d2/d64/tutorial_creating_widgets.html

#ifndef USE_VTK

#include <iostream>

int main()

{

    std::cout << "This sample requires direct compilation with VTK. Stop" << std::endl;

 return 0;

}

#else

#include <opencv2/viz.hpp>

#include <opencv2/viz/widget_accessor.hpp>

#include <iostream>


#include <vtkPoints.h>

#include <vtkTriangle.h>

#include <vtkCellArray.h>

#include <vtkPolyData.h>

#include <vtkPolyDataMapper.h>

#include <vtkIdList.h>

#include <vtkActor.h>

#include <vtkProp.h>


using namespace cv;

using namespace std;


static void help()

{

    cout

    << "--------------------------------------------------------------------------"   << endl

    << "This program shows how to create a custom widget. You can create your own "

    << "widgets by extending Widget2D/Widget3D, and with the help of WidgetAccessor." << endl

    << "Usage:"                                                                       << endl

    << "./creating_widgets"                                                           << endl

    << endl;

}


class WTriangle : public viz::Widget3D

{

 public:

        WTriangle(const Point3f &pt1, const Point3f &pt2, const Point3f &pt3, const viz::Color & color = viz::Color::white());

};


WTriangle::WTriangle(const Point3f &pt1, const Point3f &pt2, const Point3f &pt3, const viz::Color & color)

{

 // Create a triangle

    vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();

    points->InsertNextPoint(pt1.x, pt1.y, pt1.z);

    points->InsertNextPoint(pt2.x, pt2.y, pt2.z);

    points->InsertNextPoint(pt3.x, pt3.y, pt3.z);


    vtkSmartPointer<vtkTriangle> triangle = vtkSmartPointer<vtkTriangle>::New();

    triangle->GetPointIds()->SetId(0,0);

    triangle->GetPointIds()->SetId(1,1);

    triangle->GetPointIds()->SetId(2,2);


    vtkSmartPointer<vtkCellArray> cells = vtkSmartPointer<vtkCellArray>::New();

    cells->InsertNextCell(triangle);


 // Create a polydata object

    vtkSmartPointer<vtkPolyData> polyData = vtkSmartPointer<vtkPolyData>::New();


 // Add the geometry and topology to the polydata

    polyData->SetPoints(points);

    polyData->SetPolys(cells);


 // Create mapper and actor

    vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();

#if VTK_MAJOR_VERSION <= 5

    mapper->SetInput(polyData);

#else

    mapper->SetInputData(polyData);

#endif


    vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();

    actor->SetMapper(mapper);


 // Store this actor in the widget in order that visualizer can access it

    viz::WidgetAccessor::setProp(*this, actor);


 // Set the color of the widget. This has to be called after WidgetAccessor.

    setColor(color);

}


int main()

{

    help();


 viz::Viz3d myWindow("Creating Widgets");


    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());


    myWindow.showWidget("TRIANGLE", tw);


    myWindow.spin();


 return 0;

}

#endif

cv::Point3_
Template class for 3D points specified by its coordinates x, y and z.
Definition types.hpp:255

cv::Point3_::z
_Tp z
z coordinate of the 3D point
Definition types.hpp:286

cv::Point3_::x
_Tp x
x coordinate of the 3D point
Definition types.hpp:284

cv::Point3_::y
_Tp y
y coordinate of the 3D point
Definition types.hpp:285

cv::viz::Color
This class represents color in BGR order.
Definition types.hpp:64

cv::viz::Viz3d
The Viz3d class represents a 3D visualizer window. This class is implicitly shared.
Definition viz3d.hpp:68

cv::viz::Widget3D
Base class of all 3D widgets.
Definition widgets.hpp:182

main
int main(int argc, char *argv[])
Definition highgui_qt.cpp:3

cv
Definition core.hpp:107

std
STL namespace.

viz.hpp

widget_accessor.hpp