From VRML 2 Basic Concepts and Definitions CPS616 -- Information Track of CPS -- Spring Semester 98. byZeynep Ozdemir, Rob Baker, Meryem Ispirli, Geoffrey C. Fox (Definition and Example)
A DirectionalLight is a light aimed at the world from infinitely far away so that all of its light rays are parallel and point in the same direction
DirectionalLight {
ambientIntensity 0 # exposedField SFFloat
color 1 1 1 # exposedField SFColor
direction 0 0 -1 # exposedField SFVec3f
intensity 1 # exposedField SFFloat
on TRUE # exposedField SFBool
}
direction field defines a 3-D vector which indicates the direction for the light rays.