Motion (.MOT) File Format

Note: This page pertains to Reverse Engineering of Okami File Formats.

Explanation

This file incorporates curves and/or properties for an given embbed model. Because of that, it's almost always certain that they are contained in a file container (dat). There's instances of mots that controlled properties instead of bones, so it's not always certain of what it animates. A further inspection have to be done.

Mot main header

Offset	Type	Size	Description
0x00	uint32_t	4	File identifier (Magic number).
0x04	uint16_t	2	Animation's frame count.
0x06	uint8_t	1	Animation's property count.
0x07	uint8_t	1	Loop flag, sets if the animation either loops or not (1/0).

on Offset 8, The File gives informations about the curves, i.e: what bone it animates, etc.

Curve Info

Offset	Type	Size	Description
0x00	int8_t	1	Bone index (-1 means it animates the mode's root bone).
0x01	int8_t	1	Curve properties (See below).
0x02	uint16_t	2	Curve keyframe count.

The curve property will define what property of the bone/object it is animating. There's some properties who could not be determined yet. See some already identified values bellow.

Curve Properties (Already identified)

Value	Property Family	Property
0	Single Pose	Position X
1	Single Pose	Position Y
2	Single Pose	Position Z
3	Single Pose	Rotation X
4	Single Pose	Rotation Y
5	Single Pose	Rotation Z
6	Single Pose	Scale X
7	Single Pose	Scale Y
8	Single Pose	Scale Z
16	Quantized Curve	Position X
17	Quantized Curve	Position Y
18	Quantized Curve	Position Z
19	Quantized Curve	Rotation X
20	Quantized Curve	Rotation Y
21	Quantized Curve	Rotation Z
22	Quantized Curve	Scale X
23	Quantized Curve	Scale Y
24	Quantized Curve	Scale Z
50	Semi-Precision Curve	Position X
51	Semi-Precision Curve	Position Y
52	Semi-Precision Curve	Position Z
53	Semi-Precision Curve	Rotation X
54	Semi-Precision Curve	Rotation Y
55	Semi-Precision Curve	Rotation Z
56	Semi-Precision Curve	Scale X
57	Semi-Precision Curve	Scale Y
58	Semi-Precision Curve	Scale Z
80	Full-Precision Curve	Position X
81	Full-Precision Curve	Position Y
82	Full-Precision Curve	Position Z
83	Full-Precision Curve	Rotation X
84	Full-Precision Curve	Rotation Y
85	Full-Precision Curve	Rotation Z
86	Full-Precision Curve	Scale X
87	Full-Precision Curve	Scale Y
88	Full-Precision Curve	Scale Z