Skate guidance edges

AnvilGameplay dataApplies toSWS

Every grindable edge of Shaun White Skateboarding is data on an entity: a guidance component holds the edges, their surface type and the links that join them. Four component classes share one layout; they differ in what an edge is used for. Observed

Class	Id	Role	Level 01
`SWSkateGuidanceSystem`	`0x5CDCA222`	Rails, ledges and copings	6,118 edges on its components
`SWSkateFreeFormGuidanceSystem`	`0x359BE54E`	Free-form grind edges	95
`Scale`	`0x6A1CFF2F`	Shapeable props (kickers, benches, planters)	25
`Morph`	`0x081AF61A`	Props that change between stored states	5

The class ids equal the CRC-32 of the class names. Proven · computed from the names

Guidance system component

SWSkateGuidanceSystem componentvariableSWS100% known

Little-endian. The 78-byte object records are exact and their lengths agree with the geometry on all 6,118 level-01 edges.

ProvenObservedSourcedInferredUnknownNot described

Offset	Size	Type	Field	Confidence	Notes
0x0	4	u32 = 0x5CDCA222	class	Proven
0x4	4	u32	id	Observed	the resource reference id
0x8	4	u32	reference class	Observed
0xC	1	u8	kind	Observed	0xFE on scale components; meaning unknown
0xD	4	u32	object count n	Observed
0x11	78n	GuidanceObject[n]	objects	Observed	78 bytes each, below

Guidance object78 bytesSWS100% known

Little-endian.

ProvenObservedSourcedInferredUnknownNot described

Offset	Size	Type	Field	Confidence	Notes
0x0	4	u32 = 0	zero	Observed
0x4	4	u32 = 0x344FA659	class	Observed
0x8	1	u8	Valid	Observed
0x9	4	u32	SubType	Observed	0 none, 9 curved vert; the enum names stand last-first in the executable
0xD	4	u32	Index0	Observed	index of the edge's first point
0x11	4	u32	Index1	Observed	index of the edge's second point
0x15	16	f32[4]	first face normal	Observed	three floats and a zero word
0x25	16	f32[4]	second face normal	Observed	three floats and a zero word
0x35	25	inline object	SWSkateGuidanceObjectData	Observed	[00][id u32][class 0x98A53374][u32 0][end link u32][start link u32][length f32]

An edge joins the points Index0 and Index1 of the component’s point list. The links name the neighbouring edges; the value 0x1FFF means none. An end link joins an edge that holds Index1; in 8% of the links the connection runs the other way. Observed · level 01

The points follow the objects as a u32 count of u16 values and then u16 triples, each coordinate (v − 32767) / 200 metres in the entity’s local frame. Over all 6,118 edges of level 01 the world length of the decoded points equals the stored length to within 2 cm. Observed · level 01

The two face normals give the kind of edge: a ledge has one normal up and one level; a rail has both tilted by 25 to 60 degrees (fences, stair rails, clothes lines); a curved vert, the lip of a vert wall or quarter pipe, has SubType 9. Observed · level 01

Shaping components

The four classes share the layout up to the partitioner: a resource reference, the guidance objects, a u16 point list, an edge filter and a partitioner. The edge filter is an inline object ([00][id][0xDF7FF220], 27 bytes: the floats 1/√2, π/8 and π/4, a zero u16, the words 46 and 60, the float 0.2 and a zero byte). The partitioner ([00][id][0x4661AAEF]) stores a root index, an array of leaf indices, a minimum and a maximum corner and an array of nodes ([00 00 00 00][0x5374195C], a type u32, two u16 and a float for the middle). For free-form and scale components its box equals the bounds of the points to within one u16 step; for morph components it covers the morph states as well. Observed · level 01

Of the class-hash hits in level 01, 95, 25 and 5 are real free-form, scale and morph components (the other hits are entries of an entity’s component list). Observed

A free-form component (named 00_ShP_FFGrind5m_NNN) has one 5 m edge from (0, 0, 0) to (0, 5, 0), then a u32 id of a shared object of class 0xB5403F20 (131 bytes with one edge of 0.25 m and two floats). Level 01 uses the object 0x901687FC for all of them; levels 02 to 05 also use 0x766A4B87 and 0x7CD6EC02 with the same content. Observed
A scale component stores nothing after the partitioner, and its reference kind is 0xFE. Observed
A morph component has a u32 state count (2 in level 01, up to 7 in level 06) and per state an inline object (0xCB13AC37) with a guidance object array and a point list of the same length as the system’s. State 0 is the system’s own objects and points (largest point difference 0.0041 to 0.005, one u16 step, on 5 of 5). On the wave prop 01_B_Inf_WaveFlat all 220 points lie on vertices of the mesh within 8e-6, and state 1’s points lie on the vertices of the mesh’s second vertex stream within 8e-6 with the same 2 cm deltas on 220 of 220. The largest point movement of a state equals the morph target’s (1.6 m for the wave, 3.2 m for the park shapes). Observed

Levels 02 to 06 contain 109, 106, 50, 62 and 11 free-form components, 32, 19, 19, 0 and 2 scale components and 1, 10, 11, 1 and 1 morph components. A plain guidance system in level 05 holds a link that names an edge which does not hold the point it should; it is read as no link. Observed