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implement trimming of a mesh with a plane

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This commit is contained in:
wmayer
2019-09-14 17:05:20 +02:00
parent b48e8b0f0d
commit 79a722830d
8 changed files with 296 additions and 44 deletions
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62
src/Mod/MeshPart/Gui/Command.cpp
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@@ -101,8 +101,8 @@ void CmdMeshPartTrimByPlane::activated(int)
msgBox.setIcon(QMessageBox::Question);
msgBox.setWindowTitle(qApp->translate("MeshPart_TrimByPlane","Trim by plane"));
msgBox.setText(qApp->translate("MeshPart_TrimByPlane","Select the side you want to keep."));
QPushButton* inner = msgBox.addButton(qApp->translate("MeshPart_TrimByPlane","Inner"), QMessageBox::ActionRole);
QPushButton* outer = msgBox.addButton(qApp->translate("MeshPart_TrimByPlane","Outer"), QMessageBox::ActionRole);
QPushButton* inner = msgBox.addButton(qApp->translate("MeshPart_TrimByPlane","Below"), QMessageBox::ActionRole);
QPushButton* outer = msgBox.addButton(qApp->translate("MeshPart_TrimByPlane","Above"), QMessageBox::ActionRole);
QPushButton* split = msgBox.addButton(qApp->translate("MeshPart_TrimByPlane","Split"), QMessageBox::ActionRole);
msgBox.setDefaultButton(inner);
msgBox.exec();
@@ -123,65 +123,41 @@ void CmdMeshPartTrimByPlane::activated(int)
return;
}
Base::Placement plm = static_cast<App::GeoFeature*>(plane.front())->Placement.getValue();
Base::Vector3d normal(0,0,1);
plm.getRotation().multVec(normal, normal);
Base::Vector3d up(-1,0,0);
plm.getRotation().multVec(up, up);
Base::Vector3d view(0,1,0);
plm.getRotation().multVec(view, view);
Base::Vector3d base = plm.getPosition();
Base::Rotation rot(Base::Vector3d(0,0,1), view);
Base::Matrix4D mat;
rot.getValue(mat);
Base::ViewProjMatrix proj(mat);
Base::Placement plnPlacement = static_cast<App::GeoFeature*>(plane.front())->Placement.getValue();
openCommand("Trim with plane");
std::vector<App::DocumentObject*> docObj = Gui::Selection().getObjectsOfType(Mesh::Feature::getClassTypeId());
for (std::vector<App::DocumentObject*>::iterator it = docObj.begin(); it != docObj.end(); ++it) {
Base::Vector3d normal(0,0,1);
plnPlacement.getRotation().multVec(normal, normal);
Base::Vector3d base = plnPlacement.getPosition();
Mesh::MeshObject* mesh = static_cast<Mesh::Feature*>(*it)->Mesh.startEditing();
Base::BoundBox3d bbox = mesh->getBoundBox();
double len = bbox.CalcDiagonalLength();
// project center of bbox onto plane and use this as base point
Base::Vector3d cnt = bbox.GetCenter();
double dist = (cnt-base)*normal;
base = cnt - normal * dist;
proj.setTransform(Base::Matrix4D());
// Apply the inverted mesh placement to the plane because the trimming is done
// on the untransformed mesh data
Base::Placement meshPlacement = mesh->getPlacement();
meshPlacement.invert();
meshPlacement.multVec(base, base);
meshPlacement.getRotation().multVec(normal, normal);
Base::Vector3d p1 = base + up * len;
Base::Vector3d p2 = base - up * len;
Base::Vector3d p3 = p2 + normal * len;
Base::Vector3d p4 = p1 + normal * len;
p1 = proj(p1);
p2 = proj(p2);
p3 = proj(p3);
p4 = proj(p4);
// must be set after getting the transformed polygon points
proj.setTransform(mesh->getTransform());
Base::Polygon2d polygon2d;
polygon2d.Add(Base::Vector2d(p1.x, p1.y));
polygon2d.Add(Base::Vector2d(p2.x, p2.y));
polygon2d.Add(Base::Vector2d(p3.x, p3.y));
polygon2d.Add(Base::Vector2d(p4.x, p4.y));
Base::Vector3f plnBase = Base::convertTo<Base::Vector3f>(base);
Base::Vector3f plnNormal = Base::convertTo<Base::Vector3f>(normal);
if (role == Gui::SelectionRole::Inner) {
mesh->trim(polygon2d, proj, Mesh::MeshObject::INNER);
mesh->trim(plnBase, plnNormal);
static_cast<Mesh::Feature*>(*it)->Mesh.finishEditing();
}
else if (role == Gui::SelectionRole::Outer) {
mesh->trim(polygon2d, proj, Mesh::MeshObject::OUTER);
mesh->trim(plnBase, -plnNormal);
static_cast<Mesh::Feature*>(*it)->Mesh.finishEditing();
}
else if (role == Gui::SelectionRole::Split) {
Mesh::MeshObject copy(*mesh);
mesh->trim(polygon2d, proj, Mesh::MeshObject::INNER);
mesh->trim(plnBase, plnNormal);
static_cast<Mesh::Feature*>(*it)->Mesh.finishEditing();
copy.trim(polygon2d, proj, Mesh::MeshObject::OUTER);
copy.trim(plnBase, -plnNormal);
App::Document* doc = (*it)->getDocument();
Mesh::Feature* fea = static_cast<Mesh::Feature*>(doc->addObject("Mesh::Feature"));
fea->Label.setValue((*it)->Label.getValue());