pointerize rotation

Sample/HardParticle/FormFactorAnisoPyramid.cpp

@@ -81,7 +81,7 @@ FormFactorAnisoPyramid::FormFactorAnisoPyramid(double length, double width, doub
 {
 }
 
-IFormFactor* FormFactorAnisoPyramid::sliceFormFactor(ZLimits limits, const IRotation& rot,
+IFormFactor* FormFactorAnisoPyramid::sliceFormFactor(ZLimits limits, const IRotation* rot,
                                                      R3 translation) const
 {
     auto effects = computeSlicingEffects(limits, translation, m_height);