Computational Aspects of Higher Order Interpolation for Hierarchical Discontinuity Meshing in Radiosity Rendering

摘要

Higher order interpolants for the illumination distribution in a virtual environment offer a closer approximation to the unknown illumination function. In the past, non-constant basis functions have been associated with higher computational cost in radiosity rendering. In this article, we describe a new computational technique that efficiently combines hierarchical discontinuity meshing with higher order basis functions. We show that higher order boasis functions employed on hierarchical discontinuity meshing has a dual positive effect, that is, we can increase both the computational efficiency and the accuracy of the interpolant, resulting in smoother shadows, less aliasing along the discontinuity edges and a more faithful reproduction of illumination rendering.