VTK-三维交互之绝对坐标系

#include "thQVTKOpenGLNativeWidget.h" #include <QApplication> #include <QDesktopWidget> #include <QOpenGLContext> #include <QOpenGLFramebufferObject> #include <QOpenGLFunctions> #include <QOpenGLFunctions_3_2_Core> #include <QOpenGLTexture> #include <QPointer> #include <QScopedValueRollback> #include <QtDebug> #include "vtkAxesActor.h" #include "vtkProperty.h" #include "vtkProperty2D.h" #include "vtkTextProperty.h" #include "vtkCaptionActor2D.h" #include <vtkRendererCollection.h> #include <vtkRenderer.h> #include "vtkAnnotatedCubeActor.h" #include "vtkMapper.h" #include "vtkPropAssembly.h" #include "vtkPlaneSource.h" #include "vtkTransform.h" #include "vtkPolyDataMapper.h" #include "vtkCamera.h" #include "QVTKInteractor.h" #include "QVTKInteractorAdapter.h" #include "QVTKRenderWindowAdapter.h" #include "vtkCommand.h" #include "vtkGenericOpenGLRenderWindow.h" #include "vtkNew.h" #include "vtkObjectFactory.h" #include "vtkOpenGLState.h" #include "thinteractorstyletrackballcamera.h" //----------------------------------------------------------------------------- thQVTKOpenGLNativeWidget::thQVTKOpenGLNativeWidget(QWidget* parentWdg, Qt::WindowFlags f) : thQVTKOpenGLNativeWidget( vtkSmartPointer<vtkGenericOpenGLRenderWindow>::New().GetPointer(), parentWdg, f) { } //----------------------------------------------------------------------------- thQVTKOpenGLNativeWidget::thQVTKOpenGLNativeWidget( vtkGenericOpenGLRenderWindow* renderWin, QWidget* parentWdg, Qt::WindowFlags f) : Superclass(parentWdg, f) , RenderWindow(nullptr) , m_axesWidget(nullptr) , RenderWindowAdapter(nullptr) , EnableHiDPI(true) , UnscaledDPI(72) , DefaultCursor(QCursor(Qt::ArrowCursor)) { // default to strong focus this->setFocusPolicy(Qt::StrongFocus); this->setUpdateBehavior(QOpenGLWidget::NoPartialUpdate); this->setMouseTracking(true); // we use `QOpenGLWidget::resized` instead of `resizeEvent` or `resizeGL` as // an indicator to resize our internal buffer size. This is done, since in // addition to widget resize, `resized` gets fired when screen is changed // which causes devicePixelRatio changes. this->connect(this, SIGNAL(resized()), SLOT(updateSize())); this->setRenderWindow(renderWin); m_viewType = zxViewerType::TOP; this->setViewerType(zxViewerType::ISO); // enable qt gesture events this->grabGesture(Qt::PinchGesture); this->grabGesture(Qt::PanGesture); this->grabGesture(Qt::TapGesture); this->grabGesture(Qt::TapAndHoldGesture); this->grabGesture(Qt::SwipeGesture); } //----------------------------------------------------------------------------- thQVTKOpenGLNativeWidget::~thQVTKOpenGLNativeWidget() { this->makeCurrent(); this->cleanupContext(); if (m_axesWidget != NULL) { m_axesWidget->Off(); m_axesWidget->Delete(); m_axesWidget = NULL; } } //----------------------------------------------------------------------------- void thQVTKOpenGLNativeWidget::setRenderWindow(vtkRenderWindow* win) { auto gwin = vtkGenericOpenGLRenderWindow::SafeDownCast(win); if (win != nullptr && gwin == nullptr) { qDebug() << "QVTKOpenGLNativeWidget requires a `vtkGenericOpenGLRenderWindow`. `" << win->GetClassName() << "` is not supported."; } this->setRenderWindow(gwin); } //----------------------------------------------------------------------------- void thQVTKOpenGLNativeWidget::setRenderWindow(vtkGenericOpenGLRenderWindow* win) { if (this->RenderWindow == win) { return; } // this will release all OpenGL resources associated with the old render // window, if any. if (this->RenderWindowAdapter) { this->makeCurrent(); this->RenderWindowAdapter.reset(nullptr); } this->RenderWindow = win; if (this->RenderWindow) { this->RenderWindow->SetReadyForRendering(false); // if an interactor wasn't provided, we'll make one by default if (!this->RenderWindow->GetInteractor()) { // create a default interactor vtkNew<QVTKInteractor> iren; // iren->SetUseTDx(this->UseTDx); this->RenderWindow->SetInteractor(iren); iren->Initialize(); // now set the default style vtkNew<thInteractorStyleTrackballCamera> style; iren->SetInteractorStyle(style); setAxesSystem(iren); setReferenceAxesSystem(); } if (this->isValid()) { // this typically means that the render window is being changed after the // QVTKOpenGLNativeWidget has initialized itself in a previous update // pass, so we emulate the steps to ensure that the new vtkRenderWindow is // brought to the same state (minus the actual render). this->makeCurrent(); this->initializeGL(); this->updateSize(); } } } //----------------------------------------------------------------------------- vtkRenderWindow* thQVTKOpenGLNativeWidget::renderWindow() const { return this->RenderWindow; } //----------------------------------------------------------------------------- QVTKInteractor* thQVTKOpenGLNativeWidget::interactor() const { return this->RenderWindow ? QVTKInteractor::SafeDownCast(this->RenderWindow->GetInteractor()) : nullptr; } //----------------------------------------------------------------------------- QSurfaceFormat thQVTKOpenGLNativeWidget::defaultFormat(bool stereo_capable) { return QVTKRenderWindowAdapter::defaultFormat(stereo_capable); } //----------------------------------------------------------------------------- void thQVTKOpenGLNativeWidget::setEnableHiDPI(bool enable) { this->EnableHiDPI = enable; if (this->RenderWindowAdapter) { this->RenderWindowAdapter->setEnableHiDPI(enable); } } //----------------------------------------------------------------------------- void thQVTKOpenGLNativeWidget::setUnscaledDPI(int dpi) { this->UnscaledDPI = dpi; if (this->RenderWindowAdapter) { this->RenderWindowAdapter->setUnscaledDPI(dpi); } } //----------------------------------------------------------------------------- void thQVTKOpenGLNativeWidget::setDefaultCursor(const QCursor& cursor) { this->DefaultCursor = cursor; if (this->RenderWindowAdapter) { this->RenderWindowAdapter->setDefaultCursor(cursor); } } void thQVTKOpenGLNativeWidget::setAxesSystem(vtkRenderWindowInteractor* iren) { if (!iren) { return; } if (this->RenderWindow->GetRenderers()->GetNumberOfItems() == 0) { this->RenderWindow->AddRenderer(vtkRenderer::New()); //m_window->interactor()->Enable(); } if (m_axesWidget == nullptr) { m_axesWidget = vtkOrientationMarkerWidget::New(); vtkSmartPointer<vtkAnnotatedCubeActor> cube = vtkSmartPointer<vtkAnnotatedCubeActor>::New(); cube->SetFaceTextScale(0.65); cube->GetCubeProperty()->SetColor(0.9, 0.9, 0.9); cube->GetTextEdgesProperty()->SetLineWidth(1); cube->GetTextEdgesProperty()->SetDiffuse(0); cube->GetTextEdgesProperty()->SetAmbient(1); cube->GetTextEdgesProperty()->SetColor(0.2400, 0.2400, 0.2400); vtkMapper::SetResolveCoincidentTopologyToPolygonOffset(); cube->SetXPlusFaceText("L");//左到右 cube->SetXMinusFaceText("R"); cube->SetYPlusFaceText("P");//前到后 cube->SetYMinusFaceText("A"); cube->SetZPlusFaceText("S");//下到上 cube->SetZMinusFaceText("I"); cube->GetXPlus