VTK系列18_柱体显示与交互

实例18：柱体的交互

#include "vtkAutoInit.h" 
VTK_MODULE_INIT(vtkRenderingOpenGL2);
VTK_MODULE_INIT(vtkInteractionStyle);

#include <vtkSmartPointer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkInteractorStyleTrackballCamera.h>
#include <vtkCylinderSource.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkProperty.h>

int main()
{
	//定义一个vtkCylinderSource类型的对象cylinder
	//vtkCylinderSource主要是生成一个中心在渲染场景原点的柱体，类型为（vtkPolyData)
	vtkSmartPointer<vtkCylinderSource> cylinder = 
		vtkSmartPointer<vtkCylinderSource>::New();
	cylinder->SetHeight( 3.0 );//设置柱体的高
	cylinder->SetRadius( 1.0 );//设置柱体横截面半径
	cylinder->SetResolution( 10 ); //设置柱体横截面的等边多边形的边数

	//将输入的数据转换为几何图元（点、线、多边形）进行渲染
	vtkSmartPointer<vtkPolyDataMapper> cylinderMapper = 
		vtkSmartPointer<vtkPolyDataMapper>::New();
	cylinderMapper->SetInputConnection( cylinder->GetOutputPort() ); 

	vtkSmartPointer<vtkActor> cylinderActor = 
		vtkSmartPointer<vtkActor>::New();
	//设置生成几何图元的Mapper,即连接一个Actor到可视化管线的末端
	cylinderActor->SetMapper( cylinderMapper );
	cylinderActor->GetProperty()->SetColor(1.0, 0.0, 0.0);

	vtkSmartPointer<vtkRenderer> renderer = 
		vtkSmartPointer<vtkRenderer>::New();
	renderer->AddActor( cylinderActor );
	renderer->SetBackground( 1.0, 1.0, 1.0 );

	//将操作系统与VTK渲染引擎连接到一起
	vtkSmartPointer<vtkRenderWindow> renWin = 
		vtkSmartPointer<vtkRenderWindow>::New();
	renWin->AddRenderer( renderer );//加入vtkRenderer对象
	renWin->SetSize( 640, 480 );//设置窗口大小，像素为单位
	renWin->Render();//场景渲染
	renWin->SetWindowName("RenderCylinder");

	//提供平台独立的响应鼠标、键盘和时钟事件的交互机制
	vtkSmartPointer<vtkRenderWindowInteractor> iren = 
		vtkSmartPointer<vtkRenderWindowInteractor>::New();
	iren->SetRenderWindow(renWin);

	//交互器样式的一种，可通过控制相机对物体作旋转、放大、缩小等操作
	vtkSmartPointer<vtkInteractorStyleTrackballCamera> style = 
		vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();
	iren->SetInteractorStyle(style);

	iren->Initialize();
	iren->Start();

	return EXIT_SUCCESS;
}

VTK系列目录：

1 VTK基本概念

2 VTK图像处理

3 VTK图形处理

4 VTK体绘制