
Search for files in the
cstudio\motions\mocap
directories.
Tip: .csm marker fi les, loaded for the first time,
should b e imported with no key reduction
and no footstep extraction. This enables the
calibration buttons. Marker files t ypically need
some calibration.