示例#1
0
void PlaneFitSmoothing::SmoothPoints(unsigned int iterations, const std::vector<unsigned long>& point_indices)
{
    MeshCore::MeshPoint center;
    MeshCore::MeshPointArray PointArray = kernel.GetPoints();

    MeshCore::MeshPointIterator v_it(kernel);
    MeshCore::MeshRefPointToPoints vv_it(kernel);
    MeshCore::MeshPointArray::_TConstIterator v_beg = kernel.GetPoints().begin();

    for (unsigned int i=0; i<iterations; i++) {
        Base::Vector3f N, L;
        for (std::vector<unsigned long>::const_iterator it = point_indices.begin(); it != point_indices.end(); ++it) {
            v_it.Set(*it);
            MeshCore::PlaneFit pf;
            pf.AddPoint(*v_it);
            center = *v_it;
            const std::set<unsigned long>& cv = vv_it[v_it.Position()];
            if (cv.size() < 3)
                continue;

            std::set<unsigned long>::const_iterator cv_it;
            for (cv_it = cv.begin(); cv_it !=cv.end(); ++cv_it) {
                pf.AddPoint(v_beg[*cv_it]);
                center += v_beg[*cv_it];
            }

            float scale = 1.0f/((float)cv.size()+1.0f);
            center.Scale(scale,scale,scale);

            // get the mean plane of the current vertex with the surrounding vertices
            pf.Fit();
            N = pf.GetNormal();
            N.Normalize();

            // look in which direction we should move the vertex
            L.Set(v_it->x - center.x, v_it->y - center.y, v_it->z - center.z);
            if (N*L < 0.0)
                N.Scale(-1.0, -1.0, -1.0);

            // maximum value to move is distance to mean plane
            float d = std::min<float>((float)fabs(this->tolerance),(float)fabs(N*L));
            N.Scale(d,d,d);

            PointArray[v_it.Position()].Set(v_it->x - N.x, v_it->y - N.y, v_it->z - N.z);
        }

        // assign values without affecting iterators
        unsigned long count = kernel.CountPoints();
        for (unsigned long idx = 0; idx < count; idx++) {
            kernel.SetPoint(idx, PointArray[idx]);
        }
    }
}
示例#2
0
void ParameterCorrection::CalcEigenvectors()
{
    MeshCore::PlaneFit planeFit;
    //for (it = aclPoints.begin(); it!=aclPoints.end(); ++it)
    //    planeFit.AddPoint(*it);
    for (int i=_pvcPoints->Lower(); i<=_pvcPoints->Upper(); i++) {
        planeFit.AddPoint(Base::Vector3f(
            (float)(*_pvcPoints)(i).X(),
            (float)(*_pvcPoints)(i).Y(),
            (float)(*_pvcPoints)(i).Z()));
    }


    planeFit.Fit();
    _clU = planeFit.GetDirU();
    _clV = planeFit.GetDirV();
    _clW = planeFit.GetNormal();
}