VTK 标注类Widget 文字标注 vtkCaptionWidget

目录

Part1: 简介

Part2: 效果

 Part3: example

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Part1: 简介

vtkCaptionWidget:用一个带线框及箭头的文本信息来标注某一对象；

在可视化程序中，经常会对某个对象做一些标注说明；

如，在医学图像诊断中，常常会手动标注出被诊断为肿瘤的区域或者其他病变区域，并用文字进行标注。

Part2: 效果

vtkCaptionWidget 如下表所示

 也可以给它加个中心点；

 Part3: example

#include "vtkSmartPointer.h"
#include "vtkObjectFactory.h"
#include "vtkRenderWindow.h"
#include "vtkGenericRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkActor.h"
 
#include "vtkDICOMImageReader.h"
#include "vtkImageViewer2.h"
#include "vtkInteractorStyleImage.h"
 
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int main(int argc, char* argv[])
{
 
	auto reader = vtkSmartPointer::New();
	reader->SetDirectoryName("D:/dicom");
	reader->Update();
 
	auto imageViewer = vtkSmartPointer::New();
	imageViewer->SetInputConnection(reader->GetOutputPort());
 
	auto interactor = vtkSmartPointer::New();
	interactor->SetRenderWindow(imageViewer->GetRenderWindow());
	imageViewer->SetupInteractor(interactor);
	imageViewer->SetSize(400, 400);
	imageViewer->SetColorLevel(211);
	imageViewer->SetColorWindow(2470);
	imageViewer->SetSliceOrientationToXY();
	imageViewer->GetRenderer()->SetBackground(0, 0, 0);
 
 
	vtkSmartPointer captionWidget =
		vtkSmartPointer::New();
	captionWidget->SetInteractor(interactor);
 
	captionWidget->GetCaptionActor2D();
 
	vtkSmartPointer captionRepresentation =
		vtkSmartPointer::New();
	captionRepresentation->GetCaptionActor2D()->SetCaption("VTK Caption Test");
	captionRepresentation->SetHandleSize(20);
	//captionRepresentation->GetCaptionActor2D()->SetBorder(false);
	captionRepresentation->GetCaptionActor2D()->GetTextActor()->GetTextProperty()->SetColor(1, 0, 0);
	captionRepresentation->GetCaptionActor2D()->GetTextActor()->GetTextProperty()->SetVerticalJustificationToCentered();
 
	double pos[3] = { 100,100, 10};
	captionRepresentation->SetAnchorPosition(pos);
	//captionWidget->SetCaptionActor2D(captionRepresentation->GetCaptionActor2D());
	captionWidget->SetRepresentation(captionRepresentation);
	captionWidget->On();
 
	imageViewer->Render();
	imageViewer->GetRenderer()->ResetCamera();
	imageViewer->Render();
 
	//memcpy(style->bound, captionWidget->GetRepresentation()->GetBounds(), sizeof(double) * 6);
	interactor->Start();
 
	return EXIT_SUCCESS;
}