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# igeom/clip2d.h

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    00001 /*
    00002     Copyright (C) 2000 by Jorrit Tyberghein
    00003
    00004     This library is free software; you can redistribute it and/or
    00005     modify it under the terms of the GNU Library General Public
    00006     License as published by the Free Software Foundation; either
    00007     version 2 of the License, or (at your option) any later version.
    00008
    00009     This library is distributed in the hope that it will be useful,
    00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00012     Library General Public License for more details.
    00013
    00014     You should have received a copy of the GNU Library General Public
    00015     License along with this library; if not, write to the Free
    00016     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    00017 */
    00018
    00019 #ifndef __CS_IGEOM_CLIP2D_H__
    00020 #define __CS_IGEOM_CLIP2D_H__
    00021
    00030 #include "csutil/scf_interface.h"
    00031
    00032 class csBox2;
    00033 class csVector2;
    00034
    00036 #define MAX_OUTPUT_VERTICES     64
    00037
    00046 enum
    00047 {
    00049   CS_CLIP_OUTSIDE = 0,
    00051   CS_CLIP_CLIPPED = 1,
    00053   CS_CLIP_INSIDE = 2
    00054 };
    00065 struct csVertexStatus
    00066 {
    00071   unsigned char Type;
    00073   size_t Vertex;
    00075   float Pos;
    00076 };
    00077
    00079 enum
    00080 {
    00082   CS_VERTEX_ORIGINAL = 0,
    00084   CS_VERTEX_ONEDGE = 1,
    00086   CS_VERTEX_INSIDE = 2
    00087 };
    00094 struct iClipper2D : public virtual iBase
    00095 {
    00096   SCF_INTERFACE(iClipper2D, 2, 0, 0);
    00102   virtual uint8 Clip (csVector2 *InPolygon, size_t InCount,
    00103     csVector2 *OutPolygon, size_t &OutCount) = 0;
    00104
    00113   virtual uint8 Clip (csVector2 *InPolygon, size_t InCount,
    00114     csVector2 *OutPolygon, size_t &OutCount, csBox2 &BoundingBox) = 0;
    00115
    00125   virtual uint8 Clip (csVector2 *InPolygon, size_t InCount,
    00126     csVector2 *OutPolygon, size_t &OutCount, csVertexStatus *OutStatus) = 0;
    00127
    00132   virtual uint8 ClipInPlace (csVector2 *InPolygon, size_t &InOutCount,
    00133                              csBox2 &BoundingBox) = 0;
    00134
    00142   virtual int ClassifyBox (const csBox2 &box) = 0;
    00143
    00145   virtual bool IsInside (const csVector2& v) = 0;
    00146
    00148   virtual size_t GetVertexCount () = 0;
    00149
    00151   virtual csVector2 *GetClipPoly () = 0;
    00152
    00154   enum ClipperType
    00155   {
    00157     clipperPoly,
    00159     clipperBox
    00160   };
    00164   virtual ClipperType GetClipperType() const = 0;
    00165 };
    00166
    00169 #endif // __CS_IGEOM_CLIP2D_H__