Hemicube
From Wikipedia, the free encyclopedia
- See also Hemi-cube (geometry)
Unfolding a hemicube
A Hemicube is a concept used in 3D computer graphics rendering. A hemicube is one way to represent a 180° view from a surface or point in space.
[edit] Shape
Although the name implies any half of a cube, a hemicube is usually a cube cut through a plane parallel to one of its faces. Therefore it consists of one square face, and four 2:1 aspect ratio rectangles.
[edit] Uses
The hemicube may be used in the Radiosity algorithm or other Light Transport algorithms in order to determine the amount of light arriving at a particular point on a surface.
In some cases, a hemicube may be used in Environment Mapping or Reflection Mapping.
