The Motion Analysis
HTR (Hierarchical Translation-Rotation) motion-capture file format
is an alternative to the
because it provides flexibility in data types and ordering. It also
has a complete base pose specification, which consists of indicating
the starting point for both rotations and translations.
The stored data is grouped
by segments; all motions from the first segment are read, then those
from the next segment, and so on.
The HTR format contains
four sections: Header, Segment Names & Hierarchy, Base Position,
and the motion data section.
NoteAll section titles
are displayed between square brackets ().
NoteComments within the
HTR file are denoted by a hash mark (#).
The header section contains
global parameter information:
- File type
- Data type
- File version
- Number of segments
- Number of frames
- Data frame rate
- Euler rotation order
- Calibration units
- Rotation units
- Global axis of gravity
- Bone length axis
- Scale factor
HTR2 is nearly identical
to HTR, except that the data from the motion section is organized
differently in order to better suit a streaming data input (a sample-major
ordering is used to present the motion information).
On import, 3ds Max constructs
a FK hierarchy rig from the incoming data. The resulting bone skeleton
is linked to a dummy object named after the HTR file.
Choose this option to build
a new bone skeleton from the incoming data. Default=on.
- Segment Size
Set this value to modify the
scale factor for the weight and height of all bones from the motion
capture data. Only available if Create is active.
NoteThis does not change
the skeleton's scale.
- End Effectors
Toggle this option to import
effectors from the incoming data, if they
exist. Only available if Create is active.
Choose this option to map
the incoming data onto the children of the selected skeleton root
in your scene.
Keyframe Options group
- Base Position
When on, imports only the
keys of the base pose.
When on, imports all animation
Rotation Controller group
Time Options group
These options (except
Set Frame Rate) are only functional if the Animation option in the
Keyframe Options group is enabled.
Choose between using the
entire animation range from the motion capture file, or a defined portion.
These values represent the
start and end frames of the defined range. Only available if Range
Sets the number of inserted
empty frames before the imported animation starts.
NoteThis does not affect
the Base Position setting (in the Keyframe Options group), which
sets a key at frame 0.
- Set Frame Rate
Sets the size of the resulting
NoteThe scale value within 3ds Max remains 100.
Proceeds with HTR/HTR2 import,
using the current settings.