Table 6.138 — DRM_Lobe_Data

Property

Description

Class
  • <DRM Lobe Data>

Superclass

Subclass
  • None.

Definition

An instance of this DRM class specifies a cone or a pyramid shape of a light source or directional light in terms of direction vectors for the central axis (LIGHT_DIRECTION), the VERTICAL_AXIS, and horizontal and vertical angular widths.

The horizontal_width field specifies the horizontal lobe width, measured in radians perpendicular to the VERTICAL_AXIS <DRM Reference Vector> component.

The vertical_width field specifies the vertical lobe width, measured in radians measured parallel to the VERTICAL_AXIS <DRM Reference Vector> component.

Clarifications

1 These are the lobe cross section axes. One component <DRM Reference Vector> specifies the lobe axis direction with vector_type = LIGHT_DIRECTION. The other component <DRM Reference Vector> specifies the vertical axis direction with vector_type = VERTICAL_AXIS.

Class diagram

Figure 6.159 — DRM_Lobe_Data

Inherited field elements

Field name

Range

Field data type

None

    

Field elements

Field name

Range

Field data type

horizontal_width

[0,0..two_pi]

Long_Float

vertical_width

[0,0..two_pi]

Long_Float

Associated to (one-way) (inherited)
  • None.

Associated to (one-way)
  • None.

Associated by (one-way) (inherited)
  • None.

Associated by (one-way)
  • None.

Associated with (two-way) (inherited)
  • None.

Associated with (two-way)
  • None.

Composed of (two-way) (inherited)
  • None.

Composed of (two-way)

Composed of (two-way metadata) (inherited)
  • None.

Composed of (two-way metadata)
  • None.

Component of (two-way) (inherited)
  • None.

Component of (two-way)

Constraints

Example(s)

See examples in: <DRM Spot Light>, <DRM Blend Directional Light>, <DRM Cone Directional Light>, and <DRM Pyramid Directional Light>.