cube environment map filtering is broken
Brought to you by:
ltatkinson,
pgregory
Menu
▾
▴
#324 cube environment map filtering is broken
When creating the fisheye lens scene (soon to be in the content directory in svn) I discovered two ways in which the current cube environment mapping is broken.
1) It's recommended to render faces of the cube with a field of view slightly greater than 90 degrees so that filtering can occur properly. However, using "fov" 93 results in maps which don't fit together. This is because CqEnvironmentMapOld::SampleMap() doesn't correctly scale u and v by m_fov.
2) The mipmap level calculation seems to be completely broken (I have no idea why it works at all currently!): CqEnvironmentMapOld::SampleMap() calls CalculateLevel(u,v) where it should be calling CalculateLevel(du,dv) where du and dv are the filter sizes. Unfortunately the current code doesn't lend itself to computing du and dv without some refactoring (too much for the very imminent 1.4 release).
Discussion
Anonymous
Logged In: YES
user_id=1086736
Originator: YES
This will be fixed when aqsistex supports environment mapping. It could be fixed before that, with some additional effort.
Logged In: YES
user_id=1086736
Originator: YES
Environment filtering was moved into aqsistex between revisions 2347 and 2370, fixing this issue.