Table 6.127 — DRM_Light_Rendering_Properties
Property |
Description |
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Class |
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Superclass |
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Subclass |
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Definition |
An instance of this DRM class specifies that the aggregating <DRM Geometry Representation> instance is to be rendered so as to provide the illusion that the <DRM Geometry Representation> instance emits light, but unlike an actual <DRM Light Source> instance, the <DRM Geometry Representation> instance will not actually emit light. The display_type field specifies whether the light is raster or calligraphic. The light_diameter field specifies the size of the light, in pixels. The default value, 0,0, means “not applicable.” The light_extinguishing_range field specifies the distance, in metres, at which the light is no longer seen. The default value, 0,0, means that it is always seen. The random_area_light field specifies whether all lights at this level and in the associated component tree were originally part of an area with randomly generated lights. The active_light_value field specifies the active state of the light, where TRUE = on, and FALSE = off. For a <DRM Light Rendering Properties> instance with a <DRM Light Rendering Properties Control Link> component X, where the active_expression_index field of X is non-zero, the value of the active_light_value field is obtained from X. The candela_value field specifies the candela value of the light at full intensity. The default value, 0,0, means that the source had no candela value. For a <DRM Light Rendering Properties> instance with a <DRM Light Rendering Properties Control Link> component X, where the candela_value_expression_index field of X is non-zero, the value of the candela_value field is obtained from X. |
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Class diagram |
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Inherited field elements |
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Field elements |
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Default field values |
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Associated to (one-way) (inherited) |
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Associated to (one-way) |
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Associated by (one-way) (inherited) |
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Associated by (one-way) |
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Associated with (two-way) (inherited) |
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Associated with (two-way) |
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Composed of (two-way) (inherited) |
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Composed of (two-way) |
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Composed of (two-way metadata) (inherited) |
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Composed of (two-way metadata) |
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Component of (two-way) (inherited) |
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Component of (two-way) |
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Constraints |
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Clarifications |
1If a <DRM Light Rendering Properties> instance is subject to dynamic control (that is, if it can be turned on and off or the candela value of the light can vary) it has a <DRM Light Rendering Properties Control Link> component to express that control mechanism. |
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Example(s) |
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