Table 6.136 — DRM_Lobe_Data
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 a cone or a pyramid shape, termed the lobe of the light, of a light source or directional light in terms of direction vectors for the central axis of the light (LIGHT_DIRECTION), the VERTICAL_AXIS, and horizontal and vertical angular widths. Both reference vectors are specified relative to the SRF of the light source or directional light for which the <DRM Lobe Data> instance is a component. The component LIGHT_DIRECTION vector and VERTICAL_AXIS vector shall not be parallel. The horizontal_width field specifies the horizontal lobe width, in radians, measured perpendicular to the VERTICAL_AXIS <DRM Reference Vector> component. The vertical_width field specifies the vertical lobe width, in radians, measured parallel to the VERTICAL_AXIS <DRM Reference Vector> component. |
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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 |
1These two <DRM Reference Vector> components specify the lobe cross section axes. One <DRM Reference Vector> component specifies the central axis of the lobe with vector_type = LIGHT_DIRECTION. The other <DRM Reference Vector> component specifies the vertical axis direction with vector_type = VERTICAL_AXIS. |
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Example(s) |
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