DisplayQuadraticSurfaces
VTKExamples/Cxx/Visualization/DisplayQuadraticSurfaces
Description
This example demonstrates how to display several types of quadratic surfaces.
Code
DisplayQuadraticSurfaces.cxx
#include <vtkQuadric.h>
#include <vtkSampleFunction.h>
#include <vtkContourFilter.h>
#include <vtkOutlineFilter.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkImageData.h>
#include <vtkSmartPointer.h>
void Other();
void Sphere();
void Cone();
void Ellipsoid();
void Cylinder();
void HyperboloidOneSheet();
void HyperboloidTwoSheets();
void HyperbolicParaboloid();
void EllipticParaboloid();
void PlotFunction(vtkQuadric* quadric, double value);
int main (int, char *[])
{
//Other();
//Sphere();
//Cone();
//Ellipsoid();
//Cylinder();
//HyperboloidOneSheet();
//HyperboloidTwoSheets();
//HyperbolicParaboloid();
EllipticParaboloid();
return 0;
}
void Sphere()
{
// create the quadric function definition
vtkSmartPointer<vtkQuadric> quadric = vtkSmartPointer<vtkQuadric>::New();
quadric->SetCoefficients(1,1,1,0,0,0,0,0,0,0);
// F(x,y,z) = a0*x^2 + a1*y^2 + a2*z^2 + a3*x*y + a4*y*z + a5*x*z + a6*x + a7*y + a8*z + a9
// F(x,y,z) = 1*x^2 + 1*y^2 + 1*z^2
PlotFunction(quadric, 1.0);
}
void EllipticParaboloid()
{
// create the quadric function definition
vtkSmartPointer<vtkQuadric> quadric = vtkSmartPointer<vtkQuadric>::New();
quadric->SetCoefficients(1,1,0,0,0,0,0,0,-1,0);
// F(x,y,z) = a0*x^2 + a1*y^2 + a2*z^2 + a3*x*y + a4*y*z + a5*x*z + a6*x + a7*y + a8*z + a9
// F(x,y,z) = 1*x^2 + 1*y^2
PlotFunction(quadric, 0.0);
}
void HyperbolicParaboloid()
{
// create the quadric function definition
vtkSmartPointer<vtkQuadric> quadric = vtkSmartPointer<vtkQuadric>::New();
quadric->SetCoefficients(1,-1,0,0,0,0,0,0,0,0);
// F(x,y,z) = a0*x^2 + a1*y^2 + a2*z^2 + a3*x*y + a4*y*z + a5*x*z + a6*x + a7*y + a8*z + a9
// F(x,y,z) = 1*x^2 - 1*y^2
PlotFunction(quadric, 1.0);
}
void Cylinder()
{
// create the quadric function definition
vtkSmartPointer<vtkQuadric> quadric = vtkSmartPointer<vtkQuadric>::New();
quadric->SetCoefficients(1,1,0,0,0,0,0,0,0,0);
// F(x,y,z) = a0*x^2 + a1*y^2 + a2*z^2 + a3*x*y + a4*y*z + a5*x*z + a6*x + a7*y + a8*z + a9
// F(x,y,z) = 1*x^2 + 1*y^2
PlotFunction(quadric, 1.0);
}
void HyperboloidOneSheet()
{
// create the quadric function definition
vtkSmartPointer<vtkQuadric> quadric = vtkSmartPointer<vtkQuadric>::New();
quadric->SetCoefficients(1,1,-1,0,0,0,0,0,0,0);
// F(x,y,z) = a0*x^2 + a1*y^2 + a2*z^2 + a3*x*y + a4*y*z + a5*x*z + a6*x + a7*y + a8*z + a9
// F(x,y,z) = 1*x^2 + 1*y^2
PlotFunction(quadric, 1.0);
}
void HyperboloidTwoSheets()
{
// create the quadric function definition
vtkSmartPointer<vtkQuadric> quadric = vtkSmartPointer<vtkQuadric>::New();
quadric->SetCoefficients(1,1,-1,0,0,0,0,0,0,0);
// F(x,y,z) = a0*x^2 + a1*y^2 + a2*z^2 + a3*x*y + a4*y*z + a5*x*z + a6*x + a7*y + a8*z + a9
// F(x,y,z) = 1*x^2 + 1*y^2
PlotFunction(quadric, -1.0);
}
void Ellipsoid()
{
// create the quadric function definition
vtkSmartPointer<vtkQuadric> quadric = vtkSmartPointer<vtkQuadric>::New();
quadric->SetCoefficients(1,1,2,0,0,0,0,0,0,0);
// F(x,y,z) = a0*x^2 + a1*y^2 + a2*z^2 + a3*x*y + a4*y*z + a5*x*z + a6*x + a7*y + a8*z + a9
// F(x,y,z) = 1*x^2 + 1*y^2 + 1*z^2
PlotFunction(quadric, 1.0);
}
void Cone()
{
// create the quadric function definition
vtkSmartPointer<vtkQuadric> quadric = vtkSmartPointer<vtkQuadric>::New();
quadric->SetCoefficients(1,1,-1,0,0,0,0,0,0,0);
// F(x,y,z) = a0*x^2 + a1*y^2 + a2*z^2 + a3*x*y + a4*y*z + a5*x*z + a6*x + a7*y + a8*z + a9
// F(x,y,z) = 1*x^2 + 1*y^2 - 1*z^2
PlotFunction(quadric, 0.0);
}
void Other()
{
// create the quadric function definition
vtkSmartPointer<vtkQuadric> quadric = vtkSmartPointer<vtkQuadric>::New();
quadric->SetCoefficients(.5,1,.2,0,.1,0,0,.2,0,0);
// F(x,y,z) = a0*x^2 + a1*y^2 + a2*z^2 + a3*x*y + a4*y*z + a5*x*z + a6*x + a7*y + a8*z + a9
// F(x,y,z) = 0.5*x^2 + 1*y^2 + 0.2*z^2 + 0*x*y + 0.1*y*z + 0*x*z + 0*x + 0.2*y + 0*z + 0
PlotFunction(quadric, 1.0);
}
void PlotFunction(vtkQuadric* quadric, double value)
{
// sample the quadric function
vtkSmartPointer<vtkSampleFunction> sample = vtkSmartPointer<vtkSampleFunction>::New();
sample->SetSampleDimensions(50,50,50);
sample->SetImplicitFunction(quadric);
//double xmin = 0, xmax=1, ymin=0, ymax=1, zmin=0, zmax=1;
double xmin = -10, xmax=11, ymin=-10, ymax=10, zmin=-10, zmax=10;
sample->SetModelBounds(xmin, xmax, ymin, ymax, zmin, zmax);
// Create five surfaces F(x,y,z) = constant between range specified
/*
vtkContourFilter *contours = vtkContourFilter::New();
contours->SetInput(sample->GetOutput());
contours->GenerateValues(5, 0.0, 1.2);
*/
//create the 0 isosurface
vtkSmartPointer<vtkContourFilter> contours = vtkSmartPointer<vtkContourFilter>::New();
contours->SetInputConnection(sample->GetOutputPort());
contours->GenerateValues(1, value, value);
// map the contours to graphical primitives
vtkSmartPointer<vtkPolyDataMapper> contourMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
contourMapper->SetInputConnection(contours->GetOutputPort());
contourMapper->SetScalarRange(0.0, 1.2);
// create an actor for the contours
vtkSmartPointer<vtkActor> contourActor = vtkSmartPointer<vtkActor>::New();
contourActor->SetMapper(contourMapper);
// -- create a box around the function to indicate the sampling volume --
// create outline
vtkSmartPointer<vtkOutlineFilter> outline = vtkSmartPointer<vtkOutlineFilter>::New();
outline->SetInputConnection(sample->GetOutputPort());
// map it to graphics primitives
vtkSmartPointer<vtkPolyDataMapper> outlineMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
outlineMapper->SetInputConnection(outline->GetOutputPort());
// create an actor for it
vtkSmartPointer<vtkActor> outlineActor = vtkSmartPointer<vtkActor>::New();
outlineActor->SetMapper(outlineMapper);
outlineActor->GetProperty()->SetColor(0,0,0);
// setup the window
vtkSmartPointer<vtkRenderer> ren1 = vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renWin = vtkSmartPointer<vtkRenderWindow>::New();
renWin->AddRenderer(ren1);
vtkSmartPointer<vtkRenderWindowInteractor> iren = vtkSmartPointer<vtkRenderWindowInteractor>::New();
iren->SetRenderWindow(renWin);
// add the actors to the scene
ren1->AddActor(contourActor);
ren1->AddActor(outlineActor);
ren1->SetBackground(1,1,1); // Background color white
// render and interact
renWin->Render();
iren->Start();
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(DisplayQuadraticSurfaces)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(DisplayQuadraticSurfaces MACOSX_BUNDLE DisplayQuadraticSurfaces.cxx)
target_link_libraries(DisplayQuadraticSurfaces ${VTK_LIBRARIES})
Download and Build DisplayQuadraticSurfaces
Click here to download DisplayQuadraticSurfaces and its CMakeLists.txt file. Once the tarball DisplayQuadraticSurfaces.tar has been downloaded and extracted,
cd DisplayQuadraticSurfaces/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:
./DisplayQuadraticSurfaces
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.