Function: decodeUvTransform()

decodeUvTransform(array?): NTCMatrix3Like

The per-material UV transform every .ntc model carries: a 2D affine map from mesh/query UV into the local space the trained feature grids + MLP were actually fit against (see NTCNodeMaterial.js's query-time coord build, and training/NTCTextureSource.js's inverse-transformed bake). Stored/serialized as 6 numbers - the affine part of a THREE.Matrix3 ([a, b, c, d, e, f] such that local.x = a*u + b*v + c, local.y = d*u + e*v + f; the matrix's third row is always the implicit [0, 0, 1]) rather than the full 9-element Matrix3, since a UV transform can never carry a projective (non-affine) third row - see encodeUvTransform/ decodeUvTransform below. Defaults to identity - a material with no detected/explicit UV transform behaves exactly as before this field existed.

Parameters

array?

number[] | null

Returns

NTCMatrix3Like