Difference between revisions of "Template:NW4FCurve"
(Also better document start and end frame) |
(Data types for keys are actually different from the frame ones.) |
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| Line 7: | Line 7: | ||
|- | |- | ||
| 0x00 || 2 || UInt16 || '''Flags'''. Sets of bits packed as '''xxxxxxxx xCCCKKFF'''. | | 0x00 || 2 || UInt16 || '''Flags'''. Sets of bits packed as '''xxxxxxxx xCCCKKFF'''. | ||
| − | * '''FF''' determines the data type of frames in the ''Frame array'' | + | * '''FF''' determines the data type of frames in the ''Frame array''. |
{| class="wikitable" | {| class="wikitable" | ||
! Value !! Size !! Type | ! Value !! Size !! Type | ||
| Line 13: | Line 13: | ||
| 0 || 4 || Single | | 0 || 4 || Single | ||
|- | |- | ||
| − | | 1 || 2 || 16-bit fixed point value (1 | + | | 1 || 2 || 16-bit fixed point value (1 bit sign, 10 bits integral and 5 bits fractional) |
|- | |- | ||
| 2 || 1 || Byte | | 2 || 1 || Byte | ||
| + | |} | ||
| + | * '''KK''' determines the data type of keys in the ''Key array''. | ||
| + | {| class="wikitable" | ||
| + | ! Value !! Size !! Type | ||
| + | |- | ||
| + | | 0 || 4 || Single | ||
| + | |- | ||
| + | | 1 || 2 || Int16 | ||
| + | |- | ||
| + | | 2 || 1 || SByte | ||
|} | |} | ||
* '''CCC''' determines what kind of curve data is stored, resulting in a different number of elements stored per Key. The exact meaning on how to interprete these values is unknown, they are used to set the interpolation method from one key to the next. | * '''CCC''' determines what kind of curve data is stored, resulting in a different number of elements stored per Key. The exact meaning on how to interprete these values is unknown, they are used to set the interpolation method from one key to the next. | ||
Revision as of 21:19, 21 June 2017
Curve
Curves store how animations are performed over time and store the required keys and values for this. They appear in multiple animation subfiles, and their header is of 0x24 bytes size (for BFRES versions earlier than 3.4.0.0, they are of 0x1C bytes size).
| Offset | Size | Type | Description | ||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0x00 | 2 | UInt16 | Flags. Sets of bits packed as xxxxxxxx xCCCKKFF.
| ||||||||||||||||||||||||||||||||||||||||||||||||
| 0x02 | 2 | UInt16 | Key count. | ||||||||||||||||||||||||||||||||||||||||||||||||
| 0x04 | 4 | UInt32 | Target Offset, an offset in bytes into the corresponding Animation Data structure to animate the field at that relative address. | ||||||||||||||||||||||||||||||||||||||||||||||||
| 0x08 | 4 | Single | Start frame, the first frame at which a key is placed. | ||||||||||||||||||||||||||||||||||||||||||||||||
| 0x0C | 4 | Single | End frame, the last frame at which a key is placed. | ||||||||||||||||||||||||||||||||||||||||||||||||
| 0x10 | 4 | Int32 / Single | Data scale, multiplier to the raw values to get the final result. | ||||||||||||||||||||||||||||||||||||||||||||||||
| if BFRES version >= 3.4.0.0 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| 0x14 | 4 | Single | Data offset, added to the raw values (after multiplication with Data scale) to get the final result. | ||||||||||||||||||||||||||||||||||||||||||||||||
| 0x18 | 4 | Single | Data delta, stores the difference between the lowest and highest key value. | ||||||||||||||||||||||||||||||||||||||||||||||||
| 0x1C | 4 | Int32 | Frame array offset. | ||||||||||||||||||||||||||||||||||||||||||||||||
| 0x20 | 4 | Int32 | Key array offset. | ||||||||||||||||||||||||||||||||||||||||||||||||
| 0x24 | End of Curve | ||||||||||||||||||||||||||||||||||||||||||||||||||
| else | |||||||||||||||||||||||||||||||||||||||||||||||||||
| 0x14 | 4 | Int32 | Frame array offset. | ||||||||||||||||||||||||||||||||||||||||||||||||
| 0x18 | 4 | Int32 | Key array offset. | ||||||||||||||||||||||||||||||||||||||||||||||||
| 0x1C | End of Curve | ||||||||||||||||||||||||||||||||||||||||||||||||||
Frames
The Curve header points to a Frame array which stores values controlling at which frame a Key from the Key array is placed. Thus, the array has as many elements as specified in Key count. The data type of the frames is given in the Curve's Flags.
The end of the array is aligned to 4 bytes.
Keys
The Curve header points to a Key array which stores the values to apply on transformations or parameters which form the animation. Thus, the array has as many elements as specified in Key count, multiplied by the number of elements stored per key (depended upon the CCC Curve Type bits in the Curve Flags as described above). The type of each element is given by the KK Key Type bits in the Curve Flags.
It is unclear how to exactly interprete the values to form the curve out of it.
The end of the array is aligned to 4 bytes.