Surface Tangents

Labels

ASCII

SurfaceTangent

Binary

srtn ( = 0x7372746E )

Data Format

Vector3D            paramU
Vector3D            paramV


paramU

The tangent in the u parametric direction.

paramV

The tangent in the v parametric direction.

Data Size

24

Description

A surface tangent object is used to specify three-dimensional tangents to the surface of a geometric object. These tangents serve to indicate the direction of increasing u and v in the surface parameterization of that object.

Parent Hierarchy

Element, attribute.

Parent Objects

Attribute set. A surface tangent always has a parent object.

Child Objects

None.

Example

Container (
    AttributeSet ( )
    SurfaceUV ( 0 0 )
    SurfaceTangent (
        1 0 0
        0 1 0
    )
)