Difference between revisions of "Sims 3:0x02019972"

Latest revision as of 22:33, 31 July 2011

[edit] Overview

This is a Sims 3:RCOL chunk.

The purpose of the MTST (Material Set) is to allow multiple material definitions to be swapped by the game through the function:

ScriptCore.World.ObjectSetMaterial(ObjectGuid objId, string materialSetName, float transitionTime, bool bTransitionToOverlay);

For most objects, this function is often accessed through the function:

Sims3.Gameplay.Abstracts.GameObject.SetMaterial(string materialSetName);

The string argument is FNV32 hashed and matched with the hash name to locate and swap out the object's material.

[edit] Format

DWORD 'MTST'
DWORD Version
DWORD FNV32 of MATD Name
DWORD Initial MATD index
DWORD Count
--Count repeats of
	DWORD MATD index
	DWORD FNV32 of MATD Name

Based on all MTST blocks so far seen, 'Count' is >= 1 and there is an entry named "Default", i.e.

DWORD MATD index       // == Initial MATD index
DWORD 0x2EA8FB98       // FNV32 of "default"
DWORD 0xEEAB4327       // FNV32 of "dirty"
DWORD 0x2E5DF9BB       // FNV32 of "verydirty"
DWORD 0xC3867C32       // FNV32 of "burnt"
DWORD 0x257FB026       // FNV32 of "clogged"  

Where the MTST is a MODL block, index is or-d with 0x10000000 and refers to the MODL resource RCOL block number. Where it is a MTST resource, index is or-d with 0x30000000 (not sure what it indexes into, if anything).