Difference between revisions of "Materials (Metroid Prime 3)"

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==== PASS ====
 
==== PASS ====
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The PASS sections set up a single rendering pass, consisting of one TEV stage and potential other data to go with it (like a UV animation). One pass is 32 bytes (without the animation) and is structured as follows:
  
 
{| class="wikitable"
 
{| class="wikitable"
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| u32
 
| u32
 
| 4
 
| 4
−
| '''UV animations size'''
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| '''UV Animation Size'''
−
| Needs verification; only bottom 8 bits are valid
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|
 
|}
 
|}
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 +
If there's a UV anim, it is structured like this:
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{| class="wikitable"
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! Offset
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! Type
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! Size
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! Description
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|-
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| 0x0
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| u16
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| 2
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| {{unknown|'''Unknown'''}}
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|-
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| 0x2
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| u16
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| 2
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| {{unknown|'''Unknown'''}}
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|-
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| 0x4
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| u32
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| 4
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|
  
 
List of possible PASS subtypes:
 
List of possible PASS subtypes:

Revision as of 17:08, 17 May 2015

The format for materials saw a dramatic overhaul in Metroid Prime 3. The format is seen in both the CMDL and MREA formats and is identical in both. This particular material format appears in Metroid Prime 3: Corruption and Donkey Kong Country Returns.


Morphball wirerender.png This file format needs more research
Need to find TEV values for each subsection type


Material Set Format

Materials come as part of a set; although most files will only have one set, some CMDLs will have more, as indicated by a count value in the header. The set format is merely a 32-bit count value followed by that number of materials.

Material Format

The material format starts with a 28-byte header, then after that is broken up into a bunch of subsections.

Header

Offset Type Size Description Notes
0x0 u32 4 Material size Does not include size value
0x4 u32 4 Material flags Only bottom 17 bits are valid
0x8 u32 4 Group index Denotes groups of materials that share the same settings, but different textures.
0xC u32 4 Unknown Value is possibly unused; the material loading code seems to skip it
0x10 u32 4 Vertex attribute flags Functionality is identical to Metroid Prime 2
0x14 u32 4 Unknown Value is possibly unused; the material loading code seems to skip it
0x18 u32 4 Unknown
0x1C u32 4 Unknown
0x20 End of header

Flags

Known flag values:

Bit Hex Description
0 0x1 Unknown
1 0x2 Unknown
2 0x4 Unknown
3 0x8 Unknown
4 0x10 Unknown
5 0x20 Enable additive blending (probably - needs verification)
6 0x40 Unknown
7 0x80 Unknown
8 0x100 Shadow occluder mesh; meshes using this material are not rendered, but can be used to cast dynamic shadows on actors
9 0x200 Unknown
10 0x400 Unknown
11 0x800 Unknown
12 0x1000 Unknown
13 0x2000 Unknown
14 0x4000 Unknown
15 0x8000 Unknown
16 0x10000 Unknown
17+ - Unused

Subsections

The rest of the material data is made up of a number of subsections. These subsections generally set different texture slots, as well as other parameters like Konst colors and material opacity. There's no count for the number of subsections; it needs to be read in using a while loop. The "END " section denotes the end of the material.

The order of the subsections doesn't matter. One material can only have one of each type of subsection; if there's any additional ones, they will overwrite the previous ones.

There are three subsection types (aside from END): PASS, CLR, and INT. Each of these types has a number of subtypes.

PASS

The PASS sections set up a single rendering pass, consisting of one TEV stage and potential other data to go with it (like a UV animation). One pass is 32 bytes (without the animation) and is structured as follows:

Offset Type Size Description Notes
0x0 u32 4 PASS subsection size
0x4 char[4] 4 Section subtype fourCC See below for possible subtypes
0x8 u32 4 Pass Flags Only bottom 5 bits are valid
0xC TXTR 8 Texture ID
0x14 u32 4 UV Source Only bottom 4 bits are valid
0x18 u32 4 UV Animation Size

If there's a UV anim, it is structured like this:

Offset Type Size Description
0x0 u16 2 Unknown
0x2 u16 2 Unknown
0x4 u32 4

List of possible PASS subtypes:

Type Description
DIFF Lightmap
BLOL Bloom lightmap
CLR Diffuse map
TRAN Greyscale opacity map
INCA Emissive map
RFLV Specular map
RFLD Reflection/sphere map
LRLD See RFLD
LURD See RFLV
BLOD See BLOL
BLOI See BLOL
XRAY Sphere map for X-Ray models; similar to RFLD
Flags

Known flag settings:

Bit Hex Description
0 0x1 Unknown
1 0x2 Unknown
2 0x4 Unknown
3 0x8 Unknown
4 0x10 On TRAN, indicates that the texture map is inverted (ie. white is transparent, black is opaque).
5+ - Unused

CLR

Offset Type Size Description Notes
0x0 char[4] 4 Section subtype fourCC See below for possible subtypes
0x4 u32 4 Color value 32-bit RGBA value

List of possible CLR subtypes:

Type Description
CLR Unknown
DIFB Lightmap multiplier color

INT

Offset Type Size Description Notes
0x0 char[4] 4 Section subtype fourCC See below for possible subtypes
0x4 u32 4 Value Actually an 8-bit value; the top 24 bits are ignored

List of possible INT subtypes:

Type Description
OPAC Sets the opacity of the entire material
BLOD
BLOI
BNIF
XRBR
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