|0x00||res_id||01 62 04 00||1122||01122-.TRTA|
|0x04||lev_id||01 00 00 06||3||level 3|
|0x1E||int16||13 00||19||array size|
|First bone offset (black outline)|
|0x00||float||00 00 00 00||0||x-offset of bone (pelvis) with respect to parent|
|0x04||float||00 00 00 00||0||y-offset of bone (pelvis) with respect to parent|
|0x08||float||00 00 00 00||0||z-offset of bone (pelvis) with respect to parent|
- The hierarchy of the bones (parents, children, siblings) is defined in the TRIA file (linked to from the same TRCM file as the TRTA).
- If the (0°, 0°, 0°) orientation is set for every bone, then all the bones point along the X axis of the character (from right to left) and face upwards.
- Viewed from above, you get something like this : "o" is a pivot (yes, the shoulders are attached to the neck), and ":)" is a smiley :)
14-o-13-o-12-o-11-o 3-o-2-o-1-o ^ z | | ^ :)10-o-9-o-8-o-7-o-0 < < <^< < < | | x ^ 18-o-17-o-16-o-15-o 6-o-5-o-4-o ^
- XYZ offsets
- The XYZ-offsets in the TRTA are offsets (aka "translations") of a bone relative to its parent in that system of coordinates (see above).
- Thus they effectively specify the relative positions of the joints.
- Not sure how many different TRTA there are in Oni. Probably one for every major ONCC.
- Pelvis is further translated with respect to the root bone by the height track of TRAM
- The root bone is translated by TRAM as well as by the physics engine (jumps, blasts).
- Maybe overlay TRAMs generate extra translations of the bones, too.
- Relevant offsets
- You may notice that X and Y offset for thighs and shoulders is very small (it's the left/right i.e. Z that matters there).
- For all the other bones, the offset is essentially along X (i.e. along the main axis of the bone meshes). Y and Z offsets are very small.
- So X/Y offsets of shoulders and thighs can basically be set to zero, as well as Y/Z offsets of all the other bones.
- A skeleton is primarily defined by the Z offsets of shoulders and thighs (broad/narrow shoulders and hips), and by the X offset (effectively, the length) of all the other bones.
|ONI BINARY DATA|
|TRSC << Other file types >> TSFF|
|TRTA : Totoro Quaternion Body Translation Array|