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https://git.code.sf.net/p/quake/quakeforge
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91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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See file, 'COPYING', for details.
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*/
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#ifndef qfbsp_csg4_h
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#define qfbsp_csg4_h
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#include "QF/bspfile.h"
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#include "QF/darray.h"
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/** \defgroup qfbsp_csg4 CSG Functions
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\ingroup qfbsp
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*/
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///@{
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struct plane_s;
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struct visfacet_s;
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struct brushset_s;
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struct surface_s;
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typedef struct DARRAY_TYPE (struct visfacet_s *) visfacetset_t;
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extern visfacetset_t validfaces;
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/** Build the surface lists for the brushset.
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Each plane still with faces after clipping will have one surface, and
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each surface will list the faces on that plane.
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\return Chain of all the external surfaces with one or more
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visible faces.
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*/
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struct surface_s *BuildSurfaces (void);
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/** Create a duplicate face.
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Duplicates the non point information of a face.
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\param in The face to duplicate.
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\return The new face.
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*/
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struct visfacet_s *NewFaceFromFace (const struct visfacet_s *in);
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/** Convert a brush-set to a list of clipped faces.
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The brushes of the brush set will be clipped against each other.
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\param bs The brush-set to convert.
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\return list of surfaces containing all of the faces
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*/
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struct surface_s *CSGFaces (struct brushset_s *bs);
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/** Split a face by a plane.
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\param in The face to split.
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\param split The plane by which to split the face.
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\param front Set to the new face repesenting the part of the input
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face that is in front of the plane, or NULL if there is
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no front portion.
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\param back Set to the new face repesenting the part of the input
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face that is behind the plane, or NULL if there is
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no back portion.
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\note A face entirely on the plane is considered to be behind the plane.
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\note The face represented by \a in becomes invalid. If either \a front
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or \a back is NULL, then no split has occurred and the other will be set
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to \a in.
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*/
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void SplitFace (struct visfacet_s *in, struct plane_s *split,
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struct visfacet_s **front, struct visfacet_s **back);
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///@}
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#endif//qfbsp_csg4_h
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