ANIM (File Format): Difference between revisions

Jump to navigation Jump to search

ANIM (File Format) (view source)

Revision as of 05:02, 23 February 2015

2,169 bytes added ,  23 February 2015
no edit summary
VisualWikitext
imported>Jackoalan
No edit summary
imported>Jackoalan
No edit summary
Line 1: Line 1:
{{research|1|Having trouble with bone rotations +/- 180 degrees in format 2}}
{{research|1|Having trouble with bone rotations +/- 180 degrees in format 2}}
The '''ANIM format''' is used in conjunction with the [[CINF (File Format)|CINF]] and [[CSKR (File Format)|CSKR]]
The '''ANIM format''' is used in conjunction with [[CINF (File Format)|CINF]] and [[CSKR (File Format)|CSKR]]
to animate rigged [[CMDL (File Format)|CMDL meshes]].
rigging to animate [[CMDL (File Format)|CMDL meshes]].


There are two versions of the ANIM format in ''Metroid Prime'' (indicated by the file's first long value):
There are two versions of the ANIM format in ''Metroid Prime'' (indicated by the file's first long value):
Line 39: Line 39:
|header‑>bone_entry_count
|header‑>bone_entry_count
|bone_entry_map
|bone_entry_map
|The index-positions of this table correspond to the ''bone ids'' in the associated [[CINF (File Format)|CINF]]. The value is 0xff if the bone is not animated by this ANIM or an index relating the ''bone_translation_map'' and ''quaternion_key_array'' below
|The index-positions of this table correspond to the ''Bone IDs'' in the associated [[CINF (File Format)|CINF]]. The value is 0xff if the bone is not animated by this ANIM or an index relating the ''bone_translation_map'' and ''quaternion_key_array'' below
|-
|-
|long
|long
Line 130: Line 130:
== Rotation Vector Bitstream Format ==
== Rotation Vector Bitstream Format ==


The '''Rotation Vector Bitstream Format''' is the most widely used animation format in ''Metroid Prime''.
The '''Rotation Vector Bitstream Format''' (0x2) is the most widely used animation format in ''Metroid Prime''.
The format uses a compressed [[wikipedia:Bitstream|bitstream]] to store keys that have been
The format uses a compressed [[wikipedia:Bitstream|bitstream]] to store keys that have been
[[wikipedia:Delta encoding|delta encoded]] and [[wikipedia:Quantization (signal processing)|quantized]]
[[wikipedia:Delta encoding|delta encoded]] and [[wikipedia:Quantization (signal processing)|quantized]]
to make for a very compact, compressed animation. The data is processed sequentially to reconstruct the
to make for a very compact, compressed animation. The data is processed sequentially to reconstruct the
decompressed bone channel data.
uncompressed bone channel data.


In addition to the bitstream quantization, the format includes a bitmap specifying which frames of the animation have
In addition to the bitstream quantization, the format includes a bitmap specifying which frames of the animation have
keys added. Consequently, the runtime constructs missing keys via interpolation (reducing animation size further).  
keys added. Consequently, the runtime generates missing keys via interpolation (reducing animation size further).  
 
{| class="wikitable"
!Data Type
!Element Count
!Identifier
!Notes
|-
|[[#Header2|Header2]]
|1
|header
|
|-
|long
|round_up(header‑>key_bitmap_length / 32)
|key_bitmap
|Word-packed bitmap. Each word is read from least-significant to most-significant bit. A set bit indicates the frame at the bit's position has keys for each bone channel.
|-
|long
|1
|bone_channel_count
|Count of animated bone channels (matches header‑>bone_channel_count)
|-
|long
|1
|bone_channel_count
|Duplicate channel count for some reason
|-
|[[#Bone Channel Descriptor|Bone Channel Descriptor]]
|header‑>bone_channel_count
|bone_channel_descriptor_array
|Array describing animated bone channels
|}


=== Header2 ===
=== Header2 ===
Line 218: Line 250:
|long
|long
|key_bitmap_length
|key_bitmap_length
|Number of bits in ''key bitmap''
|Number of bits in ''key_bitmap''
|}
|}


=== Bone Channel Descriptor ===
{| class="wikitable"
!Offset
!Length
!Data Type
!Identifier
!Notes
|-
|0x0
|4
|long
|bone_id
|''Bone ID'' in the associated [[CINF (File Format)|CINF]] for this bone channel
|-
|0x4
|2
|short
|key_count
|Number of keys in the bitstream for this bone channel (same value for all channels in animation)
|-
|0x6
|2
|short
|initial_rx
|Initial X value of bone's rotation vector
|-
|0x8
|1
|char
|q_rx
|Number of bits allocated to bone's ''rx'' in bitstream
|-
|0x9
|2
|short
|initial_ry
|Initial Y value of bone's rotation vector
|-
|0xB
|1
|char
|q_ry
|Number of bits allocated to bone's ''ry'' in bitstream
|-
|0xC
|2
|short
|initial_rz
|Initial Z value of bone's rotation vector
|-
|0xE
|1
|char
|q_rz
|Number of bits allocated to bone's ''rz'' in bitstream
|-
|0xF
|2
|short
|translation_key_count
|If this bone channel has an animated translation, its value will match ''key_count'', otherwise the value will be 0.
'''If the value is 0, this descriptor ends here'''
|-
|0x11
|2
|short
|initial_tx
|Initial X value of bone's translation vector
|-
|0x13
|1
|char
|q_tx
|Number of bits allocated to bone's ''tx'' in bitstream
|-
|0x14
|2
|short
|initial_ty
|Initial Y value of bone's translation vector
|-
|0x16
|1
|char
|q_ty
|Number of bits allocated to bone's ''ty'' in bitstream
|-
|0x17
|2
|short
|initial_tz
|Initial Z value of bone's translation vector
|-
|0x19
|1
|char
|q_tz
|Number of bits allocated to bone's ''tz'' in bitstream
|}


[[Category:File Formats]]
[[Category:File Formats]]
Anonymous user
Retrieved from "https://wiki.axiodl.com/w/Special:MobileDiff/1308"

Navigation menu