# RibbonFilter

Repository source: RibbonFilter

### Description¶

This example demonstrates how to draw a flat surface (a ribbon) along a line.

Other languages

See (Java)

Question

### Code¶

RibbonFilter.cxx

#include <vtkActor.h>
#include <vtkCamera.h>
#include <vtkCellArray.h>
#include <vtkMath.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkRibbonFilter.h>

int main(int, char*[])
{
vtkNew<vtkNamedColors> colors;

// Spiral parameters.
unsigned int nV = 256; // No. of vertices
double rS = 2;         // Spiral radius
unsigned int nCyc = 3; // No. of helical cycles
double h = 10;         // Height

unsigned int i;

// Create points and cells for a helix.
vtkNew<vtkPoints> points;
for (i = 0; i < nV; i++)
{
// Helical coordinates.
auto vX = rS * cos(2 * vtkMath::Pi() * nCyc * i / (nV - 1));
auto vY = rS * sin(2 * vtkMath::Pi() * nCyc * i / (nV - 1));
auto vZ = h * i / nV;
points->InsertPoint(i, vX, vY, vZ);
}

vtkNew<vtkCellArray> lines;
lines->InsertNextCell(nV);
for (i = 0; i < nV; i++)
{
lines->InsertCellPoint(i);
}

vtkNew<vtkPolyData> polyData;
polyData->SetPoints(points);
polyData->SetLines(lines);

// Create a mapper and actor.
vtkNew<vtkPolyDataMapper> lineMapper;
lineMapper->SetInputData(polyData);

vtkNew<vtkActor> lineActor;
lineActor->SetMapper(lineMapper);
lineActor->GetProperty()->SetColor(colors->GetColor3d("Tomato").GetData());
lineActor->GetProperty()->SetLineWidth(3);

// Create a ribbon around the line.
vtkNew<vtkRibbonFilter> ribbonFilter;
ribbonFilter->SetInputData(polyData);
ribbonFilter->SetWidth(.4);

// Create a mapper and actor.
vtkNew<vtkPolyDataMapper> ribbonMapper;
ribbonMapper->SetInputConnection(ribbonFilter->GetOutputPort());

vtkNew<vtkActor> ribbonActor;
ribbonActor->SetMapper(ribbonMapper);
ribbonActor->GetProperty()->SetColor(
colors->GetColor3d("AliceBlue").GetData());

// Create a renderer, render window, and interactor.
vtkNew<vtkRenderer> renderer;

vtkNew<vtkRenderWindow> renderWindow;

vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindow->SetWindowName("RibbonFilter");

// Add the actor to the scene.

// Render and interact.
renderer->SetBackground(colors->GetColor3d("SteelBlue").GetData());

// Generate an interesting view.
renderer->GetActiveCamera()->Azimuth(40);
renderer->GetActiveCamera()->Elevation(30);
renderer->ResetCamera();
renderer->ResetCameraClippingRange();

renderWindow->Render();
renderWindowInteractor->Start();

return EXIT_SUCCESS;
}


### CMakeLists.txt¶

cmake_minimum_required(VERSION 3.12 FATAL_ERROR)

project(RibbonFilter)

find_package(VTK COMPONENTS
CommonColor
CommonCore
CommonDataModel
FiltersModeling
InteractionStyle
RenderingContextOpenGL2
RenderingCore
RenderingFreeType
RenderingGL2PSOpenGL2
RenderingOpenGL2
)

if (NOT VTK_FOUND)
message(FATAL_ERROR "RibbonFilter: 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.")
target_link_libraries(RibbonFilter PRIVATE ${VTK_LIBRARIES} ) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS RibbonFilter MODULES${VTK_LIBRARIES}
)


cd RibbonFilter/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:

./RibbonFilter


WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.