RENDERING APPARATUS AND METHOD FOR REAL-TIME GLOBAL ILLUMINATION IN REAL LIGHT ENVIRONMENT

摘要

A rendering apparatus for real-time global illumination and a method thereof are disclosed. The rendering apparatus includes: a spherical harmonic processor for creating light samples and creating spherical harmonics basis functions; a light model processor for transforming radiance of a HDRI image to spherical harmonics light coefficients using the spherical harmonic basis functions; a radiance transfer processor for previously calculating coefficients of a visibility and a geometric term for a global illumination model using the spherical harmonic basis function; a BRDF processor for generating a database of BRDF data and calculating coefficients of the BRDF data through smoothing; and a render unit for rendering the spherical harmonic light coefficients, the coefficients for the visibility and the geometric term, and the BRDF data coefficient using a rendering equation expressed as a dot product of a vector.