ANIM (Metroid Prime): Difference between revisions

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ANIM (Metroid Prime) (view source)

Revision as of 00:04, 6 May 2016

470 bytes added ,  6 May 2016
→‎Rotation Vector Bitstream Format (Compressed)
VisualWikitext
>Aruki
>Aruki
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== Rotation Vector Bitstream Format (Compressed) ==
== Rotation Vector Bitstream Format (Compressed) ==


The '''Rotation Vector Bitstream Format''' (0x2) is the most widely used animation format in ''Metroid Prime''.
The '''Rotation Vector Bitstream Format''' (0x2) is the most widely used animation format.
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]]
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=== Key Values ===
=== Key Values ===
When decoding the animation, each bone's rotation (and possibly translation) values are initialized to the ''Initial *''
When decoding the animation, each bone's attribute values are initialized to the ''Initial *''
values in the ''bone channel descriptors''. For every frame of every bone channel, the key value in the bitstream is ''added''
values in the ''bone channel descriptors''. For every frame of every bone channel, the key value in the bitstream is ''added''
with the previous key value (to resolve the delta encoding).  
with the previous key value (to resolve the delta encoding).  
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</pre>
</pre>


Translation components are multiplied by ''Translation Multiplier'', yielding world units.
Translation components are multiplied by ''Translation Multiplier'', and scale components are multiplied by ''Scale Multiplier''.


=== Layout ===
=== Layout ===


{| class="wikitable"
{| class="wikitable"
!Offset
!Type
!Type
!style="width: 220px;"|Element Count
!style="width: 220px;"|Element Count
!style="width: 240px;"|Name
!style="width: 240px;"|Name
!Notes
!Notes
!MP1
!MP2
|-
|-
|0x4
|u32
|u32
|1
|1
|'''Scratch Size'''
|'''Scratch Size'''
|Amount of memory that the animation system needs to allocate to process animation
|Amount of memory that the animation system needs to allocate to process animation
|{{check}}
|{{check}}
|-
|-
|0x8
|[[EVNT (File Format)|EVNT]]
|[[EVNT (File Format)|EVNT]]
|1
|1
|'''EVNT Ref'''
|'''EVNT Ref'''
|ID for this ANIM's [[EVNT (File Format)|EVNT]] resource, or 0xFFFFFFFF if no events triggered
|ID for this ANIM's [[EVNT (File Format)|EVNT]] resource, or 0xFFFFFFFF if no events triggered
|{{check}}
|{{nocheck}}
|-
|-
|0xC
|u32
|u32
|1
|1
|{{unknown|Unknown 1}}
|{{unknown|Unknown 1}}
|Always 0x1
|Always 0x1
|{{check}}
|{{nocheck}}
|-
|u16
|1
|{{unknown|Unknown 2}}
|
|{{nocheck}}
|{{check}}
|-
|-
|0x10
|float
|float
|1
|1
|'''Duration'''
|'''Duration'''
|Time in seconds that the animation plays for
|Time in seconds that the animation plays for
|{{check}}
|{{check}}
|-
|-
|0x14
|float
|float
|1
|1
|'''Interval'''
|'''Interval'''
|Time in seconds between frames (reciprocal of frame-rate, typically 30-fps)
|Time in seconds between frames (reciprocal of frame-rate, typically 30-fps)
|{{check}}
|{{check}}
|-
|-
|0x18
|u32
|u32
|1
|1
|'''Root Bone ID'''
|'''Root Bone ID'''
|ID of the root bone in this ANIM
|ID of the root bone in this ANIM
|{{check}}
|{{check}}
|-
|-
|0x1C
|u32
|u32
|1
|1
|{{unknown|Unknown 3}}
|{{unknown|Unknown 3}}
|Always 0x0
|Always 0x0
|{{check}}
|{{check}}
|-
|-
|0x20
|u32
|u32
|1
|1
|'''Rotation Divisor'''
|'''Rotation Divisor'''
|Rotation vectors are divided by this value before being applied
|Rotation vectors are divided by this value before being applied
|{{check}}
|{{check}}
|-
|-
|0x20
|float
|float
|1
|1
|'''Translation Multiplier'''
|'''Translation Multiplier'''
|Translation vectors are multiplied by this value before being applied
|Translation vectors are multiplied by this value before being applied
|{{check}}
|{{check}}
|-
|float
|1
|'''Scale Multiplier'''
|Scale vectors are multiplied by this value before being applied
|{{nocheck}}
|{{check}}
|-
|-
|0x24
|u32
|u32
|1
|1
|'''Bone Channel Count'''
|'''Bone Channel Count'''
|Count of bone channels present in ANIM
|Count of bone channels present in ANIM
|{{check}}
|{{check}}
|-
|-
|0x28
|4
|4
|u32
|u32
|{{unknown|Unknown 4}}
|{{unknown|Unknown 4}}
|Always 0x1
|Always 0x1
|{{check}}
|{{check}}
|-
|-
|0x2C
|u32
|u32
|1
|1
|'''Key Bitmap Length'''
|'''Key Bitmap Length'''
|Number of bits in ''Key Bitmap''
|Number of bits in ''Key Bitmap''
|{{check}}
|{{check}}
|-
|-
|0x30
|u32
|u32
|round_up(''Key Bitmap Length'' / 32)
|round_up(''Key Bitmap Length'' / 32)
|'''Key Bitmap'''
|'''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. If the bit is unset, the keys must be generated via interpolation.
|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. If the bit is unset, the keys must be generated via interpolation.
|{{check}}
|{{check}}
|-
|-
|{{unknown|}}
|u32
|u32
|1
|1
|'''Bone Channel Count'''
|'''Bone Channel Count'''
|Count of animated bone channels (matches the previous bone channel count)
|Count of animated bone channels (matches the previous bone channel count)
|{{check}}
|{{nocheck}}
|-
|-
|{{unknown|}}
|u32
|u32
|1
|1
|'''Bone Channel Descriptor Count'''
|'''Bone Channel Descriptor Count'''
|Count of bone channel descriptors in ''Bone Channel Descriptor Table''. Matches the ''Bone Channel Counts''.
|Count of bone channel descriptors in ''Bone Channel Descriptor Table''. Matches the ''Bone Channel Counts''.
|{{check}}
|{{check}}
|-
|-
|{{unknown|}}
|[[#Bone Channel Descriptor|Bone Channel Descriptor]]
|[[#Bone Channel Descriptor|Bone Channel Descriptor]]
|''Bone Channel Descriptor Count''
|''Bone Channel Descriptor Count''
|'''Bone Channel Descriptor Table'''
|'''Bone Channel Descriptor Table'''
|Table describing animated bone channels
|Table describing animated bone channels
|{{check}}
|{{check}}
|-
|-
|{{unknown|}}
|u32
|u32
|<remainder of file>
|<remainder of file>
|'''Key Bitstream'''
|'''Key Bitstream'''
|Word-packed bitstream laid out as described by the descriptor table. The bitstream is unpacked just like ''Key Bitmap'' (least-significant to most-significant).  
|Word-packed bitstream laid out as described by the descriptor table. The bitstream is unpacked just like ''Key Bitmap'' (least-significant to most-significant).  
Key values are tightly-packed, quantized integers whose bit-depth is specified by the ''q_*'' values in the descriptor table.  
Key values are tightly-packed, quantized integers whose bit-depth is specified by the ''* Bits'' values in the descriptor table.  
Each bone-channel key-set starts with a single bit providing the ''W sign-bit'' (1 for negative, 0 for positive).
Each bone-channel key-set starts with a single bit providing the ''W sign-bit'' (1 for negative, 0 for positive).


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|------------|------------|-----|------------|
|------------|------------|-----|------------|
</pre>
</pre>
|{{check}}
|{{check}}
|}
|}


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[[Category:File Formats]]
[[Category:File Formats]]
[[Category:Metroid Prime]]
[[Category:Metroid Prime]]
[[Category:Metroid Prime 2: Echoes]]
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