Table 6.131 — DRM_Light_Rendering_Properties

Property

Description

Class
  • <DRM Light Rendering Properties>

Superclass

Subclass
  • None.

Definition

An instance of this DRM class indicates that the aggregating <DRM Geometry> is to be rendered so as to provide the illusion that the <DRM Geometry> emits light, but unlike an actual <DRM Light Source>, the <DRM Geometry> will not actually emit light (for example, shadows should not be generated).

Class diagram

Figure 6.153 — DRM_Light_Rendering_Properties

Inherited field elements

Field name

Range

Field data type

None

    

Field elements

Field name

Range

Field data type

display_type

 

Display_Type

light_diameter1

 

Long_Float

light_extinguishing_range2

 

Long_Float

random_area_light3

 

Boolean

active_light_value4

 

Boolean

candela_value5

 

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

Clarifications

1 This is the size of the light, in pixels. The default value, 0.0, means “not applicable.”

2 This is the distance, in metres, at which the light is no longer seen. The default value, 0.0, means that it is always seen.

3 This indicates whether all lights at this level and in the associated component tree were originally part of a random area light.

4 This is the default / active state of the light, where TRUE = on, and FALSE = off.

5 This is the candela value of the light at full intensity. The default value, 0, means that the source had no candela value.

Example(s)

  • Any <DRM Primitive Geometry> can take on light behaviour. An example might be a <DRM Point>, where the light point is visible to a certain extinguishing range (default = 0, i.e. the light is visible from any distance).