rmdl_notes.txt

Magic: RMDL
Version: 00 00 01 01
BOM: 7F 7F FF FF (x24)
Model Count: u32
Pointer to model pointers
Padding: 12 bytes
Pointer to matrix info

Model header:
Model ID?: u32
Pointer to display list
Vertex data attribute count: u32
Pointer to vertex data
MaterialData package entry
Unknown: u32 (Always 01D0E75D?)
Unknown: u32 (Always 0?)
Bounding box (Min XYZ, Max XYZ): f32[6]
Unknown: u32
Unknown: u32 (Always 0?)
Unknown: u32 (Always 2CA33BDB? "none" when passed through FNV-1)
Unknown (padding?): u32 * 3
Pointer to Bone to Matrix binding info
Pointer to Bone names
Pointer to Bone info

If there is bone info, GX_VA_POSMATIDX is enabled with 8-bit index

Vertex data header:
Vertex attribute data entries...

Vertex attribute data entry:
Vertex attribute array type: u8 (GX_VA_POS and friends)
Vertex attribute type: u8 ($ & 0b111 is component size, $ >> 3 is component type)
Padding? always zero: u16
Pointer to attribute data: u32

Bone to Matrix binding info:
Pointer to start of Bone to Matrix bindings
Pointer to identity 3x4 matrix for each binding
Number of matrix bindings: u32

Bone to Matrix Binding:
Weights: f32[4]
Bone index: u8[4] (FF == no bone)

Bone names:
Number of bones: u32
For each bone, the bone name (probably FNV-1 32-bit): u32

Bone info:
Number of bones: u32
Pointer to bone names: &[u32; num_bones]
Pointer to bone transform matrix data: &[[f32; 4 * 4]; num_bones]

Matrix info:
Pointer to matrix header

Matrix header:
Number of 4*4 matrix entries: u32
Pointer to unknown data
Pointer to start of matrix data (f32[4][4] * num matrix entries)

Pointers inside Pig:
00000034: 000043C0
00000060: 000000E0
00000068: 000020E0
000000AC: 00003D78
000000B0: 000043A0
000000B4: 000043C8