G4VtkText2DPipeline.cc

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// Created by Stewart Boogert on 05/03/2023.
//
 
#include "G4VtkText2DPipeline.hh"
 
#include "G4Text.hh"
#include "G4VisAttributes.hh"
#include "G4VtkViewer.hh"
 
#include <vtkTextActor.h>
#include <vtkTextProperty.h>
 
std::size_t G4VtkText2DPipeline::MakeHash(const G4Text& text, const G4VtkVisContext& /*vc*/,
                                          const G4VisAttributes* pVA)
{
  std::size_t hash = std::hash<G4VisAttributes>{}(*pVA);
 
  G4double x = text.GetPosition().x();
  G4double y = text.GetPosition().y();
 
  std::hash_combine(hash, std::hash<G4String>{}(text.GetText()));
  std::hash_combine(hash, std::hash<G4double>{}(x));
  std::hash_combine(hash, std::hash<G4double>{}(y));
 
  return hash;
}
 
G4VtkText2DPipeline::G4VtkText2DPipeline(const G4Text& text, const G4VtkVisContext& vcIn,
                                         const G4VisAttributes* pVA)
  : G4VVtkPipeline(text.GetText().c_str(), "G4VtkText2DPipeline", vcIn, false, vcIn.fViewer->renderer)
{
  G4double x = text.GetPosition().x();
  G4double y = text.GetPosition().y();
 
  G4Color colour = pVA->GetColour();
  G4double opacity = colour.GetAlpha();
 
  actor = vtkSmartPointer<vtkTextActor>::New();
  actor->SetInput(text.GetText().c_str());
  actor->GetPositionCoordinate()->SetCoordinateSystemToNormalizedViewport();
  // actor->SetTextScaleModeToViewport();
  actor->SetPosition((x + 1.) / 2.0, (y + 1.) / 2.);
  actor->GetTextProperty()->SetFontSize(text.GetScreenSize());
  actor->GetTextProperty()->SetColor(colour.GetRed(), colour.GetGreen(), colour.GetBlue());
  actor->GetTextProperty()->SetOpacity(opacity);
 
  switch (text.GetLayout()) {
    case G4Text::Layout::left:
      actor->GetTextProperty()->SetJustificationToLeft();
      break;
    case G4Text::Layout::centre:
      actor->GetTextProperty()->SetJustificationToCentered();
      break;
    case G4Text::Layout::right:
      actor->GetTextProperty()->SetJustificationToRight();
      break;
  }
 
  vc.fViewer->renderer->AddActor(actor);
}
 
void G4VtkText2DPipeline::Enable()
{
  actor->SetVisibility(1);
}
 
void G4VtkText2DPipeline::Disable()
{
  actor->SetVisibility(0);
}
 
void G4VtkText2DPipeline::Print()
{
  G4VVtkPipeline::Print();
}
 
void G4VtkText2DPipeline::Modified()
{
  G4VVtkPipeline::Modified();
}
 
void G4VtkText2DPipeline::Clear()
{
  renderer->RemoveViewProp(actor);
 
  G4VVtkPipeline::Clear();
}
 
void G4VtkText2DPipeline::SetText(const G4String& text)
{
  actor->SetInput(text.c_str());
}