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]);
}
}
}
virtual std::vector<float> getParameter(FitParameter::Points pts) const {
std::vector<float> values;
MeshCore::PlaneFit fit;
fit.AddPoints(pts);
if (fit.Fit() < FLOAT_MAX) {
Base::Vector3f base = fit.GetBase();
Base::Vector3f axis = fit.GetNormal();
values.push_back(base.x);
values.push_back(base.y);
values.push_back(base.z);
values.push_back(axis.x);
values.push_back(axis.y);
values.push_back(axis.z);
}
return values;
}
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();
}
void CmdApproxPlane::activated(int iMsg)
{
std::vector<App::GeoFeature*> obj = Gui::Selection().getObjectsOfType<App::GeoFeature>();
for (std::vector<App::GeoFeature*>::iterator it = obj.begin(); it != obj.end(); ++it) {
std::map<std::string, App::Property*> Map;
(*it)->getPropertyMap(Map);
for (std::map<std::string, App::Property*>::iterator jt = Map.begin(); jt != Map.end(); ++jt) {
if (jt->second->getTypeId().isDerivedFrom(App::PropertyComplexGeoData::getClassTypeId())) {
std::vector<Base::Vector3d> aPoints;
std::vector<Data::ComplexGeoData::Facet> aTopo;
static_cast<App::PropertyComplexGeoData*>(jt->second)->getFaces(aPoints, aTopo,0.01f);
// get a reference normal for the plane fit
Base::Vector3f refNormal(0,0,0);
if (!aTopo.empty()) {
Data::ComplexGeoData::Facet f = aTopo.front();
Base::Vector3d v1 = aPoints[f.I2] - aPoints[f.I1];
Base::Vector3d v2 = aPoints[f.I3] - aPoints[f.I1];
refNormal = Base::convertTo<Base::Vector3f>(v1 % v2);
}
std::vector<Base::Vector3f> aData;
aData.reserve(aPoints.size());
for (std::vector<Base::Vector3d>::iterator jt = aPoints.begin(); jt != aPoints.end(); ++jt)
aData.push_back(Base::toVector<float>(*jt));
MeshCore::PlaneFit fit;
fit.AddPoints(aData);
float sigma = fit.Fit();
Base::Vector3f base = fit.GetBase();
Base::Vector3f dirU = fit.GetDirU();
Base::Vector3f dirV = fit.GetDirV();
Base::Vector3f norm = fit.GetNormal();
// if the dot product of the reference with the plane normal is negative
// a flip must be done
if (refNormal * norm < 0) {
norm = -norm;
dirU = -dirU;
}
float width, length;
fit.Dimension(width, length);
// move to the corner point
base = base - (0.5f * length * dirU + 0.5f * width * dirV);
Base::CoordinateSystem cs;
cs.setPosition(Base::convertTo<Base::Vector3d>(base));
cs.setAxes(Base::convertTo<Base::Vector3d>(norm),
Base::convertTo<Base::Vector3d>(dirU));
Base::Placement pm = Base::CoordinateSystem().displacement(cs);
double q0, q1, q2, q3;
pm.getRotation().getValue(q0, q1, q2, q3);
Base::Console().Log("RMS value for plane fit with %lu points: %.4f\n", aData.size(), sigma);
Base::Console().Log(" Plane base(%.4f, %.4f, %.4f)\n", base.x, base.y, base.z);
Base::Console().Log(" Plane normal(%.4f, %.4f, %.4f)\n", norm.x, norm.y, norm.z);
std::stringstream str;
str << "from FreeCAD import Base" << std::endl;
str << "App.ActiveDocument.addObject('Part::Plane','Plane_fit')" << std::endl;
str << "App.ActiveDocument.ActiveObject.Length = " << length << std::endl;
str << "App.ActiveDocument.ActiveObject.Width = " << width << std::endl;
str << "App.ActiveDocument.ActiveObject.Placement = Base.Placement("
<< "Base.Vector(" << base.x << "," << base.y << "," << base.z << "),"
<< "Base.Rotation(" << q0 << "," << q1 << "," << q2 << "," << q3 << "))" << std::endl;
openCommand("Fit plane");
doCommand(Gui::Command::Doc, str.str().c_str());
commitCommand();
updateActive();
}
}
}
}
