Method hasNonZeroKeyFrames

OgreMain/src/OgreAnimationTrack.cpp:593–617

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        void NodeAnimationTrack::_keyFrameDataChanged() const { mSplineBuildNeeded = true; }
        //---------------------------------------------------------------------
        bool NodeAnimationTrack::hasNonZeroKeyFrames() const
        {
            KeyFrameList::const_iterator i = mKeyFrames.begin();
            for( ; i != mKeyFrames.end(); ++i )
            {
                // look for keyframes which have any component which is non-zero
                // Since exporters can be a little inaccurate sometimes we use a
                // tolerance value rather than looking for nothing
                TransformKeyFrame *kf = static_cast<TransformKeyFrame *>( *i );
                Vector3 trans = kf->getTranslate();
                Vector3 scale = kf->getScale();
                Vector3 axis;
                Radian angle;
                kf->getRotation().ToAngleAxis( angle, axis );
                Real tolerance = 1e-3f;
                if( !trans.positionEquals( Vector3::ZERO, tolerance ) ||
                    !scale.positionEquals( Vector3::UNIT_SCALE, tolerance ) ||
                    !Math::RealEqual( angle.valueRadians(), 0.0f, tolerance ) )
                {
                    return true;
                }
            }

            return false;
        }
        //---------------------------------------------------------------------
        void NodeAnimationTrack::optimise()
        {