ColorGlyphs
VTKExamples/Cxx/Visualization/ColorGlyphs
Description
This example creates a red, green, and blue cube.
Code
ColorGlyphs.cxx
#include <vtkVersion.h>
#include <vtkSmartPointer.h>
#include <vtkPointData.h>
#include <vtkCubeSource.h>
#include <vtkPolyData.h>
#include <vtkPoints.h>
#include <vtkGlyph3D.h>
#include <vtkCellArray.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkUnsignedCharArray.h>
// For compatibility with new VTK generic data arrays
#ifdef vtkGenericDataArray_h
#define InsertNextTupleValue InsertNextTypedTuple
#endif
int main(int, char *[])
{
// Create points
vtkSmartPointer<vtkPoints> points =
vtkSmartPointer<vtkPoints>::New();
points->InsertNextPoint(0,0,0);
points->InsertNextPoint(5,0,0);
points->InsertNextPoint(10,0,0);
// Setup scales. This can also be an Int array
// char is used since it takes the least memory
vtkSmartPointer<vtkUnsignedCharArray> colors =
vtkSmartPointer<vtkUnsignedCharArray>::New();
colors->SetName("colors");
colors->SetNumberOfComponents(3);
unsigned char r[3] = {255,0,0};
unsigned char g[3] = {0,255,0};
unsigned char b[3] = {0,0,255};
colors->InsertNextTupleValue(r);
colors->InsertNextTupleValue(g);
colors->InsertNextTupleValue(b);
// Combine into a polydata
vtkSmartPointer<vtkPolyData> polydata =
vtkSmartPointer<vtkPolyData>::New();
polydata->SetPoints(points);
polydata->GetPointData()->SetScalars(colors);
// Create anything you want here, we will use a cube for the demo.
vtkSmartPointer<vtkCubeSource> cubeSource =
vtkSmartPointer<vtkCubeSource>::New();
vtkSmartPointer<vtkGlyph3D> glyph3D =
vtkSmartPointer<vtkGlyph3D>::New();
glyph3D->SetColorModeToColorByScalar();
glyph3D->SetSourceConnection(cubeSource->GetOutputPort());
#if VTK_MAJOR_VERSION <= 5
glyph3D->SetInput(polydata);
#else
glyph3D->SetInputData(polydata);
#endif
glyph3D->ScalingOff();
glyph3D->Update();
// Create a mapper and actor
vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(glyph3D->GetOutputPort());
vtkSmartPointer<vtkActor> actor =
vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);
// Visualize
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);
renderer->AddActor(actor);
renderer->SetBackground(1,1,1); // Background color white
renderWindow->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(ColorGlyphs)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(ColorGlyphs MACOSX_BUNDLE ColorGlyphs.cxx)
target_link_libraries(ColorGlyphs ${VTK_LIBRARIES})
Download and Build ColorGlyphs
Click here to download ColorGlyphs and its CMakeLists.txt file. Once the tarball ColorGlyphs.tar has been downloaded and extracted,
cd ColorGlyphs/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:
./ColorGlyphs
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.