mirror of
https://git.code.sf.net/p/quake/quakeforge
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91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
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/*
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leafmesh.c
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Generate a mesh for a leaf node.
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Copyright (C) 2023 Bill Currie <bill@taniwha.org>
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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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// models are the only shared resource between a client and server running
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// on the same machine.
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include "QF/sys.h"
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#include "QF/va.h"
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#include "QF/zone.h"
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#include "qfalloca.h"
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#include "compat.h"
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#include "mod_internal.h"
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#include "r_internal.h"
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#include "vid_vulkan.h"
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typedef struct {
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vec3_t vel; // velocity part of Plücker coords
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vec3_t mom; // moment part of Plücker coords
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uint32_t verts[2]; // ~0u if not a valid vert (0 or 1 plane intersects)
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} lm_edge_t;
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typedef struct {
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vec4f_t p; // 1-vector plane (ax + by + cz + d = 0)
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} lm_plane_t;
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typedef struct {
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vec4f_t p; // trivector point
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} lm_vert_t;
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void *leafmesh (const mod_brush_t *brush, uint32_t leafnum, memhunk_t *hunk);
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void *
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leafmesh (const mod_brush_t *brush, uint32_t leafnum, memhunk_t *hunk)
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{
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if (leafnum > brush->modleafs || leafnum < 1) {
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// invalid leafnum (0 is the infinite solid leaf and doesn't actually
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// exist (also, generally not convex))
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return 0;
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}
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if (!brush->leaf_parents[leafnum]) {
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// with only one parent node, there's no way to generate a mesh for
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// the leaf
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return 0;
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}
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uint32_t num_planes = 0;
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for (int32_t p = brush->leaf_parents[leafnum]; p != -1;
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p = brush->leaf_parents[p]) {
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num_planes++;
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};
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lm_plane_t *planes = Hunk_RawAlloc (hunk, sizeof (lm_plane_t[num_planes]));
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for (int32_t p = brush->leaf_parents[leafnum], i = 0; p != -1;
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p = brush->leaf_parents[p], i++) {
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planes[i].p = brush->nodes[p].plane;
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};
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}
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