RibbonFilter
VTKExamples/Cxx/PolyData/RibbonFilter
Description
This example demonstrates how to draw a flat surface (a ribbon) along a line.
Code
RibbonFilter.cxx
#include <vtkVersion.h>
#include <vtkSmartPointer.h>
#include <vtkActor.h>
#include <vtkCamera.h>
#include <vtkCellArray.h>
#include <vtkMath.h>
#include <vtkLine.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 *[])
{
// Spiral parameters
unsigned int nV = 256; // No. of vertices
double vX, vY, vZ;
double rS = 2; // Spiral radius
unsigned int nCyc = 3; // No. of spiral cycles
double h = 10; // Height
unsigned int i;
// Create points and cells for a spiral
vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
for(i = 0; i < nV; i++)
{
// Spiral coordinates
vX = rS * cos(2 * vtkMath::Pi() * nCyc * i / (nV - 1));
vY = rS * sin(2 * vtkMath::Pi() * nCyc * i / (nV - 1));
vZ = h * i / nV;
points->InsertPoint(i, vX, vY, vZ);
}
vtkSmartPointer<vtkCellArray> lines =
vtkSmartPointer<vtkCellArray>::New();
lines->InsertNextCell(nV);
for (i = 0; i < nV; i++)
{
lines->InsertCellPoint(i);
}
vtkSmartPointer<vtkPolyData> polyData =
vtkSmartPointer<vtkPolyData>::New();
polyData->SetPoints(points);
polyData->SetLines(lines);
// Create a mapper and actor
vtkSmartPointer<vtkPolyDataMapper> lineMapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
#if VTK_MAJOR_VERSION <= 5
lineMapper->SetInput(polyData);
#else
lineMapper->SetInputData(polyData);
#endif
vtkSmartPointer<vtkActor> lineActor =
vtkSmartPointer<vtkActor>::New();
lineActor->SetMapper(lineMapper);
lineActor->GetProperty()->SetColor(.8, .4, .2);
lineActor->GetProperty()->SetLineWidth(3);
// Create a ribbon around the line
vtkSmartPointer<vtkRibbonFilter> ribbonFilter =
vtkSmartPointer<vtkRibbonFilter>::New();
#if VTK_MAJOR_VERSION <= 5
ribbonFilter->SetInput(polyData);
#else
ribbonFilter->SetInputData(polyData);
#endif
ribbonFilter->SetWidth(.4);
// Create a mapper and actor
vtkSmartPointer<vtkPolyDataMapper> ribbonMapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
ribbonMapper->SetInputConnection(ribbonFilter->GetOutputPort());
vtkSmartPointer<vtkActor> ribbonActor =
vtkSmartPointer<vtkActor>::New();
ribbonActor->SetMapper(ribbonMapper);
// Create a renderer, render window, and interactor
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);
// Add the actor to the scene
renderer->AddActor(ribbonActor);
renderer->AddActor(lineActor);
// Render and interact
renderer->SetBackground(.2, .3, .4);
// 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 2.8)
PROJECT(RibbonFilter)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(RibbonFilter MACOSX_BUNDLE RibbonFilter.cxx)
target_link_libraries(RibbonFilter ${VTK_LIBRARIES})
Download and Build RibbonFilter
Click here to download RibbonFilter and its CMakeLists.txt file. Once the tarball RibbonFilter.tar has been downloaded and extracted,
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 PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.