4 Data Structures
TQ3Tangent2D
and TQ3Tangent3D
data structures to represent two- and three-dimensional parametric surface tangents. A surface tangent indicates the directions of changing u, v, and w parameters on a surface.
typedef struct TQ3Tangent2D { TQ3Vector3D uTangent; TQ3Vector3D vTangent; } TQ3Tangent2D; typedef struct TQ3Tangent3D { TQ3Vector3D uTangent; TQ3Vector3D vTangent; TQ3Vector3D wTangent; } TQ3Tangent3D;uTangent
The tangent in the u direction.vTangent
The tangent in the v direction.wTangent
The tangent in the w direction.
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