Difference between revisions of "Template:NW4FCurve"

From MK8
Jump to navigation Jump to search
(→‎Curve: Key array is aligned by 4 bytes aswell)
(Elements per key, I actually described it at the bottom already but I got rid of the redundance now.)
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'', and '''KK''' determines the data type of keys in the ''Key array''. They both map to the same flags.
+
* '''FF''' determines the data type of frames in the ''Frame array'', and '''KK''' determines the data type of keys in the ''Key array''. They both map to the same relative flags.
 
{| class="wikitable"
 
{| class="wikitable"
−
! Value !! Data Type
+
! Value !! Size !! Type
 
|-
 
|-
−
| 0 || 32-bit number
+
| 0 || 4 || Single
 
|-
 
|-
−
| 1 || 16-bit number
+
| 1 || 2 || Int16
 
|-
 
|-
−
| 2 || 8-bit number or Boolean
+
| 2 || 1 || Byte
 
|}
 
|}
−
* '''CCC''' determines what kind of curve data is stored.
+
* '''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 apparently used to set the interpolation method from one key to the next.
 
{| class="wikitable"
 
{| class="wikitable"
−
! Value !! Description !! Meaning
+
! Value !! Description !! Elements per Key
 
|-
 
|-
−
| 0 || Cubic Single || 4 values of the corresponding data type.
+
| 0 || Cubic Single || 4
 
|-
 
|-
−
| 1 || Linear Single || 2 values of the corresponding data type.
+
| 1 || Linear Single || 2
 
|-
 
|-
−
| 2 || Baked Single || 1 value of the corresponding data type.
+
| 2 || Baked Single || 1
 
|-
 
|-
−
| 4 || Step Integer || 1 value of the corresponding data type.
+
| 4 || Step Integer || 1
 
|-
 
|-
−
| 5 || Baked Integer || ''Unknown''.
+
| 5 || Baked Integer || 1
 
|-
 
|-
−
| 6 || Step Boolean || Each value is 1 bit.
+
| 6 || Step Boolean || 1
 
|-
 
|-
−
| 7 || Baked Boolean || ''Unknown''.
+
| 7 || Baked Boolean || 1
 
|}
 
|}
 
|-
 
|-
Line 73: Line 73:
 
=== Keys ===
 
=== 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''. Each element is actually a vector of a different size, the size dependent upon the CCC Curve Type bits in the Curve ''Flags''.
+
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''.
−
{| class="wikitable"
 
−
! Curve Type !! Vector Elements
 
−
|-
 
−
| Cubic Single || 4
 
−
|-
 
−
| Linear Single || 2
 
−
|-
 
−
| other || 1
 
−
|}
 
−
The type of a vector element is given by the KK Key Type bits in the Curve ''Flags''.
 
  
 
The end of the array is aligned to 4 bytes.
 
The end of the array is aligned to 4 bytes.

Revision as of 14:04, 6 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 0x20 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.
  • FF determines the data type of frames in the Frame array, and KK determines the data type of keys in the Key array. They both map to the same relative flags.
Value Size Type
0 4 Single
1 2 Int16
2 1 Byte
  • 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 apparently used to set the interpolation method from one key to the next.
Value Description Elements per Key
0 Cubic Single 4
1 Linear Single 2
2 Baked Single 1
4 Step Integer 1
5 Baked Integer 1
6 Step Boolean 1
7 Baked Boolean 1
0x02 2 UInt16 Key count.
0x04 4 UInt32 Target type. Controls what exactly is manipulated by the curve. Differs in each subfile.
0x08 4 Single Start frame.
0x0C 4 Single End frame.
0x10 4 Int32 / Single Data scale.
if BFRES version >= 3.4.0.0
0x14 4 Single Data delta.
0x18 4 Int32 Frame array offset.
0x1C 4 Int32 Key array offset.
0x20 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.

The end of the array is aligned to 4 bytes.

Retrieved from "https://mk8.tockdom.com/w/index.php?title=Template:NW4FCurve&oldid=4002"