vtk绘制箭头 c++
时间: 2023-12-16 20:01:27 浏览: 161
vtk是一种用于可视化的开源库,它可以用来绘制各种图形,包括箭头。在vtk中绘制箭头可以通过创建一个箭头源对象,设置箭头的起点、终点和箭头的大小等属性,然后将这个箭头源对象添加到vtk的渲染器中进行显示。
首先,我们需要包含vtk的头文件和命名空间:
```cpp
#include <vtkSmartPointer.h>
#include <vtkArrowSoiurce.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
```
然后创建箭头源对象并设置箭头的属性:
```cpp
vtkSmartPointer<vtkArrowSource> arrowSource = vtkSmartPointer<vtkArrowSource>::New();
arrowSource->SetTipResolution(16);
arrowSource->SetTipLength(0.3);
arrowSource->SetTipRadius(0.1);
arrowSource->SetShaftResolution(16);
arrowSource->SetShaftRadius(0.05);
```
接下来创建渲染器、映射器和演员,并将箭头源对象添加到演员中:
```cpp
vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(arrowSource->GetOutputPort());
vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);
vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
renderer->AddActor(actor);
vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindow->Render();
renderWindowInteractor->Start();
```
通过以上步骤,我们就可以在vtk中绘制出箭头C,并在窗口中显示出来。
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