Method GetWebGLSceneMetaData

Web/Core/vtkWebApplication.cxx:347–390

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//------------------------------------------------------------------------------
const char* vtkWebApplication::GetWebGLSceneMetaData(vtkRenderWindow* view)
{
  if (!view)
  {
    vtkErrorMacro("No view specified.");
    return nullptr;
  }

  // We use the camera focal point to be the center of rotation
  double centerOfRotation[3];
  vtkCamera* cam = view->GetRenderers()->GetFirstRenderer()->GetActiveCamera();
  cam->GetFocalPoint(centerOfRotation);

  if (this->Internals->ViewWebGLMap.find(view) == this->Internals->ViewWebGLMap.end())
  {
    this->Internals->ViewWebGLMap[view] = vtkSmartPointer<vtkWebGLExporter>::New();
  }

  std::stringstream globalIdAsString;
  globalIdAsString << this->Internals->ObjectIdMap->GetGlobalId(view);

  vtkWebGLExporter* webglExporter = this->Internals->ViewWebGLMap[view];
  webglExporter->parseScene(view->GetRenderers(), globalIdAsString.str().c_str(), VTK_PARSEALL);

  vtkInternals::WebGLObjId2IndexMap webglMap;
  for (int i = 0; i < webglExporter->GetNumberOfObjects(); ++i)
  {
    vtkWebGLObject* wObj = webglExporter->GetWebGLObject(i);
    if (wObj && wObj->isVisible())
    {
      vtkInternals::WebGLObjCacheValue val;
      val.ObjIndex = i;
      for (int j = 0; j < wObj->GetNumberOfParts(); ++j)
      {
        val.BinaryParts[j] = "";
      }
      webglMap[wObj->GetId()] = val;
    }
  }
  this->Internals->WebGLExporterObjIdMap[webglExporter] = webglMap;
  webglExporter->SetCenterOfRotation(static_cast<float>(centerOfRotation[0]),
    static_cast<float>(centerOfRotation[1]), static_cast<float>(centerOfRotation[2]));
  return webglExporter->GenerateMetadata();
}

//------------------------------------------------------------------------------
const char* vtkWebApplication::GetWebGLBinaryData(vtkRenderWindow* view, const char* id, int part)