EFF file format
Applies to:
BG1: TotS, BG2, BG2: ToB, IWD, IWD:HoW, IWD:TotL, PST, BGEE
General Description
This file format describes an effect (opcode) and its parameters. The format is only ever found embedded in other files (e.g. ITM or SPL). The engine appears to roll a probability for each valid target type, rather than one probability per attack.
| Offset | Size (datatype) | Description |
|---|---|---|
| 0x0000 | 2 (word) | Effect type |
| 0x0002 | 1 (byte) | Target type
|
| 0x0003 | 1 (byte) | Power |
| 0x0004 | 4 (dword) | Parameter 1 |
| 0x0008 | 4 (dword) | Parameter 2 |
| 0x000c | 1 (byte) | Timing Mode |
| 0x000d | 1 (byte) | Dispel/Resistance |
| 0x000e | 4 (dword) | Duration |
| 0x0012 | 1 (byte) | Probability 1 |
| 0x0013 | 1 (byte) | Probability 2 Note: The BG1 engine treats probability as a single word, effects are applied in the range 0-probability. |
| 0x0014 | 8 (resref) | Resref key |
| 0x001c | 4 (dword) | Dice count |
| 0x0020 | 4 (dword) | Dice sides |
| 0x0024 | 4 (dword) | Saving throw type |
| 0x0028 | 4 (dword) | Saving throw bonus |