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cybextrusionc.h

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/*
Copyright (C) 1999  Carsten Winkelholz

Malte Weiß, 16.07.2002: Node partially implemented.
            17.07.2002: Added GetSpineVector() which is designed to be used
                          by render sub-classes (e.g. CybGLExtrusionC)
            18.07.2002: Moved geometry creation from CybGLExtrusionC
                        Added event handling
            19.07.2002: Concave polygons supported.
                        Field 'solid' supported.
            22.07.2002: Line intersection tests added.

Address:  FGAN Forschungsgesellschaft f�r Angewandte Naturwissenschaften e. V.
      Neuenahrer Str. 20
      D - 53343 Wachtberg
      
Email:    winkelholz@fgan.de

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

#ifndef CYBEXTRUSION_HC
#define CYBEXTRUSION_HC

#include "oaw/ctk/cybnodec.h"
#include "oaw/ctk/cybgeometryc.h"
#include "oaw/ctk/cybwrlfields.h"
#include "../oawconfig.h"

OAW_BEGIN_NAMESPACE


// Structure for spine plane

typedef struct _SpinePlane
{
  Vector3C xAxis, yAxis, zAxis;
} SpinePlane;

// Structure for an extrusion vertex

typedef struct _ExtrusionVertex
{
  Vector3C n;       // Normal
  Vector3C p;       // Position
  double u, v;      // Texture Coordinates

  Vector3C nFace;   // Normal of the face which contains the vertex
} ExtrusionVertex;

class CybIsectLineChannelC;

// Class definition

class OAW_DLLMAPPING CybExtrusionC : public CybGeometryC
{
public:
  CybExtrusionC(CybWorldC*);
  CybExtrusionC(const CybExtrusionC&);
  CybExtrusionC& operator = (const CybExtrusionC&);
  ~CybExtrusionC();
  
  virtual void SetEvent(long, const void*, BaseI*);
  virtual long GetFieldEventID(const char*);
  virtual long GetFieldDataType(long);

  virtual void ToChannelDefault(CybChannelC* pV, long lFlag);
  virtual void ToChannelTexture(CybChannelC* pV, long lFlag);
  virtual void ToIsectLineChannel(CybIsectLineChannelC* pIsectChan);

protected:
  virtual void CreateNewCopy(CybNodeC*);
  virtual void LoadVRML(char*& iter, const char* iterEnd,long& znr);
  virtual void FinishInit();
  virtual void EventCascadeEnd();

  void         CalculateSpinePlanes();
  Vector3C     GetSpineVector(int nSpine, int nIndex);
  void         SetupPolyNormals(ExtrusionVertex *pVertices1, int nNumVertices1, ExtrusionVertex *pVertices2, int nNumVertices2);
  void         PrepareRender();
  void         TriToIsectLineChannel(CybIsectLineChannelC* pIsectChan, VectorC &vStartLine, VectorC &vEndLine, ExtrusionVertex &v0, ExtrusionVertex &v1, ExtrusionVertex &v2);

protected:
  short m_bLoading;   // Currently loading?
  
  // List of axis-defined spine planes
  ArrayC<SpinePlane> m_SpinePlanes;
  // Spine closed (ring)?  
  SFBool m_bClosed;

  // Render data
  ExtrusionVertex *m_pQuadVertices;      // Quad vertices
  long             m_lNumQuads;          // Number of quads

  ExtrusionVertex *m_pBeginCapVertices;  // Cap vertices
  ExtrusionVertex *m_pEndCapVertices;    // Cap vertices
  long             m_lNumCapVertices;    // Number of quads

public:
  // Extrusion properties
  SFBool      m_bBeginCap;
  SFBool      m_bCcw;
  SFBool      m_bConvex;
  SFFloat     m_fCreaseAngle;
  MFVec2f     m_mvCrossSection;

  SFBool      m_bEndCap;
  MFRotation  m_mrOrientation;
  MFVec2f     m_mvScale;
  SFBool      m_bSolid;
  MFVec3f     m_mvSpine;

  // Convex geometry data available?
  short        m_bConvexData;

  // Render data must be updated?
  short        m_bUpdateRender;

  // Key list
  static char VRMLKeyStrList[][30];
};

OAW_END_NAMESPACE


#endif

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