我正在研究Qt(4.7.4)项目,需要在2D和3D坐标系中绘制数据。我一直在研究vtk 6.1,因为它看起来非常强大,我还需要在稍后的时间点可视化图像数据。我基本上得到了二维图,但我仍然无法用3D绘制数据。
这是我尝试的内容:我正在使用以下一段代码,我从vtk的一个测试(Charts / Core / Testing / Cxx / TestSurfacePlot.cxx)中获取。我添加的唯一内容是我在GUI中使用的QVTKWidget及其交互器:
QVTKWidget vtkWidget;
vtkNew<vtkChartXYZ> chart;
vtkNew<vtkPlotSurface> plot;
vtkNew<vtkContextView> view;
view->GetRenderWindow()->SetSize(400, 300);
vtkWidget.SetRenderWindow(view->GetRenderWindow());
view->GetScene()->AddItem(chart.GetPointer());
chart->SetGeometry(vtkRectf(75.0, 20.0, 250, 260));
// Create a surface
vtkNew<vtkTable> table;
float numPoints = 70;
float inc = 9.424778 / (numPoints - 1);
for (float i = 0; i < numPoints; ++i)
{
vtkNew<vtkFloatArray> arr;
table->AddColumn(arr.GetPointer());
}
table->SetNumberOfRows(numPoints);
for (float i = 0; i < numPoints; ++i)
{
float x = i * inc;
for (float j = 0; j < numPoints; ++j)
{
float y = j * inc;
table->SetValue(i, j, sin(sqrt(x*x + y*y)));
}
}
// Set up the surface plot we wish to visualize and add it to the chart.
plot->SetXRange(0, 9.424778);
plot->SetYRange(0, 9.424778);
plot->SetInputData(table.GetPointer());
chart->AddPlot(plot.GetPointer());
view->GetRenderWindow()->SetMultiSamples(0);
view->SetInteractor(vtkWidget.GetInteractor());
view->GetInteractor()->Initialize();
view->GetRenderWindow()->Render();
现在,这会产生一个情节,但我既不能与它互动,也不会看起来像3D。我想做一些基本的东西,如缩放,平移或旋转一个枢轴。我想到的一些问题是:
答案 0 :(得分:1)
以下代码对我有用。无需显式分配交互器,因为QVTKWidget已经处理了这个问题。
QVTKWidget vtkWidget;
vtkSmartPointer<vtkContextView> view = vtkSmartPointer<vtkContextView>::New();
vtkSmartPointer<vtkChartXYZ> chart = vtkSmartPointer<vtkChartXYZ>::New();
// Create a surface
vtkSmartPointer<vtkTable> table = vtkSmartPointer<vtkTable>::New();
float numPoints = 70;
float inc = 9.424778 / (numPoints - 1);
for (float i = 0; i < numPoints; ++i)
{
vtkSmartPointer<vtkFloatArray> arr = vtkSmartPointer<vtkFloatArray>::New();
table->AddColumn(arr.GetPointer());
}
table->SetNumberOfRows(numPoints);
for (float i = 0; i < numPoints; ++i)
{
float x = i * inc;
for (float j = 0; j < numPoints; ++j)
{
float y = j * inc;
table->SetValue(i, j, sin(sqrt(x*x + y*y)));
}
}
view->SetRenderWindow(vtkWidget.GetRenderWindow());
chart->SetGeometry(vtkRectf(200.0, 200.0, 300, 300));
view->GetScene()->AddItem(chart.GetPointer());
vtkSmartPointer<vtkPlotSurface> plot = vtkSmartPointer<vtkPlotSurface>::New();
// Set up the surface plot we wish to visualize and add it to the chart.
plot->SetXRange(0, 10.0);
plot->SetYRange(0, 10.0);
plot->SetInputData(table.GetPointer());
chart->AddPlot(plot.GetPointer());
view->GetRenderWindow()->SetMultiSamples(0);
view->GetRenderWindow()->Render();
答案 1 :(得分:0)
您可能需要阅读vtkRenderViewBase
中的详细说明QVTKWidget *widget = new QVTKWidget;
vtkContextView *view = vtkContextView::New();
view->SetInteractor(widget->GetInteractor());
widget->SetRenderWindow(view->GetRenderWindow());