QObjectPicker 不适用于自定义几何网格和渲染器

Question

我已经设置了一个简单的3D场景，其中包含自定义的QGeometryRenderer和QGeometry。自定义 QGeometry 是从层文件加载的。

class ColorMeshGeometry : public Qt3DRender::QGeometry
{
  Q_OBJECT
public:
  ColorMeshGeometry(QString meshFile, ColorMeshRenderer *parent);
  ~ColorMeshGeometry();
  void GeometryCenter(QVector3D* center);
};
class ColorMeshRenderer : public Qt3DRender::QGeometryRenderer
{
  ColorMeshGeometry* m_geometry;
  Q_OBJECT
public:
  explicit ColorMeshRenderer(QString meshFile, Qt3DCore::QNode *parent = 0)
  {
    m_geometry = new ColorMeshGeometry(meshFile, this);
    setGeometry(m_geometry);
  }
  ~ColorMeshRenderer();
  void ViewCenter(QVector3D* center);
};

这是设置这一切的代码：

uto view = new Qt3DExtras::Qt3DWindow();
auto container = createWindowContainer(view, this);
auto rootEntity = new Qt3DCore::QEntity();
ColorMeshRenderer* mesh = new ColorMeshRenderer(filename, rootEntity);
view->defaultFrameGraph()->setClearColor(QColor(QRgb(0x111111)));
view->camera()->lens()->setPerspectiveProjection(45.0f, view->width()/view->height(), 0.01f, 100000.0f);
view->camera()->setPosition(QVector3D(0.f, -512.f, 500.0f));
view->camera()->setViewCenter(QVector3D(0, 0, 0));
auto material = new Qt3DExtras::QPerVertexColorMaterial(rootEntity);
auto picker = new Qt3DRender::QObjectPicker(rootEntity);
picker->setHoverEnabled(false);
picker->setDragEnabled(false);
auto plyEntity = new Qt3DCore::QEntity(rootEntity);
plyEntity->addComponent(mesh);
plyEntity->addComponent(material);
plyEntity->addComponent(picker);
connect(picker, &Qt3DRender::QObjectPicker::pressed, this, &ViewerWidget::picker_Clicked);
Qt3DExtras::QOrbitCameraController *camController = new Qt3DExtras::QOrbitCameraController(rootEntity);
camController->setCamera(view->camera());
view->setRootEntity(rootEntity);

QObjectPicker：:p ressed 事件永远不会触发。如果我改用 Qt3DExtras：：QTorusMesh，则会触发按下的事件。QObjectPicker还需要实现什么才能使用自定义网格？

编辑：

完整的示例代码可以在这里找到。

Answer 1

对此的修复最终是透视投影。该项目的后窗格最终走得很远，修复是：

view->camera()->lens()->setPerspectiveProjection(45.0f, view->width()/view->height(), 0.01f, 5000.0f);