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castano 2007-10-14 08:45:29 +00:00
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@ -6,7 +6,7 @@ This format was introduced in the original nvdxt library and since then it has b
=== RXGB ===
The DOOM 3 engine and its derivates use the so called RXGB format, that is just like DXT5, but with the Red and Alpha components swapped, which means that the normal is given by the (a, g, b) components. Surprisingly, the error of this method is usually lower than DXT5nm.
The DOOM 3 engine and its derivates use the so called RXGB format, that is just like DXT5, but with the Red and Alpha components swapped, which means that the normal is given by the (a, g, b) components. Not surprisingly the error of this method is usually lower than DXT5nm, since it retains more information from the original.
=== BC5 ===
@ -38,5 +38,3 @@ The main disadvantage is that the reconstruction is done after interpolation and
Another approach is to use a stereographic projection. This projection has a slightly better behavior under interpolation and is only slightly more expensive. The distribution of normals is also more uniform, although it's not clear whether that's good or not.