Universal Dataset Number 160

Name:   Light Source
Status: Current
Owner:  General
Revision Date: 15-JAN-1986
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Record 1:       FORMAT(I10,20A1)
                Field 1      -- label number
                Field 2      -- name
Record 2:       FORMAT(5I10)
                Field 1      -- Viewport mask
                Field 2      -- Light color index
                Field 3      -- Location method
                                = 0 - CENTER OF PROJECTION
                                = 1 - GLOBAL WORLD POSITION
                                = 2 - SCREEN POSITION
                                = 3 - WORLD SPACE INFINITY
                                = 4 - SCREEN INFINITY
                Field 4      -- Aim method
                                = 0 - TARGET
                                = 1 - GLOBAL POSITION
                                = 2 - SCREEN POSITION
                                = 3 - GLOBAL VECTOR
                                = 4 - SCREEN VECTOR
                Field 5      -- Focus / Flap option
                                = 0 - Omni-directional light, no flap
                                      or focus
                                = 1 - Focus with no flap
                                = 2 - Flap with no focus
                                = 3 - Light is attenuated by focus and
                                      blocked by the flap.
Record 3:       FORMAT(4E13.5)
                Field 1-3    -- Light position or direction vector
                Field 4-6    -- Light aim vector
                Field 7      -- Intensity
                Field 8      -- Focus cosine
                                0.0 <= FOCUS <= 0.9999
                Field 9      -- Flap cosine
                                0.0 <= FLAP <= 0.9999
                Field 10     -- Power definition distance
 
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