1 /* Emacs style mode select   -*- C++ -*-
2  *-----------------------------------------------------------------------------
3  *
4  *
5  *  PrBoom: a Doom port merged with LxDoom and LSDLDoom
6  *  based on BOOM, a modified and improved DOOM engine
7  *  Copyright (C) 1999 by
8  *  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
9  *  Copyright (C) 1999-2000 by
10  *  Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
11  *  Copyright 2005, 2006 by
12  *  Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
13  *
14  *  This program is free software; you can redistribute it and/or
15  *  modify it under the terms of the GNU General Public License
16  *  as published by the Free Software Foundation; either version 2
17  *  of the License, or (at your option) any later version.
18  *
19  *  This program is distributed in the hope that it will be useful,
20  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
21  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22  *  GNU General Public License for more details.
23  *
24  *  You should have received a copy of the GNU General Public License
25  *  along with this program; if not, write to the Free Software
26  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
27  *  02111-1307, USA.
28  *
29  * DESCRIPTION:
30  *      Refresh, visplane stuff (floor, ceilings).
31  *
32  *-----------------------------------------------------------------------------*/
33 
34 #ifndef __R_PLANE__
35 #define __R_PLANE__
36 
37 #include "r_data.h"
38 
39 /* killough 10/98: special mask indicates sky flat comes from sidedef */
40 #define PL_SKYFLAT (0x80000000)
41 
42 /* Visplane related. */
43 extern int *lastopening; // dropoff overflow
44 
45 extern int floorclip[], ceilingclip[]; // dropoff overflow
46 extern fixed_t yslope[], distscale[];
47 
48 void R_InitPlanes(void);
49 void R_ClearPlanes(void);
50 void R_DrawPlanes (void);
51 
52 visplane_t *R_FindPlane(
53                         fixed_t height,
54                         int picnum,
55                         int lightlevel,
56                         fixed_t xoffs,  /* killough 2/28/98: add x-y offsets */
57                         fixed_t yoffs
58                        );
59 
60 visplane_t *R_CheckPlane(visplane_t *pl, int start, int stop);
61 visplane_t *R_DupPlane(const visplane_t *pl, int start, int stop);
62 
63 #endif
64