mirror of
https://git.code.sf.net/p/quake/quakeforge
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a4d95f3f53
Since the hull depth needs to be set for the hull to be useful, it makes sense to move the code into the same place that allocates new hulls (to me, anyway).
94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
/*
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clip_hull.c
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dynamic bsp clipping hull management
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Copyright (C) 2001 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2001/7/28
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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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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.
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See the 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:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
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#include "QF/clip_hull.h"
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#include "QF/model.h"
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VISIBLE clip_hull_t *
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MOD_Alloc_Hull (int nodes, int planes)
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{
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clip_hull_t *ch;
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int size, i;
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size = sizeof (hull_t);
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size += sizeof (mclipnode_t) * nodes + sizeof (plane_t) * planes;
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size *= MAX_MAP_HULLS;
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size += sizeof (clip_hull_t);
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ch = calloc (size, 1);
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if (!ch)
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return 0;
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ch->hulls[0] = (hull_t *) &ch[1];
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for (i = 1; i < MAX_MAP_HULLS; i++)
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ch->hulls[i] = &ch->hulls[i - 1][1];
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ch->hulls[0]->clipnodes = (mclipnode_t *) &ch->hulls[i - 1][1];
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ch->hulls[0]->planes = (plane_t *) &ch->hulls[0]->clipnodes[nodes];
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for (i = 1; i < MAX_MAP_HULLS; i++) {
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ch->hulls[i]->clipnodes =
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(mclipnode_t *) &ch->hulls[i - 1]->planes[planes];
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ch->hulls[i]->planes = (plane_t *) &ch->hulls[i]->clipnodes[nodes];
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}
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return ch;
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}
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VISIBLE void
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MOD_Free_Hull (clip_hull_t *ch)
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{
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free (ch);
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}
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static void
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recurse_clip_tree (hull_t *hull, int num, int depth)
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{
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mclipnode_t *node;
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if (num < 0) {
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if (depth > hull->depth)
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hull->depth = depth;
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return;
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}
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node = hull->clipnodes + num;
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recurse_clip_tree (hull, node->children[0], depth + 1);
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recurse_clip_tree (hull, node->children[1], depth + 1);
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}
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void
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Mod_FindClipDepth (hull_t *hull)
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{
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hull->depth = 0;
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if (hull->clipnodes) // no hull 3?
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recurse_clip_tree (hull, hull->firstclipnode, 1);
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}
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