【摘要】 光子映射是近年发展起来的一种新的全局光照算法。本文依据光子映射对实体物体的渲染,将其扩展到对包含参与介质的场景的渲染,为此提出了一个两路的渲染算法。在第一路中,光子从光源发射,并使用光子追踪来构造体光子图;第二路从视点出发向场景中发射光线,使用光线追踪来进行渲染,其中,根据构造好的光子图,用光线步进进行递归的辐射估计,得出最终光强。更多还原

【Abstract】 Photon mapping is a new global illumination algorithm developed in recent years.This article presents a two-pass algorithm to render the scene including participating media,and this algorithm is an expansion of the rendering to solid objects with photon mapping.In the first pass,photons are emitted from a light source.We use photon tracing to trace each photon and to construct a volume photon map.In the second pass,rays are emitted from a sight point.We use ray tracing to trace each ray and use ray marching to perform recursive radiance estimation with the constructed volume photon map and get the final intensity.更多还原