vtk显示属性、窗口以及交互设置

来源：互联网发布：建筑企业财务报表数据编辑：程序博客网时间：2024/04/29 23:00

在上篇简单的cone模型显示的基础上，本篇blog继续讲解与模型显示属性、窗口显示以及交互方式相关的例子。

1. 模型显示属性设置

通过给actor设置颜色来改变模型的颜色显示，通过property类，可以进一步设置模型显示的反射光、高光、环境光等属性的设置。

#include "vtkConeSource.h"#include "vtkPolyDataMapper.h"#include "vtkRenderWindow.h"#include "vtkCamera.h"#include "vtkActor.h"#include "vtkRenderer.h"#include "vtkProperty.h"int main(){  vtkConeSource *cone = vtkConeSource::New();  cone->SetHeight( 3.0 );  cone->SetRadius( 1.0 );  cone->SetResolution( 10 );    vtkPolyDataMapper *coneMapper = vtkPolyDataMapper::New();  coneMapper->SetInputConnection( cone->GetOutputPort() );  vtkActor *coneActor = vtkActor::New();  coneActor->SetMapper( coneMapper );

  /* s设置模型显示的属性 */  coneActor->GetProperty()->SetColor(0.2, 0.63, 0.79);   //设置模型显示的颜色  coneActor->GetProperty()->SetDiffuse(0.7);             //设置散射系数

  coneActor->GetProperty()->SetSpecular(0.4);            //设置高光系数  coneActor->GetProperty()->SetSpecularPower(20);        //设置高光的比例参数，具体参数设置可以参加vtk源码的介绍或者phong模型

  //通过新建property对象，实现模型显示颜色的改变  vtkProperty *property = vtkProperty::New();  property->SetColor(1.0, 0.3882, 0.2784);  property->SetDiffuse(0.7);  property->SetSpecular(0.4);  property->SetSpecularPower(20); //添加模型显示属性来显示模型  vtkActor *coneActor2 = vtkActor::New();  coneActor2->SetMapper(coneMapper);  coneActor2->GetProperty()->SetColor(0.2, 0.63, 0.79);  coneActor2->SetProperty(property);  coneActor2->SetPosition(0, 2, 0);  //设置模型显示的位置  vtkRenderer *ren1= vtkRenderer::New();  ren1->AddActor( coneActor );  ren1->AddActor( coneActor2 );  ren1->SetBackground( 0.1, 0.2, 0.4 );  vtkRenderWindow *renWin = vtkRenderWindow::New();  renWin->AddRenderer( ren1 );  renWin->SetSize( 300, 300 );  int i;  for (i = 0; i < 360; ++i)    {    // render the image    renWin->Render();    // rotate the active camera by one degree    ren1->GetActiveCamera()->Azimuth( 1 );    }    cone->Delete();  coneMapper->Delete();  coneActor->Delete();  property->Delete();  coneActor2->Delete();  ren1->Delete();  renWin->Delete();  return 0;}

2. 窗口显示

vtkrender可以控制场景在窗口中显示的位置，从而能够方便的实现多窗口显示。

#include "vtkConeSource.h"#include "vtkPolyDataMapper.h"#include "vtkRenderWindow.h"#include "vtkCamera.h"#include "vtkActor.h"#include "vtkRenderer.h"int main(){  vtkConeSource *cone = vtkConeSource::New();  cone->SetHeight( 3.0 );  cone->SetRadius( 1.0 );  cone->SetResolution( 10 );    vtkPolyDataMapper *coneMapper = vtkPolyDataMapper::New();  coneMapper->SetInputConnection( cone->GetOutputPort() );  vtkActor *coneActor = vtkActor::New();  coneActor->SetMapper( coneMapper );  vtkRenderer *ren1= vtkRenderer::New();  ren1->AddActor( coneActor );  ren1->SetBackground( 0.1, 0.2, 0.4 );  ren1->SetViewport(0.0, 0.0, 0.5, 1.0);  //设置view显示的位置  vtkRenderer *ren2= vtkRenderer::New();  ren2->AddActor( coneActor );  ren2->SetBackground( 0.2, 0.3, 0.5 );  ren2->SetViewport(0.5, 0.0, 1.0, 1.0);   //设置view显示的位置  vtkRenderWindow *renWin = vtkRenderWindow::New();  renWin->AddRenderer( ren1 );  renWin->AddRenderer( ren2 );  renWin->SetSize( 600, 300 );

  ren1->ResetCamera();  ren1->GetActiveCamera()->Azimuth(90);  int i;  for (i = 0; i < 360; ++i)    {    // render the image    renWin->Render();    // rotate the active camera by one degree    ren1->GetActiveCamera()->Azimuth( 1 );    ren2->GetActiveCamera()->Azimuth( 1 );    }    cone->Delete();  coneMapper->Delete();  coneActor->Delete();  ren1->Delete();  ren2->Delete();  renWin->Delete();  return 0;}

3. 交互设置

vtkRenderWindowInteractor能够支持用户的交互，vtkInteractorStyleTrackballCamera则为其中的一种交互方式。

#include "vtkConeSource.h"#include "vtkPolyDataMapper.h"#include "vtkRenderWindow.h"#include "vtkRenderWindowInteractor.h"#include "vtkCamera.h"#include "vtkActor.h"#include "vtkRenderer.h"#include "vtkInteractorStyleTrackballCamera.h"int main(){  vtkConeSource *cone = vtkConeSource::New();  cone->SetHeight( 3.0 );  cone->SetRadius( 1.0 );  cone->SetResolution( 10 );    vtkPolyDataMapper *coneMapper = vtkPolyDataMapper::New();  coneMapper->SetInputConnection( cone->GetOutputPort() );  vtkActor *coneActor = vtkActor::New();  coneActor->SetMapper( coneMapper );  vtkRenderer *ren1= vtkRenderer::New();  ren1->AddActor( coneActor );  ren1->SetBackground( 0.1, 0.2, 0.4 );

  vtkRenderWindow *renWin = vtkRenderWindow::New();  renWin->AddRenderer( ren1 );  renWin->SetSize( 300, 300 );  //设置交互  vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();  iren->SetRenderWindow(renWin);  //设置交互方式  vtkInteractorStyleTrackballCamera *style =     vtkInteractorStyleTrackballCamera::New();  iren->SetInteractorStyle(style);

 //初始化和开始交互  iren->Initialize();  iren->Start();    cone->Delete();  coneMapper->Delete();  coneActor->Delete();  ren1->Delete();  renWin->Delete();  iren->Delete();  style->Delete();  return 0;}

显示结果：

鼠标交互（左键旋转，中键移动，右键缩放）

键盘交互（s面片显示，w网格显示........）

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