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/*****************************************************************************
* $CAMITK_LICENCE_BEGIN$
*
* CamiTK - Computer Assisted Medical Intervention ToolKit
* (c) 2001-2024 Univ. Grenoble Alpes, CNRS, Grenoble INP - UGA, TIMC, 38000 Grenoble, France
*
* Visit http://camitk.imag.fr for more information
*
* This file is part of CamiTK.
*
* CamiTK is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* CamiTK is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with CamiTK. If not, see <http://www.gnu.org/licenses/>.
*
* $CAMITK_LICENCE_END$
****************************************************************************/
#include "ComputeSelectionBarycenter.h"
#include <Property.h>
using namespace camitk;
#include <QVector3D>
#include <vtkSelectionNode.h>
#include <vtkIdTypeArray.h>
// --------------- Constructor -------------------
ComputeSelectionBarycenter::ComputeSelectionBarycenter(ActionExtension* extension) : Action(extension) {
// Setting name, description and input component
setName("Compute Selection Barycenter");
setDescription("This action demonstrates how to compute the barycenter of the currently selected mesh nodes");
setComponentClassName("MeshComponent");
// Setting classification family and tags
setFamily("Tutorial");
addTag("Selection");
addTag("Points");
// Setting the action's parameters
Property* barycenter = new Property("Selection Barycenter", QVector3D(0.0, 0.0, 0.0), "Geometric barycenter of the currently selected mesh nodes", "same as the mesh");
barycenter->setReadOnly(true);
addParameter(barycenter);
}
// --------------- destructor -------------------
ComputeSelectionBarycenter::~ComputeSelectionBarycenter() {
// Do not do anything yet.
// Delete stuff if you create stuff
// (except if you use smart pointers of course !!)
}
// --------------- apply -------------------
Action::ApplyStatus ComputeSelectionBarycenter::apply() {
MeshComponent* input = dynamic_cast<MeshComponent*>(getTargets().last());
process(input);
return SUCCESS;
}
// --------------- process -------------------
void ComputeSelectionBarycenter::process(MeshComponent* comp) {
QVector3D barycenter;
//-- get selected points
vtkSmartPointer<vtkSelectionNode> currentlySelected = comp->getSelection("Picked Selection");
if (currentlySelected != NULL) {
vtkSmartPointer<vtkIdTypeArray> idList = vtkIdTypeArray::SafeDownCast(currentlySelected->GetSelectionList());
// if the selection is not empty
if (idList != NULL) {
//-- loop the array and compute the barycenter
double* pos;
for (vtkIdType i = 0; i < idList->GetNumberOfTuples(); i++) {
// get the position of the i-th selected point (its index is the i-th value of the list)
pos = comp->getPointSet()->GetPoints()->GetPoint(idList->GetValue(i));
barycenter += QVector3D(pos[0], pos[1], pos[2]);
}
barycenter /= (double) idList->GetNumberOfTuples();
}
}
//-- update the property
setProperty("Selection Barycenter", barycenter);
//-- update the widget (to show the new barycenter)
getWidget()->update();
}
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