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/*=========================================================================
Program: Visualization Toolkit
Module: Cube.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// This example shows how to manually create vtkPolyData.
// For a python version, please see:
// [Cube](https://lorensen.github.io/VTKExamples/site/Python/DataManipulation/Cube/)
#include <vtkActor.h>
#include <vtkCamera.h>
#include <vtkCellArray.h>
#include <vtkFloatArray.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPointData.h>
#include <vtkPoints.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <array>
int main()
{
vtkNew<vtkNamedColors> colors;
std::array<std::array<double, 3>, 8> pts = { { { { 0, 0, 0 } }, { { 1, 0, 0 } }, { { 1, 1, 0 } },
{ { 0, 1, 0 } }, { { 0, 0, 1 } }, { { 1, 0, 1 } }, { { 1, 1, 1 } }, { { 0, 1, 1 } } } };
// The ordering of the corner points on each face.
std::array<std::array<vtkIdType, 4>, 6> ordering = { { { { 0, 1, 2, 3 } }, { { 4, 5, 6, 7 } },
{ { 0, 1, 5, 4 } }, { { 1, 2, 6, 5 } }, { { 2, 3, 7, 6 } }, { { 3, 0, 4, 7 } } } };
// We'll create the building blocks of polydata including data attributes.
vtkNew<vtkPolyData> cube;
vtkNew<vtkPoints> points;
vtkNew<vtkCellArray> polys;
vtkNew<vtkFloatArray> scalars;
// Load the point, cell, and data attributes.
for (auto i = 0ul; i < pts.size(); ++i)
{
points->InsertPoint(i, pts[i].data());
scalars->InsertTuple1(i, i);
}
for (auto&& i : ordering)
{
polys->InsertNextCell(vtkIdType(i.size()), i.data());
}
// We now assign the pieces to the vtkPolyData.
cube->SetPoints(points);
cube->SetPolys(polys);
cube->GetPointData()->SetScalars(scalars);
// Now we'll look at it.
vtkNew<vtkPolyDataMapper> cubeMapper;
cubeMapper->SetInputData(cube);
cubeMapper->SetScalarRange(cube->GetScalarRange());
vtkNew<vtkActor> cubeActor;
cubeActor->SetMapper(cubeMapper);
// The usual rendering stuff.
vtkNew<vtkCamera> camera;
camera->SetPosition(1, 1, 1);
camera->SetFocalPoint(0, 0, 0);
vtkNew<vtkRenderer> renderer;
vtkNew<vtkRenderWindow> renWin;
renWin->AddRenderer(renderer);
vtkNew<vtkRenderWindowInteractor> iren;
iren->SetRenderWindow(renWin);
renderer->AddActor(cubeActor);
renderer->SetActiveCamera(camera);
renderer->ResetCamera();
renderer->SetBackground(colors->GetColor3d("Cornsilk").GetData());
renWin->SetSize(600, 600);
// interact with data
renWin->Render();
iren->Start();
return EXIT_SUCCESS;
}
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