ScrapHacks/file_formats/chunked.md

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# General Block format
```cpp
struct Block {
unsigned char block_id[4],
uint32_t size,
unsigned char data[size],
}
template<typename T>
struct Block {
unsigned char block_id[4],
uint32_t size,
T data,
}
```
# Block IDs
| File Extension | Description |
|----------------|--------------------------|
| .cm3 | Animation file |
| .sm3 | 3d model file |
| .dum | Dummy (map object) file |
| .pth | AI Path |
| .emi | Emission maps/Materials? |
| .amc | Collision Data |
| File ID | Chunk IDs |
|---------|--------------------------------------------------------------------------|
| AMC | AMC, CMSH, QUAD |
| CM3 | ANI, CM3, EVA, NAE, NAM, SCN |
| DUM | DUM, INI |
| EMI | EMI, LFVF, MAP, MAT, TRI |
| SM3 | ANI, CAM, INI, LFVF, LUZ, MAP, MAT, MD3D, NAE, NAM, PORT, SCN, SM3, SUEL |
| Chunk ID | Description |
|----------|-----------------------------|
| ANI | Animation data? |
| AMC | Collision Data |
2020-08-04 16:08:34 +00:00
| CMSH | Collision Mesh Data |
| INI | INI-Configuration data |
| LUZ | Lighting information |
| MAT | Material information |
| QUAD | Mesh data? |
| SCN | Scene data? |
| CAM | Camera info? |
| PORT | Light portals? |
| SUEL | Ground plane? |
| DUM | Dummy (map object) data |
| MAP | UV Map? |
| LFVF | FVF Vertex Data |
| TRI | Triangle strip definitions? |
| NAM,NAE | Animation Data? |
# Format of Specific chunks
## INI
Configuration Data
```cpp
struct INI {
uint32_t num_sections,
struct {
uint32_t num_lines,
struct {
uint32_t num_chars,
char line[num_chars]
} lines[num_lines],
} sections[num_sections]
}
```
## LFVF
DirectX Flexible Vertex Format Data
```cpp
struct Vertex { // fields according to flags
float position[3],
float rhw,
float weights[3],
float normal[3],
float point_size,
uint32_t diffuse, //RGBA
uint32_t specular, //RGBA
float tex_coords[1 to 4][8] // ??? decided by flags?
}
struct LFVF {
uint32_t unk,
uint32_t num_entries,
struct {
uint32_t FVF, // FVF vertex data configuration
uint32_t vert_size //?,
uint32_t num_verts,
Vertex vertices[num_vers]
} entry[num_entries]
}
```
## DUM
Map object data
```cpp
struct DUM {
uint32_t unk_1,
uint32_t num_dummies,
uint32_t unk_2,
struct {
uint32_t name_length,
char name[name_length],
float position[3],
float rotation[3],
uint32_t has_ini,
if (has_ini) {
Block<INI> ini
},
uint32_t unk_1 // has_next?
} sections[num_sections]
}
```