| 翻訳と辞書 |
| Volumetric path tracing ： ウィキペディア英語版 |
Volumetric path tracing
Volumetric path tracing is a method for rendering images in computer graphics which was first introduced by Lafortune and Willems. This method enhances the rendering of the lighting in a scene by extending the path tracing method with the effect of light scattering. It is used for photorealistic effects of participating media like fire, explosions, smoke, clouds, fog or soft shadows.
As in the path tracing method a ray gets followed backwards, beginning from the eye on, until reaching the light source. In volumetric path tracing scatter events can occur while these process. When a light ray hits a surface, a special amount of it can get scattered into the media.
==Description==
The algorithm is based on the volumetric rendering equation, which extends the rendering equation with a scattering term.
It is composed of an absorption, out-scattering, emission and an in-scattering part. The absorption and out-scattering together form the extinction term. The in-scattering is the most expensive part to calculate because it needs an integration over all paths in the scene that consist radiance. Therefore, thousands of paths need to be traced to get a result with a good quality without much noise. For a better handling the in-scattering term can be split into two components, the single scattering and the multiple scattering.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Volumetric path tracing」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|