[vtkusers] [Collision detection ] How to prevent overlapping actors ?

[agatte]

Hi, 

I want to prevent overlapping/collision  of two actors in the render scene.
I have already tried vtkIntersectionFilter, bu tit doesn't work in my case.

Could You advice me something different ?

int main(int, char *[])
{
  // Lower - first model
  vtkSmartPointer<vtkSTLReader> readerLower =
vtkSmartPointer<vtkSTLReader>::New();
  readerLower->SetFileName("lower.stl");
  readerLower->Update();

  // Upper - second model
  vtkSmartPointer<vtkSTLReader> readerUpper =
vtkSmartPointer<vtkSTLReader>::New();
  readerUpper->SetFileName("upper.stl");
  readerUpper->Update();

  // Create polydata
  vtkSmartPointer<vtkPolyData> lowerPolyData = readerLower->GetOutput();
  vtkSmartPointer<vtkPolyData> pointsUpperPolyData =
readerUpper->GetOutput();
  pointsUpperPolyData->GetPoints();


  // Set  input transform to avoid overlap actors (models)
  vtkSmartPointer<vtkTransform> transform =
vtkSmartPointer<vtkTransform>::New();
  transform->PostMultiply();
  transform->RotateZ(180.0);
  transform->RotateX(180.0);
  transform->Translate(0,0,35);
 
  // Set polydata filter 
  vtkSmartPointer<vtkTransformPolyDataFilter> transformFilter =
vtkSmartPointer<vtkTransformPolyDataFilter>::New();
  transformFilter->SetInput(pointsUpperPolyData); // upperPolyData
  transformFilter->SetTransform(transform);
  transformFilter->Update();
 
  vtkSmartPointer<vtkPolyDataMapper> lowerMapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
  lowerMapper->SetInput(lowerPolyData);
  vtkSmartPointer<vtkPolyDataMapper> upperMapper = 
vtkSmartPointer<vtkPolyDataMapper>::New();
  upperMapper->SetInput(pointsUpperPolyData);

  vtkSmartPointer<vtkActor> upperActor =  vtkSmartPointer<vtkActor>::New();
  upperActor->SetMapper(upperMapper);
  vtkSmartPointer<vtkActor> lowerActor =  vtkSmartPointer<vtkActor>::New();
  lowerActor->SetMapper(lowerMapper);
  lowerActor->SetUserTransform(transform);


  vtkSmartPointer<vtkIntersectionPolyDataFilter> intersectionPolyDataFilter
=
    vtkSmartPointer<vtkIntersectionPolyDataFilter>::New();
  intersectionPolyDataFilter->SetInput( 0, lowerPolyData );
  intersectionPolyDataFilter->SetInput( 1, pointsUpperPolyData );
  intersectionPolyDataFilter->Update();
 
  vtkSmartPointer<vtkPolyDataMapper> intersectionMapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
  intersectionMapper->SetInputConnection(
intersectionPolyDataFilter->GetOutputPort() );
  intersectionMapper->ScalarVisibilityOff();
 
  vtkSmartPointer<vtkActor> intersectionActor =
vtkSmartPointer<vtkActor>::New();
  intersectionActor->SetMapper( intersectionMapper );
 
  //vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
  //renderer->AddViewProp(sphere1Actor);
  //renderer->AddViewProp(sphere2Actor);
  //renderer->AddViewProp(intersectionActor);


  // Visualization

  // Create a renderer, render window, and interactor
  vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
  renderer->AddActor(lowerActor);
  renderer->AddActor(upperActor);
  //renderer->AddActor(booleanOperationActor);
  renderer->AddActor(intersectionActor);
  
  // Render Window
  vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);

  // Interactor
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);

  // Move actors
  vtkSmartPointer<vtkInteractorStyleTrackballActor> styleActor = 
vtkSmartPointer<vtkInteractorStyleTrackballActor>::New(); 
  renderWindowInteractor->SetInteractorStyle( styleActor );
  renderWindowInteractor->SetRenderWindow(renderWindow);

  // Render and interact
  renderer->SetBackground(.2, .3, .4);
  renderWindow->Render();
  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
}


I would appreciate for any help please.





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