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Diffstat (limited to 'src/math/geometry.h')
| -rw-r--r-- | src/math/geometry.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/math/geometry.h b/src/math/geometry.h index 2f937e5..d5960b8 100644 --- a/src/math/geometry.h +++ b/src/math/geometry.h @@ -305,6 +305,24 @@ inline void LoadProjectionMatrix(Matrix &mat, float fov = 1.570795f, float aspec /* (3,4) */ mat.m[14] = -q * nearPlane; } +//! Loads an othogonal projection matrix +/** \a left,right coordinates for left and right vertical clipping planes + \a bottom,top coordinates for bottom and top horizontal clipping planes + \a zNear,zFar distance to nearer and farther depth clipping planes */ +inline void LoadOrthoProjectionMatrix(Matrix &mat, float left, float right, float bottom, float top, + float zNear = -1.0f, float zFar = 1.0f) +{ + mat.LoadIdentity(); + + /* (1,1) */ mat.m[0 ] = 2.0f / (right - left); + /* (2,2) */ mat.m[5 ] = 2.0f / (top - bottom); + /* (3,3) */ mat.m[10] = -2.0f / (zFar - zNear); + + /* (1,4) */ mat.m[12] = - (right + left) / (right - left); + /* (2,4) */ mat.m[12] = - (top + bottom) / (top - bottom); + /* (3,4) */ mat.m[14] = - (zFar + zNear) / (zFar - zNear); +} + //! Loads a translation matrix from given vector /** \a trans vector of translation*/ inline void LoadTranslationMatrix(Matrix &mat, const Vector &trans) |