Header: Size=114 Bytes

Ext. Header: Size= 40 Bytes

Feature Block: Size=48 Bytes

Header:

Every spell file contains a header. It contains the basic properties of the spell represented by the file.
 

Extended Header:

One Extended Header equals one ability of an Spell.
 

Feature Block:

A spells magical capabilities come from one or more feature blocks
Every Feature Block provides a specific effect.
 

Header:

FileType:
 

This field contains the type of data file. It should be the same as the file extension.
 

FileRevision:
 

Revision of the data file. In BG I've only found 'V1.x' files, but this may change with future expansions.
 

SpellNameReference:
 

This is the reference to the name of the spell.
The reference is the index of the name string contained in Dialog.tlk file.
 

School:
 

This field specifies the school the spell belongs to:
 

SpellLevel:
 

Contains the casting level of spell.
 

SpellBookIcon:
 

File name of the BAM file that contains the Spell Book Icon.
 

DescriptionReference:
 

This is the reference to the spell description.
The reference is the index of the name string contained in Dialog.tlk file.
 

ExtendedHeaderOffset:
 

Offset of the start of the first extended header found in the Spell file.

ExtendedHeaderCount:
 

Some spell files may actually contain more than one Extended Header..
 

FeatureTableOffset:
 

Offset of the first Feature Block.

Extended Header:

This field determines the type of Spell:
 

SpellBarIcon:
 

File name of the BAM file that contains the Spell Bar Icon.
 

CasterLevel:
 

Level at which caster must be for this Extended Header to apply.
 

CastingTime:
 

This field specifies the time it takes the user to cast the spell.
 

EffectCount:
 

Number of structs used for this extended header.

SpecialGraphic:
 

Special Graphic if "missle weapon".
 

Feature Block:

Feature:
 

TargetIdentifier:
 

TaregetIdentifier deetermines the target of this effect
 

Parameter 1:
 

Parameter 1 is a Parameter passed to the Feature/Effect function.
Most of the time it contains the modification value of a Feature/Effect.
 

Parameter 2:
 

Parameter 2 Is The Second Parameter passed to the Feature/Effect function.
Most of the time it contains the mode of Parameter 1(%, Absolute, Relative.....).
 

EffectTimeMode:
 

This field sets the timemode of the item and the EffectTimeField
 

EffectTime:
 

EffectTime contains a time value for the Effect.
Game time in Rounds = EffectTime / 60
 

Probability:
 

This field contains the probability of this Effect to happen. It's value can go from 0 to 100.
0 The Effect never happens, 100 The Effect always happens. Values greater than 100 are taken as 100.
 

FileName:
 

FileName is another Paremeter passed to the Effect/Feature function.
Some functions like make sound use it to specify the sound file played.
 

Throws:
 

This field only matters for dice based Effects.
 

DiceSides:
 

This field only matters for dice based Effects.
 

SavingThrowType:
 

This field determines the type of saving throw that must be made to avoid Effect.
 

SavingThrowBonus:
 

This field determines the bonus to the saving throw that must be made to avoid Effect.