diff options
| author | Sean Harmer <sean.harmer@kdab.com> | 2014-04-19 16:36:35 +0100 |
|---|---|---|
| committer | The Qt Project <gerrit-noreply@qt-project.org> | 2014-05-16 09:53:58 +0200 |
| commit | ca15825ed4a1d4c8642c2292760726ebdcda863b (patch) | |
| tree | ca28f9e9d3938386379b3c963d475382fca86166 /src/gui/math3d/qmatrix4x4.h | |
| parent | 71fb3633e8d909e9a91e1bee6eaf53c146f25998 (diff) | |
Add viewport transform to QMatrix4x4
This allows to easily create a matrix that performs the transformation
used by OpenGL fixed function to go from normalized device coordinates
to window coordinates.
This comes in useful if you need to perform the NDC->window coordinate
conversion inside a shader.
Change-Id: I183b3545bfb3eb1e8b13fc3172911b46926fcbb7
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Diffstat (limited to 'src/gui/math3d/qmatrix4x4.h')
| -rw-r--r-- | src/gui/math3d/qmatrix4x4.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/gui/math3d/qmatrix4x4.h b/src/gui/math3d/qmatrix4x4.h index d4ba7d64d8..c42ccc2dc5 100644 --- a/src/gui/math3d/qmatrix4x4.h +++ b/src/gui/math3d/qmatrix4x4.h @@ -148,6 +148,8 @@ public: #ifndef QT_NO_VECTOR3D void lookAt(const QVector3D& eye, const QVector3D& center, const QVector3D& up); #endif + void viewport(const QRectF &rect); + void viewport(float left, float bottom, float width, float height, float nearPlane = 0.0f, float farPlane = 1.0f); void flipCoordinates(); void copyDataTo(float *values) const; @@ -1077,6 +1079,11 @@ inline float *QMatrix4x4::data() return *m; } +inline void QMatrix4x4::viewport(const QRectF &rect) +{ + viewport(rect.x(), rect.y(), rect.width(), rect.height()); +} + #ifndef QT_NO_DEBUG_STREAM Q_GUI_EXPORT QDebug operator<<(QDebug dbg, const QMatrix4x4 &m); #endif |