General depth buffer linearization

gongminmin / KlayGE

KlayGE is a cross-platform open source game engine with plugin-based architecture.

http://www.klayge.org

GNU General Public License v2.0

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General depth buffer linearization #190

Closed gongminmin closed 5 years ago

gongminmin commented 5 years ago

Current depth buffer linearization is fast but can't process oblique clipping perspective matrix. Need to have a general version of it.

gongminmin commented 5 years ago

Further analyst shows that it's not necessary to modify the depth to linear part. Instead, a non-oblique matrix need to provide when a oblique clipping perspective matrix is in use.

Change the goal to:

[x] Fix the oblique clipping in Ocean
[x] Refactor the near_far_q, extract the duplicated code to one place