Optimize label rotations a bit

Change-Id: Ie6075aefa70228769d5a2717e9d96c23b9fee494
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/src/datavisualization/utils/utils.cpp b/src/datavisualization/utils/utils.cpp
index b00d1251..7343148d 100644
--- a/src/datavisualization/utils/utils.cpp
+++ b/src/datavisualization/utils/utils.cpp
@@ -234,4 +234,13 @@ float Utils::wrapValue(float value, float min, float max)
     return value;
 }
 
+QQuaternion Utils::calculateRotation(const QVector3D &xyzRotations)
+{
+    QQuaternion rotQuatX = QQuaternion::fromAxisAndAngle(1.0f, 0.0f, 0.0f, xyzRotations.x());
+    QQuaternion rotQuatY = QQuaternion::fromAxisAndAngle(0.0f, 1.0f, 0.0f, xyzRotations.y());
+    QQuaternion rotQuatZ = QQuaternion::fromAxisAndAngle(0.0f, 0.0f, 1.0f, xyzRotations.z());
+    QQuaternion totalRotation = rotQuatY * rotQuatZ * rotQuatX;
+    return totalRotation;
+}
+
 QT_END_NAMESPACE_DATAVISUALIZATION
diff --git a/src/datavisualization/utils/utils_p.h b/src/datavisualization/utils/utils_p.h
index 46df980f..a7c73731 100644
--- a/src/datavisualization/utils/utils_p.h
+++ b/src/datavisualization/utils/utils_p.h
@@ -72,6 +72,7 @@ public:
     static QString defaultLabelFormat();
 
     static float wrapValue(float value, float min, float max);
+    static QQuaternion calculateRotation(const QVector3D &xyzRotations);
 
 private:
     static ParamType mapFormatCharToParamType(const QChar &formatChar);