平へい行こう光こう源げん

noun

directional light source

Technical term used in computing and graphics for a light source that emits parallel rays, such as sunlight or a distant spotlight.

• 3Dレンダリングでは、平へい行こう光こう源げんを使つかって影かげを計けい算さんすることが多おおい。

  In 3D rendering, directional light sources are often used to calculate shadows.