QMatrix4x4::scale(qreal,qreal) and QMatrix4x4::translate(qreal,qreal) methods

2 files changed, 81 insertions, 2 deletions

diff --git a/src/gui/math3d/qmatrix4x4.cpp b/src/gui/math3d/qmatrix4x4.cpp
index 976315f..fd4f69a 100644
--- a/src/gui/math3d/qmatrix4x4.cpp
+++ b/src/gui/math3d/qmatrix4x4.cpp
@@ -740,6 +740,43 @@ QMatrix4x4& QMatrix4x4::scale(const QVector3D& vector)
     \overload
 
     Multiplies this matrix by another that scales coordinates by the
+    components \a x, and \a y.  Returns this matrix.
+
+    \sa translate(), rotate()
+*/
+QMatrix4x4& QMatrix4x4::scale(qreal x, qreal y)
+{
+    float vx(x);
+    float vy(y);
+    if (flagBits == Identity) {
+        m[0][0] = vx;
+        m[1][1] = vy;
+        flagBits = Scale;
+    } else if (flagBits == Scale || flagBits == (Scale | Translation)) {
+        m[0][0] *= vx;
+        m[1][1] *= vy;
+    } else if (flagBits == Translation) {
+        m[0][0] = vx;
+        m[1][1] = vy;
+        flagBits |= Scale;
+    } else {
+        m[0][0] *= vx;
+        m[0][1] *= vx;
+        m[0][2] *= vx;
+        m[0][3] *= vx;
+        m[1][0] *= vy;
+        m[1][1] *= vy;
+        m[1][2] *= vy;
+        m[1][3] *= vy;
+        flagBits = General;
+    }
+    return *this;
+}
+
+/*!
+    \overload
+
+    Multiplies this matrix by another that scales coordinates by the
     components \a x, \a y, and \a z.  Returns this matrix.
 
     \sa translate(), rotate()
@@ -872,6 +909,46 @@ QMatrix4x4& QMatrix4x4::translate(const QVector3D& vector)
     \overload
 
     Multiplies this matrix by another that translates coordinates
+    by the components \a x, and \a y.  Returns this matrix.
+
+    \sa scale(), rotate()
+*/
+QMatrix4x4& QMatrix4x4::translate(qreal x, qreal y)
+{
+    float vx(x);
+    float vy(y);
+    if (flagBits == Identity) {
+        m[3][0] = vx;
+        m[3][1] = vy;
+        flagBits = Translation;
+    } else if (flagBits == Translation) {
+        m[3][0] += vx;
+        m[3][1] += vy;
+    } else if (flagBits == Scale) {
+        m[3][0] = m[0][0] * vx;
+        m[3][1] = m[1][1] * vy;
+        m[3][2] = 0.;
+        flagBits |= Translation;
+    } else if (flagBits == (Scale | Translation)) {
+        m[3][0] += m[0][0] * vx;
+        m[3][1] += m[1][1] * vy;
+    } else {
+        m[3][0] += m[0][0] * vx + m[1][0] * vy;
+        m[3][1] += m[0][1] * vx + m[1][1] * vy;
+        m[3][2] += m[0][2] * vx + m[1][2] * vy;
+        m[3][3] += m[0][3] * vx + m[1][3] * vy;
+        if (flagBits == Rotation)
+            flagBits |= Translation;
+        else if (flagBits != (Rotation | Translation))
+            flagBits = General;
+    }
+    return *this;
+}
+
+/*!
+    \overload
+
+    Multiplies this matrix by another that translates coordinates
     by the components \a x, \a y, and \a z.  Returns this matrix.
 
     \sa scale(), rotate()
diff --git a/src/gui/math3d/qmatrix4x4.h b/src/gui/math3d/qmatrix4x4.h
index f946da8..79613a0 100644
--- a/src/gui/math3d/qmatrix4x4.h
+++ b/src/gui/math3d/qmatrix4x4.h
@@ -130,9 +130,11 @@ public:
     QMatrix4x4& translate(const QVector3D& vector);
     QMatrix4x4& rotate(qreal angle, const QVector3D& vector);
 #endif
-    QMatrix4x4& scale(qreal x, qreal y, qreal z = 1.0f);
+    QMatrix4x4& scale(qreal x, qreal y);
+    QMatrix4x4& scale(qreal x, qreal y, qreal z);
     QMatrix4x4& scale(qreal factor);
-    QMatrix4x4& translate(qreal x, qreal y, qreal z = 0.0f);
+    QMatrix4x4& translate(qreal x, qreal y);
+    QMatrix4x4& translate(qreal x, qreal y, qreal z);
     QMatrix4x4& rotate(qreal angle, qreal x, qreal y, qreal z = 0.0f);
 #ifndef QT_NO_QUATERNION
     QMatrix4x4& rotate(const QQuaternion& quaternion);