VTK学习（二）VTK图像创建

最新推荐文章于 2024-09-06 11:37:54 发布

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本文介绍VTK7版本中的图像创建过程，着重讲解相对于VTK5版本中图像参数定义的变化。

VTK7版本中图像创建，其中图像参数定义的方式改变

VTK5

img->SetNumberOfScalarComponents(1);
img->SetScalarTypeToUnsignedChar();
img->AllocateScalars();

VTK7

img->AllocateScalars(VTK_UNSIGNED_CHAR, 1);

#include "vtkAutoInit.h" 
VTK_MODULE_INIT(vtkRenderingOpenGL2); // VTK was built with vtkRenderingOpenGL2
VTK_MODULE_INIT(vtkInteractionStyle);
/**********************************************************************

文件名: 4.1_ReadSeriesImages1.cpp
Copyright (c) 张晓东, 罗火灵. All rights reserved.
更多信息请访问:
http://www.vtkchina.org (VTK中国)
http://blog.youkuaiyun.com/www_doling_net (东灵工作室)

**********************************************************************/



/**********************************************************************

文件名: 4.2_Import3DS.cpp
Copyright (c) 张晓东, 罗火灵. All rights reserved.
更多信息请访问:
http://www.vtkchina.org (VTK中国)
http://blog.youkuaiyun.com/www_doling_net (东灵工作室)

**********************************************************************/


#include <vtkSmartPointer.h>
#include <vtkImageData.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkImageActor.h>
#include <vtkInteractorStyleImage.h>
#include <vtkRenderWindow.h>

int main()
{
	vtkSmartPointer<vtkImageData> img = vtkSmartPointer<vtkImageData>::New();
	img->SetDimensions(16, 16, 1);
#if VTK_MAJOR_VERSION <= 5
	img->SetNumberOfScalarComponents(1);
	img->SetScalarTypeToUnsignedChar();
	img->AllocateScalars();
#else
	img->AllocateScalars(VTK_UNSIGNED_CHAR, 1);
#endif

	unsigned char *ptr = (unsigned char*)img->GetScalarPointer();
	for (int i = 0; i<16 * 16 * 1; i++)
	{
		*ptr++ = i % 256;
	}

	vtkSmartPointer<vtkImageActor> redActor =
		vtkSmartPointer<vtkImageActor>::New();
	redActor->SetInputData(img); //VTK5的代码为SetInput();

	double redViewport[4] = { 0.0, 0.0, 1.0, 1.0 };

	vtkSmartPointer<vtkRenderer> redRenderer =
		vtkSmartPointer<vtkRenderer>::New();
	redRenderer->SetViewport(redViewport);
	redRenderer->AddActor(redActor);
	redRenderer->ResetCamera();
	redRenderer->SetBackground(1.0, 1.0, 1.0);

	vtkSmartPointer<vtkRenderWindow> renderWindow =
		vtkSmartPointer<vtkRenderWindow>::New();
	renderWindow->AddRenderer(redRenderer);
	renderWindow->SetSize(640, 480);
	renderWindow->Render();
	renderWindow->SetWindowName("CreateVTKImageData");

	vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
		vtkSmartPointer<vtkRenderWindowInteractor>::New();
	vtkSmartPointer<vtkInteractorStyleImage> style =
		vtkSmartPointer<vtkInteractorStyleImage>::New();
	renderWindowInteractor->SetInteractorStyle(style);

	renderWindowInteractor->SetRenderWindow(renderWindow);
	renderWindowInteractor->Initialize();
	renderWindowInteractor->Start();

	return EXIT_SUCCESS;
}