Table 6.156—DRM_Light_Rendering_Properties

Property

Description

Superclass

·         <DRM SEDRIS Abstract Base>

Class

·         <DRM Light Rendering Properties>

Subclass

·         none

Definition

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).

Example(s)

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

Inherited field elements

field_name

range

Field_Data_Type

none

 

 

Field elements

field_name

range

Field_Data_Type

display_type1

 

Display_Type

light_diameter2

≥ 0,0

Long_Float

light_extinguishing_range3

≥ 0,0

Long_Float

random_area_light4

 

Boolean

active_light_value5

 

Boolean

candela_value6

≥ 0,0

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)

·         zero or more <DRM Light Rendering Behaviour>s

·         zero or one <DRM Light Rendering Properties Control Link>

Composed of (two-way metadata) (inherited)

·         none

Composed of (two-way metadata)

·         none

Component of (two-way) (inherited)

·         none

Component of (two-way)

·         zero or more <DRM Aggregate Geometry>s

·         zero or more <DRM Attribute Set>s

·         zero or more <DRM Primitive Geometry>s

Constraints

·         Homogeneous Light_Rendering_Properties

Notes

1 Indicates whether light is raster or calligraphic.

2 This value is the size in pixels. The default value is 0, which means "not applicable."

3 This range is the distance (in meters) at which the light is no longer seen. The default is 0, which means it is always seen.

4 This flag indicates (if TRUE) that all lights at this level or below were originally part of a random area light.

5 A value of TRUE indicates the light is on while a value of FALSE indicates the light is off. This is the default/active state of the light.

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

Class diagram

<DRM Light Rendering Properties>