Sims 3:0x02019972

Tutorials:TS3 Advanced Coding Tutorials -> Sims 3:PackedFileTypes
Tutorials:TS3 Advanced Coding Tutorials -> Sims 3:RCOL

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Description

This is a Sims 3:RCOL chunk.

The purpose of the MTST 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.

Format

DWORD 'MTST'
DWORD Version
DWORD		// unknown
DWORD Initial MATD index | 0x10000000
DWORD Count
--count repeats of
	DWORD	MATD index | 0x10000000
	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) | 0x10000000
DWORD 0x2EA8FB98 // FNV32 hash of "Default"

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Tutorials:TS3 Advanced Coding Tutorials -> Sims 3:PackedFileTypes
Tutorials:TS3 Advanced Coding Tutorials -> Sims 3:RCOL