3D Graphics Programming with QuickDraw 3D 1.5.4

Lines

Figure 4 shows a line.

Figure 4 A line

Labels

ASCII: Line
Binary: line ( = 0x6C696E65 )

Data Format



 
Point3D             start

Point3D             end

start: One endpoint of the line.
end: The other endpoint of the line.

Data Size

Description

A line is a straight segment in three-dimensional space defined by its two endpoints. Attributes may be assigned to the vertices of a line and to the entire line.

Default Surface Parameterization

The default surface parameterization for a line is (0, 0) at start and (1, 0) at end .

Parent Hierarchy

Shared, shape, geometry.

Parent Objects

None.

Child Objects

Attribute set (optional), vertex attribute set list (optional). An attribute set may be used to assign attributes to the entire line. The vertex attribute set list may include attribute sets for one or both vertices of the line. For the purpose of attribute assignment, the start and end vertices of a line are indexed by the integers 0 and 1 respectively. See "Vertex Attribute Set Lists" for a description of these lists.

EXAMPLE



 
Container (

    Line (

        0 0 0

        1 0 0

    )

    Container (

        VertexAttributeSetList ( 2 Exclude 0 )

        Container ( 

            AttributeSet ( )

            DiffuseColor ( 1 0 0 )

        )

        Container ( 

            AttributeSet ( )

            DiffuseColor ( 0 0 1 )

        )

    )

)

Default Size

None.