123 lines
3.3 KiB
C++
123 lines
3.3 KiB
C++
/**
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* @file creating_widgets.cpp
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* @brief Creating custom widgets using VTK
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* @author Ozan Cagri Tonkal
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*/
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#ifndef USE_VTK
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#include <iostream>
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int main()
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{
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std::cout << "This sample requires direct compilation with VTK. Stop" << std::endl;
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return 0;
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}
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#else
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#include <opencv2/viz.hpp>
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#include <opencv2/viz/widget_accessor.hpp>
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#include <iostream>
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#include <vtkPoints.h>
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#include <vtkTriangle.h>
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#include <vtkCellArray.h>
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#include <vtkPolyData.h>
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#include <vtkPolyDataMapper.h>
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#include <vtkIdList.h>
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#include <vtkActor.h>
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#include <vtkProp.h>
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using namespace cv;
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using namespace std;
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/**
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* @function help
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* @brief Display instructions to use this tutorial program
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*/
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static void help()
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{
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cout
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<< "--------------------------------------------------------------------------" << endl
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<< "This program shows how to create a custom widget. You can create your own "
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<< "widgets by extending Widget2D/Widget3D, and with the help of WidgetAccessor." << endl
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<< "Usage:" << endl
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<< "./creating_widgets" << endl
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<< endl;
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}
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/**
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* @class TriangleWidget
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* @brief Defining our own 3D Triangle widget
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*/
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class WTriangle : public viz::Widget3D
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{
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public:
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WTriangle(const Point3f &pt1, const Point3f &pt2, const Point3f &pt3, const viz::Color & color = viz::Color::white());
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};
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/**
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* @function TriangleWidget::TriangleWidget
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* @brief Constructor
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*/
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WTriangle::WTriangle(const Point3f &pt1, const Point3f &pt2, const Point3f &pt3, const viz::Color & color)
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{
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// Create a triangle
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vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
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points->InsertNextPoint(pt1.x, pt1.y, pt1.z);
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points->InsertNextPoint(pt2.x, pt2.y, pt2.z);
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points->InsertNextPoint(pt3.x, pt3.y, pt3.z);
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vtkSmartPointer<vtkTriangle> triangle = vtkSmartPointer<vtkTriangle>::New();
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triangle->GetPointIds()->SetId(0,0);
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triangle->GetPointIds()->SetId(1,1);
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triangle->GetPointIds()->SetId(2,2);
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vtkSmartPointer<vtkCellArray> cells = vtkSmartPointer<vtkCellArray>::New();
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cells->InsertNextCell(triangle);
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// Create a polydata object
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vtkSmartPointer<vtkPolyData> polyData = vtkSmartPointer<vtkPolyData>::New();
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// Add the geometry and topology to the polydata
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polyData->SetPoints(points);
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polyData->SetPolys(cells);
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// Create mapper and actor
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vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
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#if VTK_MAJOR_VERSION <= 5
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mapper->SetInput(polyData);
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#else
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mapper->SetInputData(polyData);
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#endif
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vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
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actor->SetMapper(mapper);
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// Store this actor in the widget in order that visualizer can access it
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viz::WidgetAccessor::setProp(*this, actor);
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// Set the color of the widget. This has to be called after WidgetAccessor.
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setColor(color);
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}
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/**
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* @function main
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*/
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int main()
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{
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help();
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/// Create a window
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viz::Viz3d myWindow("Creating Widgets");
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/// Create a triangle widget
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WTriangle tw(Point3f(0.0,0.0,0.0), Point3f(1.0,1.0,1.0), Point3f(0.0,1.0,0.0), viz::Color::red());
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/// Show widget in the visualizer window
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myWindow.showWidget("TRIANGLE", tw);
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/// Start event loop
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myWindow.spin();
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return 0;
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}
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#endif
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