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| author | Egor Yusov <egor.yusov@gmail.com> | 2018-03-26 03:35:37 +0000 |
|---|---|---|
| committer | Egor Yusov <egor.yusov@gmail.com> | 2018-03-26 03:35:37 +0000 |
| commit | f419bd2c4fa2bf8df5df29100eae6fbca1d2578a (patch) | |
| tree | b3937bf1df662fe5460eaf2da880f7b7fbb56ae2 /Common/interface | |
| parent | Added a couple of #includes to fix include test build errors (diff) | |
| download | DiligentCore-f419bd2c4fa2bf8df5df29100eae6fbca1d2578a.tar.gz DiligentCore-f419bd2c4fa2bf8df5df29100eae6fbca1d2578a.zip | |
Added functions for Ortho projection matrix
Diffstat (limited to 'Common/interface')
| -rw-r--r-- | Common/interface/BasicMath.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Common/interface/BasicMath.h b/Common/interface/BasicMath.h index eae2dc8a..de42c49e 100644 --- a/Common/interface/BasicMath.h +++ b/Common/interface/BasicMath.h @@ -1180,6 +1180,22 @@ inline float4x4 Projection(float fov, float aspectRatio, float zNear, float zFar return mOut; } +inline float4x4 OrthoOffCenter(float left, float right, float bottom, float top, float zNear, float zFar, bool bIsDirectX) // Left-handed ortho projection +{ + float _22 = (bIsDirectX ? 1.f : 2.f) / (zFar - zNear); + float _32 = (bIsDirectX ? zNear : zNear + zFar) / (zNear - zFar); + return float4x4 ( + 2.f / (right - left), 0.f, 0.f, 0.f, + 0.f, 2.f/(top - bottom), 0.f, 0.f, + 0.f, 0.f, _22, 0.f, + (left + right)/(left - right), (top + bottom) / (bottom - top), _32, 1.f + ); +} + +inline float4x4 Ortho(float width, float height, float zNear, float zFar, bool bIsDirectX) // Left-handed ortho projection +{ + return OrthoOffCenter(-width * 0.5f, +width * 0.5f, -height * 0.5f, +height * 0.5f, zNear, zFar, bIsDirectX); +} struct Quaternion { |