diff options
| author | Konstantin Ritt <ritt.ks@gmail.com> | 2015-01-26 11:37:45 +0400 |
|---|---|---|
| committer | Sean Harmer <sean.harmer@kdab.com> | 2015-01-28 12:37:52 +0000 |
| commit | 6ef40175e50599a9c19d25cd1e2d3a658a61b494 (patch) | |
| tree | 175a01ba84fa9cfec5051ac37c640ddfeb16ed92 /src/gui/math3d/qmatrix4x4.h | |
| parent | 14419b0a2b63c774e11dec10967495b19540bbb3 (diff) | |
Introduce QMatrix4x4::isAffine()
- a convenience method thats checks if the matrix
has no projective coefficients.
Change-Id: Ieea8ac2e4237b471a683ad5010672b1e89a0c953
Reviewed-by: Sean Harmer <sean.harmer@kdab.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 31a4dbf1ca..74329b7cdd 100644 --- a/src/gui/math3d/qmatrix4x4.h +++ b/src/gui/math3d/qmatrix4x4.h @@ -77,6 +77,8 @@ public: inline void setRow(int index, const QVector4D& value); #endif + inline bool isAffine() const; + inline bool isIdentity() const; inline void setToIdentity(); @@ -302,6 +304,11 @@ inline void QMatrix4x4::setRow(int index, const QVector4D& value) Q_GUI_EXPORT QMatrix4x4 operator/(const QMatrix4x4& matrix, float divisor); +inline bool QMatrix4x4::isAffine() const +{ + return m[0][3] == 0.0f && m[1][3] == 0.0f && m[2][3] == 0.0f && m[3][3] == 1.0f; +} + inline bool QMatrix4x4::isIdentity() const { if (flagBits == Identity) |