/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkHiddenLineRemovalPass.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/

/**
 * @class   vtkHiddenLineRemovalPass
 * @brief   RenderPass for HLR.
 *
 *
 * This render pass renders wireframe polydata such that only the front
 * wireframe surface is drawn.
 */

#ifndef vtkHiddenLineRemovalPass_h
#define vtkHiddenLineRemovalPass_h

#include "vtkOpenGLRenderPass.h"
#include "vtkRenderingOpenGL2Module.h" // For export macro

#include <vector> // For std::vector!

class vtkProp;
class vtkViewport;

class VTKRENDERINGOPENGL2_EXPORT vtkHiddenLineRemovalPass : public vtkOpenGLRenderPass
{
public:
  static vtkHiddenLineRemovalPass* New();
  vtkTypeMacro(vtkHiddenLineRemovalPass, vtkOpenGLRenderPass);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void Render(const vtkRenderState* s) override;

  /**
   * Returns true if any of the nProps in propArray are rendered as wireframe.
   */
  static bool WireframePropsExist(vtkProp** propArray, int nProps);

protected:
  vtkHiddenLineRemovalPass();
  ~vtkHiddenLineRemovalPass() override;

  void SetRepresentation(std::vector<vtkProp*>& props, int repr);
  int RenderProps(std::vector<vtkProp*>& props, vtkViewport* vp);

private:
  vtkHiddenLineRemovalPass(const vtkHiddenLineRemovalPass&) = delete;
  void operator=(const vtkHiddenLineRemovalPass&) = delete;
};

#endif // vtkHiddenLineRemovalPass_h