RectilinearGrid
Repository source: RectilinearGrid
Description¶
Shows how to create a vtkRectilinearGrid.
Question
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Code¶
RectilinearGrid.cxx
#include <vtkActor.h>
#include <vtkDataSetMapper.h>
#include <vtkDoubleArray.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkProperty.h>
#include <vtkRectilinearGrid.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <iostream>
#include <string>
int main(int, char*[])
{
vtkNew<vtkNamedColors> colors;
// Create a grid
vtkNew<vtkRectilinearGrid> grid;
grid->SetDimensions(2, 3, 1);
vtkNew<vtkDoubleArray> xArray;
xArray->InsertNextValue(0.0);
xArray->InsertNextValue(2.0);
vtkNew<vtkDoubleArray> yArray;
yArray->InsertNextValue(0.0);
yArray->InsertNextValue(1.0);
yArray->InsertNextValue(2.0);
vtkNew<vtkDoubleArray> zArray;
zArray->InsertNextValue(0.0);
grid->SetXCoordinates(xArray);
grid->SetYCoordinates(yArray);
grid->SetZCoordinates(zArray);
std::cout << "There are " << grid->GetNumberOfPoints() << " points."
<< std::endl;
std::cout << "There are " << grid->GetNumberOfCells() << " cells."
<< std::endl;
for (vtkIdType id = 0; id < grid->GetNumberOfPoints(); id++)
{
double p[3];
grid->GetPoint(id, p);
std::cout << "Point " << id << " : (" << p[0] << " , " << p[1] << " , "
<< p[2] << ")" << std::endl;
}
// Create a mapper and actor.
vtkNew<vtkDataSetMapper> mapper;
mapper->SetInputData(grid);
vtkNew<vtkActor> actor;
actor->SetMapper(mapper);
actor->GetProperty()->SetColor(colors->GetColor3d("PeachPuff").GetData());
// Visualize
vtkNew<vtkRenderer> renderer;
vtkNew<vtkRenderWindow> renderWindow;
renderWindow->AddRenderer(renderer);
renderWindow->SetWindowName("RectilinearGrid");
vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
renderWindowInteractor->SetRenderWindow(renderWindow);
renderer->AddActor(actor);
renderer->SetBackground(colors->GetColor3d("SlateGray").GetData());
renderWindow->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
project(RectilinearGrid)
find_package(VTK COMPONENTS
CommonColor
CommonCore
CommonDataModel
InteractionStyle
RenderingContextOpenGL2
RenderingCore
RenderingFreeType
RenderingGL2PSOpenGL2
RenderingOpenGL2
)
if (NOT VTK_FOUND)
message(FATAL_ERROR "RectilinearGrid: Unable to find the VTK build folder.")
endif()
# Prevent a "command line is too long" failure in Windows.
set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
add_executable(RectilinearGrid MACOSX_BUNDLE RectilinearGrid.cxx )
target_link_libraries(RectilinearGrid PRIVATE ${VTK_LIBRARIES}
)
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS RectilinearGrid
MODULES ${VTK_LIBRARIES}
)
Download and Build RectilinearGrid¶
Click here to download RectilinearGrid and its CMakeLists.txt file. Once the tarball RectilinearGrid.tar has been downloaded and extracted,
cd RectilinearGrid/build
If VTK is installed:
cmake ..
If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
cmake -DVTK_DIR:PATH=/home/me/vtk_build ..
Build the project:
make
and run it:
./RectilinearGrid
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.