Public API Reference

igeom/clip2d.h

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/*
    Copyright (C) 2000 by Jorrit Tyberghein

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

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifndef __CS_IGEOM_CLIP2D_H__
#define __CS_IGEOM_CLIP2D_H__

#include "csutil/scf_interface.h"

class csBox2;
class csVector2;

#define MAX_OUTPUT_VERTICES     64

enum
{
  CS_CLIP_OUTSIDE = 0,
  CS_CLIP_CLIPPED = 1,
  CS_CLIP_INSIDE = 2
};
struct csVertexStatus
{
  unsigned char Type;
  size_t Vertex;
  float Pos;
};

enum
{
  CS_VERTEX_ORIGINAL = 0,
  CS_VERTEX_ONEDGE = 1,
  CS_VERTEX_INSIDE = 2
};
struct iClipper2D : public virtual iBase
{
  SCF_INTERFACE(iClipper2D, 2, 0, 0);
  virtual uint8 Clip (csVector2 *InPolygon, size_t InCount,
    csVector2 *OutPolygon, size_t &OutCount) = 0;

  virtual uint8 Clip (csVector2 *InPolygon, size_t InCount,
    csVector2 *OutPolygon, size_t &OutCount, csBox2 &BoundingBox) = 0;

  virtual uint8 Clip (csVector2 *InPolygon, size_t InCount,
    csVector2 *OutPolygon, size_t &OutCount, csVertexStatus *OutStatus) = 0;

  virtual uint8 ClipInPlace (csVector2 *InPolygon, size_t &InOutCount,
                             csBox2 &BoundingBox) = 0;

  virtual int ClassifyBox (const csBox2 &box) = 0;

  virtual bool IsInside (const csVector2& v) = 0;

  virtual size_t GetVertexCount () = 0;

  virtual csVector2 *GetClipPoly () = 0;

  enum ClipperType
  {
    clipperPoly,
    clipperBox
  };
  virtual ClipperType GetClipperType() const = 0;
};

#endif // __CS_IGEOM_CLIP2D_H__

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