ISO 10303-214:2010(E)
A Light_source is a luminous source that affects the display of surfaces within a defined Model_image.
The position of the Light_source, if specified, is defined in the coordinate space of the presented model.
The data associated with a Light_source are the following:
The colour specifies the colour of a light source that is defined by the intensities of red, green, and blue proportions. The colour is either user-defined or pre-defined. Figure 23 shows the pre-defined colours.
The colour need not be specified for a particular Light_source.
The is_defined_for specifies the set of Model_image objects that the Light_source is applied to.
See light_source to model_image for the application assertion.
The light_type specifies the kind of Light_source.
NOTE Position and attenuation as well as additional characteristics of the Light_source are specified dependent on the kind of Light_source.
EXAMPLE 'directional', 'positional', 'spot light', or 'ambient' are examples of the light_type.
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