// Created on: 1992-05-22
// Created by: Jean Claude VAUTHIER
// Copyright (c) 1992-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#ifndef _DrawTrSurf_BSplineSurface_HeaderFile
#define _DrawTrSurf_BSplineSurface_HeaderFile

#include <Draw_MarkerShape.hxx>
#include <Draw_Color.hxx>
#include <DrawTrSurf_Surface.hxx>

class Geom_BSplineSurface;

DEFINE_STANDARD_HANDLE(DrawTrSurf_BSplineSurface, DrawTrSurf_Surface)

//! This class defines a drawable BSplineSurface.
//! With this class you can draw the control points and the knots
//! of the surface.
//! You can use the general class Surface from DrawTrSurf too,
//! if you just want to sea boundaries and isoparametric curves.
class DrawTrSurf_BSplineSurface : public DrawTrSurf_Surface
{
  DEFINE_STANDARD_RTTIEXT(DrawTrSurf_BSplineSurface, DrawTrSurf_Surface)
  Draw_Drawable3D_FACTORY
public:
  
  //! default drawing mode.
  //! The isoparametric curves corresponding to the knots values are drawn.
  //! The control points and the knots points are drawn.
  //! The boundaries are yellow, the isoparametric curves are blues.
  //! For the discretisation 50 points are computed in each parametric direction.
  Standard_EXPORT DrawTrSurf_BSplineSurface (const Handle(Geom_BSplineSurface)& S);

  //! The isoparametric curves corresponding to the knots values are drawn.
  Standard_EXPORT DrawTrSurf_BSplineSurface (const Handle(Geom_BSplineSurface)& S,
                                             const Draw_Color& BoundsColor, const Draw_Color& IsosColor, const Draw_Color& PolesColor,
                                             const Draw_Color& KnotsColor, const Draw_MarkerShape KnotsShape, const Standard_Integer KnotsSize,
                                             const Standard_Boolean ShowPoles, const Standard_Boolean ShowKnots,
                                             const Standard_Integer Discret, const Standard_Real Deflection, const Standard_Integer DrawMode);

  //! Parametric equidistant iso curves are drawn.
  Standard_EXPORT DrawTrSurf_BSplineSurface (const Handle(Geom_BSplineSurface)& S,
                                             const Standard_Integer NbUIsos, const Standard_Integer NbVIsos,
                                             const Draw_Color& BoundsColor, const Draw_Color& IsosColor, const Draw_Color& PolesColor,
                                             const Draw_Color& KnotsColor, const Draw_MarkerShape KnotsShape, const Standard_Integer KnotsSize,
                                             const Standard_Boolean ShowPoles, const Standard_Boolean ShowKnots,
                                             const Standard_Integer Discret, const Standard_Real Deflection, const Standard_Integer DrawMode);

  Standard_EXPORT virtual void DrawOn (Draw_Display& dis) const Standard_OVERRIDE;

  void ShowPoles() { drawPoles = Standard_True; }

  void ShowKnots() { drawKnots = Standard_True; }

  //! change the number of isoparametric curves to be drawn.
  Standard_EXPORT virtual void ShowIsos (const Standard_Integer Nu, const Standard_Integer Nv) Standard_OVERRIDE;

  //! change the number of isoparametric curves to be drawn.
  Standard_EXPORT void ShowKnotsIsos();

  //! rub out all the isoparametric curves.
  Standard_EXPORT virtual void ClearIsos() Standard_OVERRIDE;

  void ClearPoles() { drawPoles = Standard_False; }

  void ClearKnots() { drawKnots = Standard_False; }
  
  Standard_EXPORT void FindPole (const Standard_Real X, const Standard_Real Y, const Draw_Display& D, const Standard_Real Prec, Standard_Integer& UIndex, Standard_Integer& VIndex) const;
  
  Standard_EXPORT void FindUKnot (const Standard_Real X, const Standard_Real Y, const Draw_Display& D, const Standard_Real Prec, Standard_Integer& UIndex) const;
  
  Standard_EXPORT void FindVKnot (const Standard_Real X, const Standard_Real Y, const Draw_Display& D, const Standard_Real Prec, Standard_Integer& VIndex) const;

  void SetPolesColor (const Draw_Color& theColor) { polesLook = theColor; }

  void SetKnotsColor (const Draw_Color& theColor) { knotsLook = theColor; }

  void SetKnotsShape (const Draw_MarkerShape theShape) { knotsForm = theShape; }

  Draw_MarkerShape KnotsShape() const { return knotsForm; }

  Draw_Color KnotsColor() const { return knotsLook; }

  Draw_Color PolesColor() const { return polesLook; }

  //! For variable copy.
  Standard_EXPORT virtual Handle(Draw_Drawable3D) Copy() const Standard_OVERRIDE;

private:

  Standard_Boolean drawPoles;
  Standard_Boolean drawKnots;
  Standard_Boolean knotsIsos;
  Draw_MarkerShape knotsForm;
  Draw_Color knotsLook;
  Standard_Integer knotsDim;
  Draw_Color polesLook;

};

#endif // _DrawTrSurf_BSplineSurface_HeaderFile