BTP (File Format)
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BTP (Binary Texture Pattern) is a texture pattern animation file format part of JSystem.
File Format
Header
A file starts with the following structure:
| Offset | Type | Description |
|---|---|---|
| 0x00 | Char[4] | File library magic. Always J3D1 in ASCII. |
| 0x04 | Char[4] | File type magic. Always btp1 in ASCII. |
| 0x08 | UInt32 | Size of file in bytes. |
| 0x0C | UInt32 | Number of sections stored in the file. |
After comes 0x10 bytes filled with 0x10. This is data used for a SVR block, but the magic has never been written.
TPT
| Offset | Type | Description |
|---|---|---|
| 0x00 | Char[4] | Section magic. Always TPT1 in ASCII. |
| 0x04 | UInt32 | Section size. |
| 0x08 | Byte | Loop mode. |
| 0x09 | Byte | Unknown. |
| 0x0A | UInt16 | Number of frames. |
| 0x0C | UInt16 | Number of texture pattern. |
| 0x0E | UInt16 | Number of global texture IDs. |
| 0x10 | UInt32 | Texture pattern array offset. |
| 0x14 | UInt32 | Global texture ID array offset. Points to an array of UInt16s, which represents texture indices in a BMD file. |
| 0x18 | UInt32 | Material ID array offset. Points to an array of UInt16s, which represents material indices in a BMD file. |
| 0x1C | UInt32 | String table offset. |
Texture Pattern
| Type | Offset | Description |
|---|---|---|
| 0x00 | UInt16 | Number of frames stored for this animation. |
| 0x02 | UInt16 | Index of the first texture ID to use from the global texture ID array. |
| 0x04 | Byte | Map target ID. |
| 0x05 | Byte[3] | Padding. |
Tools
The following tools can handle BTP files:
- (none)
