vtk入门教程从每个例子讲起，STEP4

/*========================================================================= Program: Visualization Toolkit Module: $RCSfile: Cone4.cxx,v $ Language: C++ Date: $Date: 2002/11/14 21:00:04 $ Version: $Revision: 1.1 $ Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen All rights reserved. See Copyright.txt or http://www.kitware.com/Copyright.htm for details. This software is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the above copyright notice for more information. =========================================================================*/ // // This example demonstrates the creation of multiple actors and the // manipulation of their properties and transformations. It is a // derivative of Cone.tcl, see that example for more information. // // First include the required header files for the VTK classes we are using. #include "vtkConeSource.h" #include "vtkPolyDataMapper.h" #include "vtkRenderWindow.h" #include "vtkCamera.h" #include "vtkActor.h" #include "vtkRenderer.h" #include "vtkProperty.h" int main( int argc, char *argv[] ) { // // Next we create an instance of vtkConeSource and set some of its // properties. The instance of vtkConeSource "cone" is part of a // visualization pipeline (it is a source process object); it produces data // (output type is vtkPolyData) which other filters may process. // vtkConeSource *cone = vtkConeSource::New(); cone->SetHeight( 3.0 ); cone->SetRadius( 1.0 ); cone->SetResolution( 10 ); // // In this example we terminate the pipeline with a mapper process object. // (Intermediate filters such as vtkShrinkPolyData could be inserted in // between the source and the mapper.) We create an instance of // vtkPolyDataMapper to map the polygonal data into graphics primitives. We // connect the output of the cone souece to the input of this mapper. // vtkPolyDataMapper *coneMapper = vtkPolyDataMapper::New(); coneMapper->SetInput( cone->GetOutput() ); // // Create an actor to represent the first cone. The actor's properties are // modified to give it different surface properties. By default, an actor // is create with a property so the GetProperty() method can be used. // vtkActor *coneActor = vtkActor::New(); coneActor->SetMapper( coneMapper ); coneActor->GetProperty()->SetColor(0.2, 0.63, 0.79); coneActor->GetProperty()->SetDiffuse(0.7); coneActor->GetProperty()->SetSpecular(0.4); coneActor->GetProperty()->SetSpecularPower(20); // // Create a property and directly manipulate it. Assign it to the // second actor. // vtkProperty *property = vtkProperty::New(); property->SetColor(1.0, 0.3882, 0.2784); property->SetDiffuse(0.7); property->SetSpecular(0.4); property->SetSpecularPower(20); // // Create a second actor and a property. The property is directly // manipulated and then assigned to the actor. In this way, a single // property can be shared among many actors. Note also that we use the // same mapper as the first actor did. This way we avoid duplicating // geometry, which may save lots of memory if the geoemtry is large. vtkActor *coneActor2 = vtkActor::New(); coneActor2->SetMapper(coneMapper); coneActor2->GetProperty()->SetColor(0.2, 0.63, 0.79); coneActor2->SetProperty(property); coneActor2->SetPosition(0, 2, 0); // // Create the Renderer and assign actors to it. A renderer is like a // viewport. It is part or all of a window on the screen and it is // responsible for drawing the actors it has. We also set the background // color here. // vtkRenderer *ren1= vtkRenderer::New(); ren1->AddActor( coneActor ); ren1->AddActor( coneActor2 ); ren1->SetBackground( 0.1, 0.2, 0.4 ); // // Finally we create the render window which will show up on the screen. // We put our renderer into the render window using AddRenderer. We also // set the size to be 300 pixels by 300. // vtkRenderWindow *renWin = vtkRenderWindow::New(); renWin->AddRenderer( ren1 ); renWin->SetSize( 300, 300 ); // // Now we loop over 360 degreeees and render the cone each time. // int i; for (i = 0; i < 360; ++i) { // render the image renWin->Render(); // rotate the active camera by one degree ren1->GetActiveCamera()->Azimuth( 1 ); } // // Free up any objects we created. All instances in VTK are deleted by // using the Delete() method. // cone->Delete(); coneMapper->Delete(); coneActor->Delete(); property->Delete(); coneActor2->Delete(); ren1->Delete(); renWin->Delete(); return 0; }