1 files changed, 15 insertions, 0 deletions
diff --git a/src/gui/math3d/qvector4d.h b/src/gui/math3d/qvector4d.h
index 4bd3822133..810380b805 100644
--- a/src/gui/math3d/qvector4d.h
+++ b/src/gui/math3d/qvector4d.h
@@ -82,6 +82,9 @@ public:
     void setZ(float z);
     void setW(float w);
 
+    float &operator[](int i);
+    float operator[](int i) const;
+
     float length() const;
     float lengthSquared() const;
 
@@ -158,6 +161,18 @@ inline void QVector4D::setY(float aY) { yp = aY; }
 inline void QVector4D::setZ(float aZ) { zp = aZ; }
 inline void QVector4D::setW(float aW) { wp = aW; }
 
+inline float &QVector4D::operator[](int i)
+{
+    Q_ASSERT(uint(i) < 4u);
+    return *(&xp + i);
+}
+
+inline float QVector4D::operator[](int i) const
+{
+    Q_ASSERT(uint(i) < 4u);
+    return *(&xp + i);
+}
+
 inline QVector4D &QVector4D::operator+=(const QVector4D &vector)
 {
     xp += vector.xp;