mirror of
https://git.do.srb2.org/STJr/UltimateZoneBuilder.git
synced 2024-11-23 20:32:34 +00:00
369 lines
7.4 KiB
C++
369 lines
7.4 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) 2012-2014 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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#include "vpo_local.h"
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#include "vpo_api.h"
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static char error_buffer[1024];
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// cache for the sector lookup
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static int last_x, last_y;
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static vpo::sector_t *last_sector;
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static void ClearError(void)
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{
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strcpy(error_buffer, "(No Error)");
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}
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static void SetError(const char *msg, ...)
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{
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va_list argptr;
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va_start(argptr, msg);
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memset(error_buffer, 0, sizeof(error_buffer));
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vsnprintf(error_buffer, sizeof(error_buffer) - 1, msg, argptr);
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va_end(argptr);
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}
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const char *VPO_GetError(void)
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{
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return error_buffer;
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}
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//------------------------------------------------------------------------
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int VPO_LoadWAD(const char *wad_filename)
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{
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ClearError();
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// free any previously loaded wad
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VPO_FreeWAD();
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vpo::R_Init();
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if (! vpo::W_AddFile(wad_filename))
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{
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SetError("Missing or invalid wad file: %s", wad_filename);
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return -1;
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}
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return 0; // OK !
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}
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int VPO_OpenMap(const char *map_name, bool *is_hexen)
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{
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// check a wad is loaded
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if (vpo::numlumps <= 0)
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{
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SetError("VPO_OpenMap called without any loaded wad");
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return -1;
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}
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ClearError();
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// close any previously loaded map
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VPO_CloseMap();
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const char *err_msg = vpo::P_SetupLevel(map_name, is_hexen);
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if (err_msg)
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{
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SetError("%s", err_msg);
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return -1;
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}
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return 0; // OK !
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}
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void VPO_FreeWAD(void)
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{
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VPO_CloseMap();
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vpo::W_RemoveFile();
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}
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void VPO_CloseMap(void)
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{
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ClearError();
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last_x = -77777;
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last_y = -77777;
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last_sector = NULL;
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vpo::P_FreeLevelData();
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}
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const char * VPO_GetMapName(unsigned int index, bool *is_hexen)
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{
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static char buffer[16];
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for (int lump_i = 0 ; lump_i < vpo::numlumps ; lump_i++)
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{
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if (! vpo::lumpinfo[lump_i].is_map_header)
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continue;
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if (index == 0)
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{
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// found it
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memcpy(buffer, vpo::lumpinfo[lump_i].name, 8);
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buffer[8] = 0;
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if (is_hexen)
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*is_hexen = vpo::lumpinfo[lump_i].is_hexen;
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return buffer;
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}
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index--;
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}
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// not found
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return NULL;
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}
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int VPO_GetLinedef(unsigned int index, int *x1, int *y1, int *x2, int *y2)
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{
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if (index >= (unsigned int)vpo::numlines)
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return -1;
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const vpo::line_t *L = &vpo::lines[index];
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*x1 = L->v1->x >> FRACBITS;
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*y1 = L->v1->y >> FRACBITS;
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*x2 = L->v2->x >> FRACBITS;
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*y2 = L->v2->y >> FRACBITS;
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return L->backsector ? 2 : 1;
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}
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int VPO_GetSeg(unsigned int index, int *linedef, int *side,
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int *x1, int *y1, int *x2, int *y2)
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{
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if (index >= (unsigned int)vpo::numsegs)
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return -1;
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const vpo::seg_t *seg = &vpo::segs[index];
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const vpo::line_t *L = seg->linedef;
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*x1 = seg->v1->x >> FRACBITS;
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*y1 = seg->v1->y >> FRACBITS;
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*x2 = seg->v2->x >> FRACBITS;
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*y2 = seg->v2->y >> FRACBITS;
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*linedef = (L - vpo::lines);
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*side = 0;
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if (L->sidenum[1] >= 0 && seg->sidedef == &vpo::sides[L->sidenum[1]])
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*side = 1;
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return 0;
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}
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void VPO_GetBBox(int *x1, int *y1, int *x2, int *y2)
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{
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*x1 = (vpo::Map_bbox[vpo::BOXLEFT] >> FRACBITS);
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*y1 = (vpo::Map_bbox[vpo::BOXBOTTOM] >> FRACBITS);
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*x2 = (vpo::Map_bbox[vpo::BOXRIGHT] >> FRACBITS);
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*y2 = (vpo::Map_bbox[vpo::BOXTOP] >> FRACBITS);
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}
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void VPO_OpenDoorSectors(int dir)
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{
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for (int i = 0 ; i < vpo::numsectors ; i++)
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{
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vpo::sector_t *sec = &vpo::sectors[i];
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if (sec->is_door == 0)
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continue;
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if (dir > 0) // open them
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{
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if (sec->is_door > 0)
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sec->ceilingheight = sec->alt_height;
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else
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sec->floorheight = sec->alt_height;
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}
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else if (dir < 0) // close them
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{
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if (sec->is_door > 0)
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sec->ceilingheight = sec->floorheight;
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else
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sec->floorheight = sec->ceilingheight;
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}
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}
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}
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//------------------------------------------------------------------------
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int VPO_TestSpot(int x, int y, int dz, int angle,
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int *num_visplanes, int *num_drawsegs,
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int *num_openings, int *num_solidsegs)
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{
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// the actual spot we will use
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// (this prevents issues with X_SectorForPoint getting the wrong
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// value when the casted ray hits a vertex)
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vpo::fixed_t rx = (x << FRACBITS) + (FRACUNIT / 2);
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vpo::fixed_t ry = (y << FRACBITS) + (FRACUNIT / 2);
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// check if spot is outside the map
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if (rx < vpo::Map_bbox[vpo::BOXLEFT] ||
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rx > vpo::Map_bbox[vpo::BOXRIGHT] ||
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ry < vpo::Map_bbox[vpo::BOXBOTTOM] ||
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ry > vpo::Map_bbox[vpo::BOXTOP])
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{
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return RESULT_IN_VOID;
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}
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// optimization: we cache the last sector lookup
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vpo::sector_t *sec;
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if (x == last_x && y == last_y)
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sec = last_sector;
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else
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{
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sec = vpo::X_SectorForPoint(rx, ry);
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last_x = x;
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last_y = y;
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last_sector = sec;
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}
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if (! sec)
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return RESULT_IN_VOID;
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vpo::fixed_t rz;
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if (dz < 0)
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rz = sec->ceilingheight + (dz << FRACBITS);
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else
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rz = sec->floorheight + (dz << FRACBITS);
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if (rz <= sec->floorheight || rz >= sec->ceilingheight)
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return RESULT_BAD_Z;
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// convert angle to the 32-bit BAM representation
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if (angle == 360)
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angle = 0;
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vpo::fixed_t ang2 = vpo::FixedDiv(angle << FRACBITS, 360 << FRACBITS);
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vpo::angle_t r_ang = (vpo::angle_t) (ang2 << 16);
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int result = RESULT_OK;
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// perform a no-draw render and see how many visplanes were needed
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try
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{
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vpo::R_RenderView(rx, ry, rz, r_ang);
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}
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catch (vpo::overflow_exception& e)
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{
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result = RESULT_OVERFLOW;
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}
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*num_visplanes = MAX(*num_visplanes, vpo::total_visplanes);
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*num_drawsegs = MAX(*num_drawsegs, vpo::total_drawsegs);
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*num_openings = MAX(*num_openings, vpo::total_openings);
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*num_solidsegs = MAX(*num_solidsegs, vpo::max_solidsegs);
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return result;
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}
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//------------------------------------------------------------------------
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#if 0 // VPO_TEST_PROGRAM
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// NOTE: this is out of date and will not compile
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#define EYE_HEIGHT 41
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int main(int argc, char **argv)
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{
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printf("----------------\n");
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printf("VPO TEST PROGRAM\n");
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printf("----------------\n");
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printf("\n");
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if (argc < 5 ||
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(strcmp (argv[1], "-h") == 0 ||
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strcmp (argv[1], "--help") == 0 ||
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strcmp (argv[1], "/?") == 0) )
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{
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printf("Usage: vpotest file.wad MAP01 x y angle\n");
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fflush(stdout);
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return 0;
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}
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const char *filename = argv[1];
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const char *map = argv[2];
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int x = atoi(argv[3]);
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int y = atoi(argv[4]);
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int angle = atoi(argv[5]);
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printf("Loading file: %s [%s]\n", filename, map);
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if (VPO_LoadWAD(filename) != 0)
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{
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printf("ERROR: %s\n", VPO_GetError());
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fflush(stdout);
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return 1;
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}
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if (VPO_OpenMap(map) != 0)
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{
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printf("ERROR: %s\n", VPO_GetError());
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fflush(stdout);
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VPO_FreeWAD();
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return 1;
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}
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int vp_num = VPO_TestSpot(TEST_VISPLANES, x, y, EYE_HEIGHT, angle);
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printf("\n");
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printf("Visplanes @ (%d %d) ---> %d\n", x, y, vp_num);
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fflush(stdout);
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VPO_CloseMap();
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VPO_FreeWAD();
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return 0;
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}
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#endif // VPO_TEST_PROGRAM
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//--- editor settings ---
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// vi:ts=4:sw=4:noexpandtab
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