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84 lines
3.2 KiB
C
84 lines
3.2 KiB
C
//------------------------------------------------------------------------
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// Visplane Overflow Library
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//------------------------------------------------------------------------
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//
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// Copyright (C) 1993-1996 Id Software, Inc.
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// Copyright (C) 2005 Simon Howard
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// Copyright (C) 2012 Andrew Apted
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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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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//
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//------------------------------------------------------------------------
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#ifndef __VPO_API_H__
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#define __VPO_API_H__
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// return error message when something fails
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// (this will be a static buffer, so is not guaranteed to remain valid
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// after any other API call)
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const char* APIENTRY VPO_GetError(void);
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// try to load a wad file
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// returns 0 on success, negative value on error
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int APIENTRY VPO_LoadWAD(const char *wad_filename);
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// free all data associated with the wad file
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// can be safely called without any loaded wad file
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void APIENTRY VPO_FreeWAD(void);
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// retrieve the map names in the wad, one at a time
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// index starts at 0
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// returns NULL when index is past the end of the list
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// NOTE: return pointer may be a static buffer, not guaranteed to
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// remain valid once this function is called again
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const char* APIENTRY VPO_GetMapName(unsigned int index);
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// try to open a map from the current wad file
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// returns 0 on success, negative value on error
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int APIENTRY VPO_OpenMap(const char *map_name);
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// free all data associated with a map
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// can be safely called without any opened map
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void APIENTRY VPO_CloseMap(void);
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// retrieve the linedefs in the current map, one at a time
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// index starts at 0
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// returns number of sides (0 to 2), or -1 for invalid index
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int APIENTRY VPO_GetLinedef(unsigned int index, int *x1, int *y1, int *x2, int *y2);
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// test a spot and angle, returning the number of visplanes
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// dz is the height above the floor (or offset from ceiling if < 0)
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// angle is in degrees (0 to 360), 0 is east, 90 is north
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// returns RESULT_OK on success, or a negative value spot was in the
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// void or an error occurred -- see the RESULT_* values below
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//
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// the num_xxx parameters point to variables which get _updated_ by
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// this call (i.e. new value is maximum of old value + checked value).
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// hence you need to set those variables to zero before the first
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// call at a particular (X Y) location.
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//
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// RESULT_OVERFLOW means that an internal limit overflowed (which are
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// four times or more the actual DOOM limits).
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#define RESULT_OK 0
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#define RESULT_BAD_Z -1
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#define RESULT_IN_VOID -2
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#define RESULT_OVERFLOW -3
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int APIENTRY VPO_TestSpot(int x, int y, int dz, int angle,
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int *num_visplanes,
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int *num_drawsegs,
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int *num_openings,
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int *num_solidsegs);
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#endif /* __VPO_API_H__ */
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