Skin PLG (RW Section)

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RW Stream Section
Skin PLG
0x0116

Skin is an additional RenderWare plugin for geometry section. It is used to hold information about skinned model.

Structure

UINT8   numBones (numMatrices)
UINT8   numUsedBones
UINT8   maxWeightsPerVertex
UINT8   padding (unused)
UINT8   bonesUsed[numUsedBones]
UINT8   vertexBoneIndices[geometry->numVertices][4]
FLOAT   vertexBoneWeights[geometry->numVertices][4]
#repeat for numMatrices
    #if RwVer < 3.7.0.0 && maxWeightsPerVertex == 0
    INT32   unused 4b value, possibly a leftover from old RW versions (0xDEADDEAD)
    #endif
    FLOAT   skinToBoneMatrix[4][4]
#endrepeat
// Split data
UINT32  boneLimit
UINT32  numMeshes
UINT32  numRLE 
#if numMeshes > 0
UINT8   meshBoneRemapIndices[numBones]
UINT16  meshBoneRLECount[numMeshes]
UINT16  meshBoneRLE[numRLE]
#endif
numBones (numMatrices)
Number of bones attached to the skin, also the number of inverse matrices (see skinToBoneMatrices).
numUsedBones
Number of bones which influence vertices, that is those bones which have at least a non-zero weight. If this value is zero, RW will try to find "used" bones automatically.
maxWeightsPerVertex
Overall number of maximum non-zero weights per vertex. If zero, RW will find this value automatically.
bonesUsed
Indices list of the significant bones connected to the skin (see numUsedBones).
vertexBoneIndices
Vertex bone indices are represented with 4 bone indices per each vertex.
vertexBoneWeights
Vertex bone weights are represented with RwMatrixWeights structure per each vertex. RW docs says it's necessary to keep the order within 4 weight values (from higher to lower), but even some example models have different ordering.
skinToBoneMatrices
These are inverse matrices represented with RwMatrix structure.
boneLimit
numMeshes
numRLE
meshBoneRemapIndices
meshBoneRLECount
meshBoneRLE