diff --git a/Shape.cpp b/Shape.cpp
index 8640604..8c8d8a4 100644
--- a/Shape.cpp
+++ b/Shape.cpp
@@ -387,16 +387,7 @@ QTransform Ellipse::fromUnitCircle() const
 
 bool Ellipse::includesPoint(qreal x, qreal y)
 {
-  // From: http://stackoverflow.com/questions/7946187/point-and-ellipse-rotated-position-test-algorithm
-  qreal rotation = getRotationRadians();
-  const QPointF& center = getCenter();
-  qreal xDiff = x - center.x();
-  qreal yDiff = y - center.y();
-  qreal cosRotation = cos(rotation);
-  qreal sinRotation = sin(rotation);
-  qreal horizontal = (cosRotation*xDiff + sinRotation*yDiff) / getHorizontalRadius();
-  qreal vertical   = (sinRotation*xDiff - cosRotation*yDiff) / getVerticalRadius();
-  return (horizontal*horizontal + vertical*vertical) <= 1;
+  return (QVector2D(toUnitCircle().map(QPointF(x, y))).length() <= 1);
 }
 
 void Ellipse::setVertex(int i, const QPointF& v)