Pat0 / Color Patch¶
Applies to: GT4 · Extension: .pat / none · Endian: Little
Color Patches are responsible for holding a car model's data for each paint color. More precisely - these files contain data patches that will change bytes for a car model's model set structure, for instance, its texture set when switching to one car paint to another.
As model sets are fully loaded in memory as the actual runtime buffers, patching a model set's texture bytes on the fly is what allows seamless color switching in car/paint selections. It is a smart way of doing color transitions, but remains complicated to construct - texture buffers especially inside car models can be swizzled.
Tip
Presumably the way these were built were by diffing texture sets or whole model sets. Comparison between a paint and another is converted into patches - this file.
Header¶
The header may be present in all sorts of files like models.
Size: 0x20
| Field | Offset | Type | Description |
|---|---|---|---|
Pat0 |
0x00 |
int |
Magic, (not enforced) |
| Relocation Pointer | 0x04 |
int |
Relocation Pointer |
| Emptu | 0x08 |
byte[0x08] |
Empty/Not used |
| Paint/Variation Count | 0x10 |
short |
Number of paints for the target car model |
| Patch Count | 0x12 |
short |
Number of patches to be made per paint |
| Empty | 0x14 |
byte[0x0C] |
Empty/ Not used |
| Patch List | 0x20... |
Patch* |
Patch Offsets |
Patch¶
| Field | Offset | Type | Description |
|---|---|---|---|
| Patch Target Offset | 0x00 |
int |
Offset within the Model Set to patch |
| Patch Size | 0x04 |
int |
Size of the patch |
| Buffer Width | 0x08 |
byte[...] |
Patch data |