Entities and groups

An Entity combines placement, components, bounds, layer actions and optional reset data. EntityGroup adds a member list to that same prefix. The structural census reads all 615,110 Entity and 56,837 EntityGroup records when bodies without length rules are retained between recognized headers. This measures framing coverage, not complete component interpretation. Observed

The common prefix is 01 03. In 830 bodies, 01 00 introduces an inline Hierarchy (u64 + type 0x788BAA0D + 64 bytes) and HierarchyHandle (u64 + type 0x709FB9D4 + u32 + 9 bytes) before the matrix. Observed

Entity body with null HierarchyvarRR100% known

Little-endian. Mechanical framing is proven on the strict six-archive profile: 585,234 Entity bodies consumed exactly, 29,876 refused; 38,825 EntityGroup bodies consumed exactly, 18,012 refused. Metadata-derived meanings and newer link variants retain their separate confidence.

ProvenObservedSourcedInferredUnknownNot described

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

0x0

tagu8 = 01

tagu8 = 03

placementmatrix4

…

⋮ placement: 64 bytes

0x40

… placement

component count nu32

0x46

componentsbytes

70+C

runbytes

113+C

FakeCellIndexu32

117+C

Scalef32

121+C

boundsbytes

161+C

EntityDescriptor idu64 = 0

169+C

EntityDescriptor typeu32 = 0x60121A9E

173+C

DescriptorTypeu32

177+C

SubDescriptorTypeu32

181+C

NetworkTypeu32

185+C

IsPickableByPlayeru8

186+C

DataLayerFilter idu64 = 0

194+C

DataLayerFilter typeu32 = 0xDB1D406E

198+C

action count ku32

202+C

DataLayerActionsbytes

202+C+25k

UIVisualsDisplayOrder link count Mu32

206+C+25k

tailbytes

Offset	Size	Type	Field	Confidence	Notes
0x0	1	u8 = 01	tag	Proven
0x1	1	u8 = 03	tag	Proven
0x2	64	matrix4	placement	Observed	column-major; translation at 50..61; last row 0 0 0 1
0x42	4	u32	component count n	Proven
0x46	C	bytes	components	Proven	n × the Component box, in order
70+C	43	bytes	run	Proven	the Run box
113+C	4	u32	FakeCellIndex	Observed	Entity.FakeCellIndex (registry u32): 0xFFFFFFFF on 18,913 of 21,000, a cell index on 2,087
117+C	4	f32	Scale	Observed	uniform (registry Scale)
121+C	40	bytes	bounds	Observed	BoundingVolume, relative to the translation
161+C	8	u64 = 0	EntityDescriptor id	Proven
169+C	4	u32 = 0x60121A9E	EntityDescriptor type	Proven
173+C	4	u32	DescriptorType	Observed	EntityDescriptor.DescriptorType (enum, table not found): 0 on 20,995 of 21,000 sampled, 1 on 3, 3 on 1
177+C	4	u32	SubDescriptorType	Observed	EntityDescriptor.SubDescriptorType (u32): 0 on 20,999, 3 on 1
181+C	4	u32	NetworkType	Observed	EntityDescriptor.NetworkType (enum, table not found): 0 on 15,214, 1 on 5,781, 2 on 1
185+C	1	u8	IsPickableByPlayer	Observed	EntityDescriptor.IsPickableByPlayer (bool): 0 on all sampled
186+C	8	u64 = 0	DataLayerFilter id	Proven
194+C	4	u32 = 0xDB1D406E	DataLayerFilter type	Proven
198+C	4	u32	action count k	Proven
202+C	25·k	bytes	DataLayerActions	Proven	the DataLayerAction box: the event or season layers it belongs to
202+C+25k	4	u32	UIVisualsDisplayOrder link count M	Observed	M nine-byte links follow; offsets below assume M = 0.
206+C+25k	var	bytes	tail	Observed	ResetData pointer: 03 null, or inline GameStateData.

The count after DataLayer actions counts links: tag 00 or 01 plus u64. Nonzero counts shift ResetData beyond the zero-link offsets above. Observed

Component (×n)13 + body bytesRR100% known

Little-endian. Mechanical framing is proven on the strict six-archive profile: 585,234 Entity bodies consumed exactly, 29,876 refused; 38,825 EntityGroup bodies consumed exactly, 18,012 refused. Metadata-derived meanings and newer link variants retain their separate confidence.

ProvenObservedSourcedInferredUnknownNot described

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

0x0

tagu8 = 04 or 00

idu64

typeu32

0xD

bodybytes

Offset	Size	Type	Field	Confidence	Notes
0x0	1	u8 = 04 or 00	tag	Proven
0x1	8	u64	id	Proven
0x9	4	u32	type	Proven
0xD	var	bytes	body	Proven	Type-specific grammar; no universal stored component length.

Component headers normally use 04, with 00 on some UI and embedded objects. The registry identifies 291 Component-derived classes. Ids need not be consecutive and can use high-bit encodings; proximity to the Entity id is not a valid boundary rule. Component ids are 41-bit numbers, a few stored as bit63 | number << 20 | small index, and ids within one Entity differ by up to about 1.8e12. Because 00-tagged embedded objects inside payloads look like headers, counts and the first component’s tag are needed to tell them apart. Observed

135 component types comprising 105,315 instances remain opaque in the full structural census. Header-delimited coverage does not establish a sequential length rule for them. Observed

EntityGroup bodyvariableRR

Little-endian. Mechanical framing is proven on the strict six-archive profile: 585,234 Entity bodies consumed exactly, 29,876 refused; 38,825 EntityGroup bodies consumed exactly, 18,012 refused. Metadata-derived meanings and newer link variants retain their separate confidence.

ProvenObservedSourcedInferredUnknownNot described

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

0x0

Entity prefixbytes

E

member count Cu32

E+4

membersreferences

E+4+10C

link count Mu32

E+8+10C

member linkslinks

E+8+10C+9M

GroupOptimizationStateu32

Offset	Size	Type	Field	Confidence	Notes
0x0	E	bytes	Entity prefix	Proven
E	4	u32	member count C	Proven
E+4	10C	references	members	Proven
E+4+10C	4	u32	link count M	Observed
E+8+10C	9M	links	member links	Observed
E+8+10C+9M	4	u32	GroupOptimizationState	Observed	0 NotOptimized, 1 OptimizedAndEditable, 2 OptimizedAndSealed.

In the USNAT group census, 16,743 groups own Visuals; 1,485 groups list 3,847 members. Members also occur in checked cell listings, so membership alone does not establish another placement or a parent transform. A second counted link list can follow the members before the final group-optimization word; the early zero-link formula 12 + 10 × members is not universal. Observed

See visual instances, flags, component grammars and DataLayers.

What do opaque and nested components contribute?

Retaining their bytes does not establish their behavior. An embedded Entity header alone does not prove an independently rendered placement. Unknown

The strict sequential profile consumes exactly 585,234 Entity and 38,825 EntityGroup bodies from the complete six-archive census, refusing 29,876 and 18,012 respectively. That proves the accepted framing only. The later header-delimited opaque-body census above does not establish those missing component grammars. Proven · accepted strict profile

Shaun White Skateboarding

only in SWS

A level cell holds Entity objects that carry a world matrix, a list of components and a bounding volume. The layout has no layer actions and no 64-bit ids; it follows the Assassin’s Creed II generation. Inferred · from the AC2-profile reader fitting its data

Shaun White Entity bodyvariableSWS100% known

Little-endian. Sequential decoding reaches the last byte for 3,316 of 6,861 entities of level 01 and 15,889 of 31,577 in all forges; the flag bytes through the tail verify on 6,758 of level 01.

ProvenObservedSourcedInferredUnknownNot described

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

0x0

managedu8

idu32

classu32 = 0x0984415E

GlobalMatrixf32[16]

…

⋮ GlobalMatrix: 64 bytes

0x40

… GlobalMatrix

0x49

Hierarchypointer

73+h

Componentsu32 + objects

var

flag bytesu8[34]

var

boundsBoundingVolume

var

EntityDescriptorbytes

var

null pointersu8[2] = 03 03

var

ResetDataGameStateData

var

tailbytes

Offset	Size	Type	Field	Confidence	Notes
0x0	1	u8	managed	Observed
0x1	4	u32	id	Observed
0x5	4	u32 = 0x0984415E	class	Proven	CRC-32 of Entity
0x9	64	f32[16]	GlobalMatrix	Observed
0x49	var	pointer	Hierarchy	Observed	null (tag 3) on 6,857 of the 6,861 entities of level 01, inline on 4
73+h	var	u32 + objects	Components	Observed	count, then for each a pointer tag 0 and the inline object
var	34	u8[34]	flag bytes	Unknown	named only by position
var	var	BoundingVolume	bounds	Observed	Min v3, Max v3, enum; world axes, relative to the origin
var	12	bytes	EntityDescriptor	Unknown
var	2	u8[2] = 03 03	null pointers	Observed
var	var	GameStateData	ResetData	Observed	u32, then two byte arrays
var	16	bytes	tail	Unknown

The matrix is applied as world = v_local * M, with the 16 f32 of M stored as rows 0 to 2 for the local X, Y and Z axes in world space and row 3 for the origin. Z is up. For 178 entities turned 90 degrees, the entity’s bounding volume equals the box of its mesh bounds transformed this way to within 0.5 m, where the transposed reading fits none. Observed · 178 rotated entities of level 01

The translations of the entities of one cell cluster in 32 m squares. Observed

Coverage is partial: components of classes with no known layout stop sequential decoding of the other 3,545 entities of level 01. The classes that stop the most are 0x5CDCA222 (661 entities; the skate guidance system), 0xE7E3A114 (524), 0x0873AE87 (300), 0x19D48AF6 (255) and 0xA0933257 (246). Observed · level 01

Which components remain without a layout?

Components of the classes 0xE7E3A114, 0x0873AE87, 0x19D48AF6, 0xA0933257, 0x089D59CA, 0x734E7ADA and 0x51734E21, and classes such as Scene, Trajectory and TriggerComponent, do not decode field by field. The 34 flag bytes, the 12-byte descriptor and the 16-byte tail of the Entity are not interpreted. Unknown