Unified Distance Formulas for Halfspace Fog

Abstract. In many real-time rendering applications, it is necessary to model a fog volume that is bounded by a single plane but is otherwise infinite in extent. This paper presents unified formulas that provide the correct distance traveled through a fog halfspace for all possible camera and surface point locations. Such formulas effectively remove the need to code for multiple cases separately, thereby achieving optimal fragment shading performance on modern rendering hardware.

• Type: Journal
• Year: 2007
• Where: JGTOOLS
• Authors: Eric Lengyel
• Keywords: Fog Halfspace, Fog Volume, JGTOOLS 2007, Real-time Rendering Applications