1226 lines
No EOL
24 KiB
C
1226 lines
No EOL
24 KiB
C
/*
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Copyright (C) 2002-2003 Charles Hollemeersch
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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 the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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PENTA:
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Quake 3 collision/areaportals code
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Heavily based on the public quake2 source
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*/
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#include "quakedef.h"
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mplane_t *box_planes;
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int box_firstbrush;
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mbrush_t *box_brush;
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//#define M sv.worldmodel
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//timestamp variables
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int c_pointcontents = 0;
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int c_brush_traces = 0;
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int checkcount = 0;
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int c_traces = 0;
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/*
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===================
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CM_InitBoxHull
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Set up the planes and nodes so that the six floats of a bounding box
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can just be stored out and get a proper clipping hull structure.
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===================
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*/
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void CM_InitBoxHull (model_t *M)
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{
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int i;
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int side;
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mplane_t *p;
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mbrushside_t *s;
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box_planes = &M->planes[M->numplanes];
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box_firstbrush = M->numbrushes;
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box_brush = &M->brushes[M->numbrushes];
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box_brush->numsides = 6;
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box_brush->firstbrushside = M->numbrushsides;
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box_brush->contents = CONTENTS_SOLID;
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for (i=0 ; i<6 ; i++)
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{
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side = i&1;
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// brush sides
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s = &M->brushsides[M->numbrushsides+i];
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s->plane = M->planes + (M->numplanes+i*2+side);
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s->shader = NULL;
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// planes
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p = &box_planes[i*2];
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p->type = i>>1;
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p->signbits = 0;
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VectorClear (p->normal);
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p->normal[i>>1] = 1;
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p = &box_planes[i*2+1];
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p->type = 3 + (i>>1);
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p->signbits = 0;
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VectorClear (p->normal);
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p->normal[i>>1] = -1;
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}
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}
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/*
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===================
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CM_HeadnodeForBox
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To keep everything totally uniform, bounding boxes are turned into small
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BSP trees instead of being compared directly.
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===================
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*//*
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int CM_HeadnodeForBox (vec3_t mins, vec3_t maxs)
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{
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box_planes[0].dist = maxs[0];
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box_planes[1].dist = -maxs[0];
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box_planes[2].dist = mins[0];
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box_planes[3].dist = -mins[0];
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box_planes[4].dist = maxs[1];
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box_planes[5].dist = -maxs[1];
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box_planes[6].dist = mins[1];
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box_planes[7].dist = -mins[1];
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box_planes[8].dist = maxs[2];
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box_planes[9].dist = -maxs[2];
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box_planes[10].dist = mins[2];
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box_planes[11].dist = -mins[2];
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return box_headnode;
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}
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*/
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/*
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===================
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CM_BrushForBox
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===================
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*/
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int CM_BrushForBox (vec3_t mins, vec3_t maxs)
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{
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box_planes[0].dist = maxs[0];
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box_planes[1].dist = -maxs[0];
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box_planes[2].dist = mins[0];
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box_planes[3].dist = -mins[0];
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box_planes[4].dist = maxs[1];
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box_planes[5].dist = -maxs[1];
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box_planes[6].dist = mins[1];
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box_planes[7].dist = -mins[1];
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box_planes[8].dist = maxs[2];
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box_planes[9].dist = -maxs[2];
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box_planes[10].dist = mins[2];
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box_planes[11].dist = -mins[2];
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return box_firstbrush;
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}
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/*
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==================
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CM_PointLeafnum_r
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==================
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*/
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int CM_PointLeafnum_r (model_t *M, vec3_t p, int num)
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{
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float d;
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mnode_t *node;
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mplane_t *plane;
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while (num >= 0)
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{
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node = M->nodes + num;
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plane = node->plane;
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if (plane->type < 3)
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d = p[plane->type] - plane->dist;
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else
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d = DotProduct (plane->normal, p) - plane->dist;
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if (d < 0)
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num = node->ichildren[1];
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else
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num = node->ichildren[0];
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}
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c_pointcontents++; // optimize counter
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return -1 - num;
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}
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int CM_PointLeafnum (model_t *M, vec3_t p)
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{
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if (!M->numplanes)
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return 0; // sound may call this without map loaded
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return CM_PointLeafnum_r (M, p, 0);
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}
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/*
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=============
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CM_BoxLeafnums
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Fills in a list of all the leafs touched
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=============
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*/
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int leaf_count, leaf_maxcount;
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int *leaf_list;
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float *leaf_mins, *leaf_maxs;
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int leaf_topnode;
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void CM_BoxLeafnums_r (model_t *M, int nodenum)
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{
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mplane_t *plane;
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mnode_t *node;
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int s;
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while (1)
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{
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if (nodenum < 0)
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{
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if (leaf_count >= leaf_maxcount)
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{
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// Com_Printf ("CM_BoxLeafnums_r: overflow\n");
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return;
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}
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leaf_list[leaf_count++] = -1 - nodenum;
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return;
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}
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node = &M->nodes[nodenum];
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plane = node->plane;
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// s = BoxOnPlaneSide (leaf_mins, leaf_maxs, plane);
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s = BOX_ON_PLANE_SIDE(leaf_mins, leaf_maxs, plane);
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if (s == 1)
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nodenum = node->ichildren[0];
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else if (s == 2)
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nodenum = node->ichildren[1];
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else
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{ // go down both
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if (leaf_topnode == -1)
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leaf_topnode = nodenum;
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CM_BoxLeafnums_r (M, node->ichildren[0]);
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nodenum = node->ichildren[1];
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}
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}
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}
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int CM_BoxLeafnums_headnode (model_t *M, vec3_t mins, vec3_t maxs, int *list, int listsize, int headnode, int *topnode)
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{
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leaf_list = list;
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leaf_count = 0;
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leaf_maxcount = listsize;
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leaf_mins = mins;
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leaf_maxs = maxs;
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leaf_topnode = -1;
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CM_BoxLeafnums_r (M, headnode);
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if (topnode)
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*topnode = leaf_topnode;
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return leaf_count;
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}
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int CM_BoxLeafnums (model_t *M,vec3_t mins, vec3_t maxs, int *list, int listsize, int *topnode)
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{
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return CM_BoxLeafnums_headnode (M,mins, maxs, list,
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listsize, 0 /*headnode??*/, topnode);
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}
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/*
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==================
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CM_PointContents
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==================
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*/
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int CM_PointContents (model_t *M, vec3_t p, int headnode)
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{
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int l, contents, i, j;
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mleaf_t *leaf;
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mbrush_t *brush;
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mbrushside_t *brushside;
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if (!M->numnodes) // map not loaded
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return 0;
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l = CM_PointLeafnum_r (M, p, 0 /*headnode*/);
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//PENTA: Based on qfusion contents soucre
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leaf = &M->leafs[l];
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if ( leaf->contents & CONTENTS_NODROP ) {
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contents = CONTENTS_NODROP;
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} else {
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contents = 0;
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}
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for (i = 0; i < leaf->numbrushes; i++)
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{
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brush = &M->brushes[M->leafbrushes[leaf->firstbrush + i]];
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// check if brush actually adds something to contents
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if ( (contents & brush->contents) == brush->contents ) {
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continue;
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}
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brushside = &M->brushsides[brush->firstbrushside];
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for ( j = 0; j < brush->numsides; j++, brushside++ )
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{
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if ((DotProduct(p, brushside->plane->normal) -brushside->plane->dist) > 0)
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break;
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}
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if (j == brush->numsides)
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contents |= brush->contents;
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}
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return contents;
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}
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/*
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==================
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CM_TransformedPointContents
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Handles offseting and rotation of the end points for moving and
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rotating entities
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==================
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*/
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int CM_TransformedPointContents (model_t *M, vec3_t p, int headnode, vec3_t origin, vec3_t angles)
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{
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vec3_t p_l;
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vec3_t temp;
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vec3_t forward, right, up;
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int l;
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// subtract origin offset
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VectorSubtract (p, origin, p_l);
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// rotate start and end into the models frame of reference
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if (angles[0] || angles[1] || angles[2])
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{
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AngleVectors (angles, forward, right, up);
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VectorCopy (p_l, temp);
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p_l[0] = DotProduct (temp, forward);
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p_l[1] = -DotProduct (temp, right);
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p_l[2] = DotProduct (temp, up);
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}
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l = CM_PointLeafnum_r (M, p_l, headnode);
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return M->leafs[l].contents;
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}
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/*
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===============================================================================
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BOX TRACING
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===============================================================================
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*/
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// 1/32 epsilon to keep floating point happy
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#define DIST_EPSILON (0.03125)
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vec3_t trace_start, trace_end;
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vec3_t trace_mins, trace_maxs;
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vec3_t trace_extents;
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trace_t trace_trace;
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int trace_contents;
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qboolean trace_ispoint; // optimized case
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/*
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================
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CM_ClipBoxToBrush
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================
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*/
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void CM_ClipBoxToBrush (model_t *M, vec3_t mins, vec3_t maxs, vec3_t p1, vec3_t p2,
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trace_t *trace, mbrush_t *brush)
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{
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int i, j;
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mplane_t *plane, *clipplane;
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float dist;
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float enterfrac, leavefrac;
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vec3_t ofs;
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float d1, d2;
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qboolean getout, startout;
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float f;
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mbrushside_t *side, *leadside;
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enterfrac = -1;
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leavefrac = 1;
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clipplane = NULL;
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if (!brush->numsides)
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return;
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c_brush_traces++;
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getout = false;
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startout = false;
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leadside = NULL;
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for (i=0 ; i<brush->numsides ; i++)
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{
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side = &M->brushsides[brush->firstbrushside+i];
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plane = side->plane;
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// FIXME: special case for axial
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if (!trace_ispoint)
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{ // general box case
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// push the plane out apropriately for mins/maxs
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// FIXME: use signbits into 8 way lookup for each mins/maxs
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for (j=0 ; j<3 ; j++)
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{
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if (plane->normal[j] < 0)
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ofs[j] = maxs[j];
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else
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ofs[j] = mins[j];
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}
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dist = DotProduct (ofs, plane->normal);
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dist = plane->dist - dist;
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}
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else
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{ // special point case
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dist = plane->dist;
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}
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d1 = DotProduct (p1, plane->normal) - dist;
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d2 = DotProduct (p2, plane->normal) - dist;
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if (d2 > 0)
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getout = true; // endpoint is not in solid
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if (d1 > 0)
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startout = true;
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// if completely in front of face, no intersection
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if (d1 > 0 && d2 >= d1)
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return;
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if (d1 <= 0 && d2 <= 0)
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continue;
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// crosses face
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if (d1 > d2)
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{ // enter
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f = (d1-DIST_EPSILON) / (d1-d2);
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if (f > enterfrac)
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{
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enterfrac = f;
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clipplane = plane;
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leadside = side;
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}
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}
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else
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{ // leave
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f = (d1+DIST_EPSILON) / (d1-d2);
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if (f < leavefrac)
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leavefrac = f;
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}
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}
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if (!startout)
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{ // original point was inside brush
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trace->startsolid = true;
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if (!getout)
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trace->allsolid = true;
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return;
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}
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/*if (getout || startout)*/ trace->inopen = true;
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if (enterfrac < leavefrac)
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{
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if (enterfrac > -1 && enterfrac < trace->fraction)
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{
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if (enterfrac < 0)
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enterfrac = 0;
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trace->fraction = enterfrac;
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//trace->plane = *clipplane;
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//trace->surface = &(leadside->surface->c);
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VectorCopy(clipplane->normal,trace->plane.normal);
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trace->plane.dist = clipplane->dist;
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//trace->contents = brush->contents;
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}
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}
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}
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/*
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================
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CM_TestBoxInBrush
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================
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*/
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void CM_TestBoxInBrush (model_t *M, vec3_t mins, vec3_t maxs, vec3_t p1,
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trace_t *trace, mbrush_t *brush)
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{
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int i, j;
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mplane_t *plane;
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float dist;
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vec3_t ofs;
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float d1;
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mbrushside_t *side;
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if (!brush->numsides)
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return;
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for (i=0 ; i<brush->numsides ; i++)
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{
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side = &M->brushsides[brush->firstbrushside+i];
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plane = side->plane;
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// FIXME: special case for axial
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// general box case
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// push the plane out apropriately for mins/maxs
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// FIXME: use signbits into 8 way lookup for each mins/maxs
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for (j=0 ; j<3 ; j++)
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{
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if (plane->normal[j] < 0)
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ofs[j] = maxs[j];
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else
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ofs[j] = mins[j];
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}
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dist = DotProduct (ofs, plane->normal);
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dist = plane->dist - dist;
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d1 = DotProduct (p1, plane->normal) - dist;
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// if completely in front of face, no intersection
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if (d1 > 0) {
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trace->inopen = true;
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return;
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}
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}
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// inside this brush
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trace->startsolid = trace->allsolid = true;
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trace->fraction = 0;
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//trace->contents = brush->contents;
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}
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/*
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================
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CM_TraceToLeaf
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================
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*/
|
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void CM_TraceToLeaf (model_t *M, int leafnum)
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{
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int k;
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int brushnum;
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mleaf_t *leaf;
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mbrush_t *b;
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leaf = &M->leafs[leafnum];
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//if ( !(leaf->contents & trace_contents))
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// return;
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// trace line against all brushes in the leaf
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for (k=0 ; k<leaf->numbrushes ; k++)
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{
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brushnum = M->leafbrushes[leaf->firstbrush+k];
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b = &M->brushes[brushnum];
|
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/*
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Con_Printf("Checkbrush %i",brushnum);
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if (brushnum == 1800) {
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int j;
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for (j=0; j<b->numsides; j++) {
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Con_Printf("Side: %f %f %f %f\n",M->brushsides[j+b->firstbrushside].plane->normal[0],
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M->brushsides[j+b->firstbrushside].plane->normal[1],
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M->brushsides[j+b->firstbrushside].plane->normal[2],
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M->brushsides[j+b->firstbrushside].plane->dist);
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}
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}
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*/
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if (b->checkcount == checkcount)
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continue; // already checked this brush in another leaf
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b->checkcount = checkcount;
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if ( !(b->contents & trace_contents))
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continue;
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CM_ClipBoxToBrush (M, trace_mins, trace_maxs, trace_start, trace_end, &trace_trace, b);
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if (!trace_trace.fraction)
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return;
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
================
|
|
CM_TraceToBrushModel
|
|
|
|
PENTA: Clips to the given brush model
|
|
Q3 doesn't have bsp's associated with map models anymore, just a list of brushes
|
|
================
|
|
*/
|
|
void CM_TraceToBrushModel (model_t *M, int firstbrush, int numbrushes, vec3_t mins, vec3_t maxs,
|
|
vec3_t start, vec3_t end, trace_t *trace, int brushmask)
|
|
{
|
|
int i, brushnum;
|
|
mbrush_t *b;
|
|
|
|
//Con_Printf("CM_TraceToBrushModel");
|
|
|
|
if (!M->numnodes) // map not loaded
|
|
return;
|
|
trace_contents = brushmask;
|
|
trace_ispoint = false;
|
|
|
|
for (i=0; i<numbrushes; i++)
|
|
{
|
|
//brushnum = M->leafbrushes[firstbrush+i];
|
|
b = &M->brushes[firstbrush+i];
|
|
|
|
if ( !(b->contents & trace_contents))
|
|
continue;
|
|
|
|
CM_ClipBoxToBrush (M, mins, maxs, start, end, trace, b);
|
|
if (!trace->fraction)
|
|
return;
|
|
}
|
|
|
|
if (trace->fraction == 1)
|
|
{
|
|
VectorCopy (end, trace->endpos);
|
|
}
|
|
else
|
|
{
|
|
for (i=0 ; i<3 ; i++)
|
|
trace->endpos[i] = start[i] + trace->fraction * (end[i] - start[i]);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
CM_TestInLeaf
|
|
================
|
|
*/
|
|
void CM_TestInLeaf (model_t *M, int leafnum)
|
|
{
|
|
int k;
|
|
int brushnum;
|
|
mleaf_t *leaf;
|
|
mbrush_t *b;
|
|
|
|
leaf = &M->leafs[leafnum];
|
|
//if ( !(leaf->contents & trace_contents))
|
|
// return;
|
|
// trace line against all brushes in the leaf
|
|
for (k=0 ; k<leaf->numbrushes ; k++)
|
|
{
|
|
brushnum = M->leafbrushes[leaf->firstbrush+k];
|
|
b = &M->brushes[brushnum];
|
|
if (b->checkcount == checkcount)
|
|
continue; // already checked this brush in another leaf
|
|
b->checkcount = checkcount;
|
|
|
|
if ( !(b->contents & trace_contents))
|
|
continue;
|
|
CM_TestBoxInBrush (M, trace_mins, trace_maxs, trace_start, &trace_trace, b);
|
|
if (!trace_trace.fraction)
|
|
return;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
==================
|
|
CM_RecursiveHullCheck
|
|
|
|
==================
|
|
*/
|
|
void CM_RecursiveHullCheck (model_t *M, int num, float p1f, float p2f, vec3_t p1, vec3_t p2)
|
|
{
|
|
mnode_t *node;
|
|
mplane_t *plane;
|
|
float t1, t2, offset;
|
|
float frac, frac2;
|
|
float idist;
|
|
int i;
|
|
vec3_t mid;
|
|
int side;
|
|
float midf;
|
|
|
|
if (trace_trace.fraction <= p1f)
|
|
return; // already hit something nearer
|
|
|
|
// if < 0, we are in a leaf node
|
|
if (num < 0)
|
|
{
|
|
CM_TraceToLeaf (M, -1-num);
|
|
return;
|
|
}
|
|
|
|
//
|
|
// find the point distances to the seperating plane
|
|
// and the offset for the size of the box
|
|
//
|
|
node = M->nodes + num;
|
|
plane = node->plane;
|
|
|
|
if (plane->type < 3)
|
|
{
|
|
t1 = p1[plane->type] - plane->dist;
|
|
t2 = p2[plane->type] - plane->dist;
|
|
offset = trace_extents[plane->type];
|
|
}
|
|
else
|
|
{
|
|
t1 = DotProduct (plane->normal, p1) - plane->dist;
|
|
t2 = DotProduct (plane->normal, p2) - plane->dist;
|
|
if (trace_ispoint)
|
|
offset = 0;
|
|
else
|
|
offset = fabs(trace_extents[0]*plane->normal[0]) +
|
|
fabs(trace_extents[1]*plane->normal[1]) +
|
|
fabs(trace_extents[2]*plane->normal[2]);
|
|
}
|
|
|
|
|
|
#if 0
|
|
CM_RecursiveHullCheck (M, node->ichildren[0], p1f, p2f, p1, p2);
|
|
CM_RecursiveHullCheck (M, node->ichildren[1], p1f, p2f, p1, p2);
|
|
return;
|
|
#endif
|
|
|
|
// see which sides we need to consider
|
|
if (t1 >= offset && t2 >= offset)
|
|
{
|
|
CM_RecursiveHullCheck (M, node->ichildren[0], p1f, p2f, p1, p2);
|
|
return;
|
|
}
|
|
if (t1 < -offset && t2 < -offset)
|
|
{
|
|
CM_RecursiveHullCheck (M, node->ichildren[1], p1f, p2f, p1, p2);
|
|
return;
|
|
}
|
|
|
|
// put the crosspoint DIST_EPSILON pixels on the near side
|
|
if (t1 < t2)
|
|
{
|
|
idist = 1.0/(t1-t2);
|
|
side = 1;
|
|
frac2 = (t1 + offset + DIST_EPSILON)*idist;
|
|
frac = (t1 - offset + DIST_EPSILON)*idist;
|
|
}
|
|
else if (t1 > t2)
|
|
{
|
|
idist = 1.0/(t1-t2);
|
|
side = 0;
|
|
frac2 = (t1 - offset - DIST_EPSILON)*idist;
|
|
frac = (t1 + offset + DIST_EPSILON)*idist;
|
|
}
|
|
else
|
|
{
|
|
side = 0;
|
|
frac = 1;
|
|
frac2 = 0;
|
|
}
|
|
|
|
// move up to the node
|
|
if (frac < 0)
|
|
frac = 0;
|
|
if (frac > 1)
|
|
frac = 1;
|
|
|
|
midf = p1f + (p2f - p1f)*frac;
|
|
for (i=0 ; i<3 ; i++)
|
|
mid[i] = p1[i] + frac*(p2[i] - p1[i]);
|
|
|
|
CM_RecursiveHullCheck (M, node->ichildren[side], p1f, midf, p1, mid);
|
|
|
|
|
|
// go past the node
|
|
if (frac2 < 0)
|
|
frac2 = 0;
|
|
if (frac2 > 1)
|
|
frac2 = 1;
|
|
|
|
midf = p1f + (p2f - p1f)*frac2;
|
|
for (i=0 ; i<3 ; i++)
|
|
mid[i] = p1[i] + frac2*(p2[i] - p1[i]);
|
|
|
|
CM_RecursiveHullCheck (M, node->ichildren[side^1], midf, p2f, mid, p2);
|
|
}
|
|
|
|
|
|
|
|
//======================================================================
|
|
|
|
/*
|
|
==================
|
|
CM_BoxTrace
|
|
==================
|
|
*/
|
|
trace_t CM_BoxTrace (model_t *M, vec3_t start, vec3_t end,
|
|
vec3_t mins, vec3_t maxs,
|
|
int headnode, int brushmask)
|
|
{
|
|
int i;
|
|
|
|
// Con_Printf("CM_BoxTrace");
|
|
checkcount++; // for multi-check avoidance
|
|
|
|
c_traces++; // for statistics, may be zeroed
|
|
|
|
// fill in a default trace
|
|
memset (&trace_trace, 0, sizeof(trace_trace));
|
|
trace_trace.fraction = 1;
|
|
//trace_trace.surface = &(nullsurface.c);
|
|
|
|
if (!M->numnodes) // map not loaded
|
|
return trace_trace;
|
|
|
|
trace_contents = brushmask;
|
|
VectorCopy (start, trace_start);
|
|
VectorCopy (end, trace_end);
|
|
VectorCopy (mins, trace_mins);
|
|
VectorCopy (maxs, trace_maxs);
|
|
|
|
//
|
|
// check for position test special case
|
|
//
|
|
if (start[0] == end[0] && start[1] == end[1] && start[2] == end[2])
|
|
{
|
|
int leafs[1024];
|
|
int i, numleafs;
|
|
vec3_t c1, c2;
|
|
int topnode;
|
|
|
|
VectorAdd (start, mins, c1);
|
|
VectorAdd (start, maxs, c2);
|
|
for (i=0 ; i<3 ; i++)
|
|
{
|
|
c1[i] -= 1;
|
|
c2[i] += 1;
|
|
}
|
|
|
|
numleafs = CM_BoxLeafnums_headnode (M, c1, c2, leafs, 1024, headnode, &topnode);
|
|
for (i=0 ; i<numleafs ; i++)
|
|
{
|
|
CM_TestInLeaf (M, leafs[i]);
|
|
if (trace_trace.allsolid)
|
|
break;
|
|
}
|
|
VectorCopy (start, trace_trace.endpos);
|
|
return trace_trace;
|
|
}
|
|
|
|
//
|
|
// check for point special case
|
|
//
|
|
if (mins[0] == 0 && mins[1] == 0 && mins[2] == 0
|
|
&& maxs[0] == 0 && maxs[1] == 0 && maxs[2] == 0)
|
|
{
|
|
trace_ispoint = true;
|
|
VectorClear (trace_extents);
|
|
}
|
|
else
|
|
{
|
|
trace_ispoint = false;
|
|
trace_extents[0] = -mins[0] > maxs[0] ? -mins[0] : maxs[0];
|
|
trace_extents[1] = -mins[1] > maxs[1] ? -mins[1] : maxs[1];
|
|
trace_extents[2] = -mins[2] > maxs[2] ? -mins[2] : maxs[2];
|
|
}
|
|
|
|
//
|
|
// general sweeping through world
|
|
//
|
|
CM_RecursiveHullCheck (M, headnode, 0, 1, start, end);
|
|
|
|
if (trace_trace.fraction == 1)
|
|
{
|
|
VectorCopy (end, trace_trace.endpos);
|
|
}
|
|
else
|
|
{
|
|
for (i=0 ; i<3 ; i++)
|
|
trace_trace.endpos[i] = start[i] + trace_trace.fraction * (end[i] - start[i]);
|
|
}
|
|
return trace_trace;
|
|
}
|
|
|
|
|
|
/*
|
|
==================
|
|
CM_TransformedBoxTrace
|
|
|
|
Handles offseting and rotation of the end points for moving and
|
|
rotating entities
|
|
==================
|
|
*/
|
|
#ifdef _WIN32
|
|
#pragma optimize( "", off )
|
|
#endif
|
|
|
|
|
|
trace_t CM_TransformedBoxTrace (model_t *M, vec3_t start, vec3_t end,
|
|
vec3_t mins, vec3_t maxs,
|
|
int headnode, int brushmask,
|
|
vec3_t origin, vec3_t angles)
|
|
{
|
|
trace_t trace;
|
|
vec3_t start_l, end_l;
|
|
vec3_t a;
|
|
vec3_t forward, right, up;
|
|
vec3_t temp;
|
|
qboolean rotated;
|
|
|
|
// subtract origin offset
|
|
VectorSubtract (start, origin, start_l);
|
|
VectorSubtract (end, origin, end_l);
|
|
|
|
// rotate start and end into the models frame of reference
|
|
if (angles[0] || angles[1] || angles[2] )
|
|
rotated = true;
|
|
else
|
|
rotated = false;
|
|
|
|
if (rotated)
|
|
{
|
|
AngleVectors (angles, forward, right, up);
|
|
|
|
VectorCopy (start_l, temp);
|
|
start_l[0] = DotProduct (temp, forward);
|
|
start_l[1] = -DotProduct (temp, right);
|
|
start_l[2] = DotProduct (temp, up);
|
|
|
|
VectorCopy (end_l, temp);
|
|
end_l[0] = DotProduct (temp, forward);
|
|
end_l[1] = -DotProduct (temp, right);
|
|
end_l[2] = DotProduct (temp, up);
|
|
}
|
|
|
|
// sweep the box through the model
|
|
trace = CM_BoxTrace (M, start_l, end_l, mins, maxs, headnode, brushmask);
|
|
|
|
if (rotated && trace.fraction != 1.0)
|
|
{
|
|
// FIXME: figure out how to do this with existing angles
|
|
VectorNegate (angles, a);
|
|
AngleVectors (a, forward, right, up);
|
|
|
|
VectorCopy (trace.plane.normal, temp);
|
|
trace.plane.normal[0] = DotProduct (temp, forward);
|
|
trace.plane.normal[1] = -DotProduct (temp, right);
|
|
trace.plane.normal[2] = DotProduct (temp, up);
|
|
}
|
|
|
|
trace.endpos[0] = start[0] + trace.fraction * (end[0] - start[0]);
|
|
trace.endpos[1] = start[1] + trace.fraction * (end[1] - start[1]);
|
|
trace.endpos[2] = start[2] + trace.fraction * (end[2] - start[2]);
|
|
|
|
return trace;
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
#pragma optimize( "", on )
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
===============================================================================
|
|
|
|
PVS / PHS
|
|
|
|
===============================================================================
|
|
*/
|
|
|
|
/*
|
|
===================
|
|
CM_DecompressVis
|
|
===================
|
|
*/
|
|
/*
|
|
void CM_DecompressVis (byte *in, byte *out)
|
|
{
|
|
int c;
|
|
byte *out_p;
|
|
int row;
|
|
|
|
row = (numclusters+7)>>3;
|
|
out_p = out;
|
|
|
|
if (!in || !numvisibility)
|
|
{ // no vis info, so make all visible
|
|
while (row)
|
|
{
|
|
*out_p++ = 0xff;
|
|
row--;
|
|
}
|
|
return;
|
|
}
|
|
|
|
do
|
|
{
|
|
if (*in)
|
|
{
|
|
*out_p++ = *in++;
|
|
continue;
|
|
}
|
|
|
|
c = in[1];
|
|
in += 2;
|
|
if ((out_p - out) + c > row)
|
|
{
|
|
c = row - (out_p - out);
|
|
Com_DPrintf ("warning: Vis decompression overrun\n");
|
|
}
|
|
while (c)
|
|
{
|
|
*out_p++ = 0;
|
|
c--;
|
|
}
|
|
} while (out_p - out < row);
|
|
}
|
|
|
|
byte pvsrow[MAX_MAP_LEAFS/8];
|
|
byte phsrow[MAX_MAP_LEAFS/8];
|
|
|
|
byte *CM_ClusterPVS (int cluster)
|
|
{
|
|
if (cluster == -1)
|
|
memset (pvsrow, 0, (numclusters+7)>>3);
|
|
else
|
|
CM_DecompressVis (map_visibility + map_vis->bitofs[cluster][DVIS_PVS], pvsrow);
|
|
return pvsrow;
|
|
}
|
|
|
|
byte *CM_ClusterPHS (int cluster)
|
|
{
|
|
if (cluster == -1)
|
|
memset (phsrow, 0, (numclusters+7)>>3);
|
|
else
|
|
CM_DecompressVis (map_visibility + map_vis->bitofs[cluster][DVIS_PHS], phsrow);
|
|
return phsrow;
|
|
}
|
|
|
|
*/
|
|
/*
|
|
===============================================================================
|
|
|
|
AREAPORTALS
|
|
|
|
PENTA: Areaportals seem to have changed somewhat from quake2
|
|
this is based on the qfusion source who supports quake3 style areaportals
|
|
===============================================================================
|
|
*/
|
|
|
|
/*
|
|
====================
|
|
FloodAreaConnections
|
|
|
|
|
|
====================
|
|
*/
|
|
void FloodAreaConnections (model_t *M)
|
|
{
|
|
int i, j;
|
|
|
|
// area 0 is not used
|
|
for (i=1 ; i<M->numareas ; i++)
|
|
{
|
|
for ( j = 1; j < M->numareas; j++ ) {
|
|
M->areas[i].numareaportals[j] = ( j == i );
|
|
}
|
|
}
|
|
}
|
|
|
|
void CM_SetAreaPortalState (model_t *M, int area1, int area2, qboolean open)
|
|
{
|
|
if (area1 > M->numareas || area2 > M->numareas) {
|
|
Con_Printf ("CM_SetAreaPortalState: area > M->numareas\n");
|
|
return;
|
|
}
|
|
if ( open ) {
|
|
M->areas[area1].numareaportals[area2]++;
|
|
M->areas[area2].numareaportals[area1]++;
|
|
Con_Printf("Open portal between %i and %i\n", area1, area2);
|
|
} else {
|
|
M->areas[area1].numareaportals[area2]--;
|
|
//shouln't really happen
|
|
if (M->areas[area1].numareaportals[area2] < 0)
|
|
M->areas[area1].numareaportals[area2] = 0;
|
|
|
|
M->areas[area2].numareaportals[area1]--;
|
|
//shouln't really happen
|
|
if (M->areas[area2].numareaportals[area1] < 0)
|
|
M->areas[area2].numareaportals[area1] = 0;
|
|
|
|
Con_Printf("Close portal between %i and %i\n", area1, area2);
|
|
}
|
|
}
|
|
|
|
qboolean CM_AreasConnected (model_t *M, int area1, int area2)
|
|
{
|
|
int i;
|
|
/*
|
|
if (cm_noAreas->value)
|
|
return true;
|
|
*/
|
|
if (area1 > M->numareas || area2 > M->numareas)
|
|
Sys_Error ("CM_AreasConnected: area > numareas");
|
|
|
|
if ( M->areas[area1].numareaportals[area2] )
|
|
return true;
|
|
|
|
// area 0 is not used
|
|
for (i=1 ; i<M->numareas ; i++)
|
|
{
|
|
if ( M->areas[i].numareaportals[area1] &&
|
|
M->areas[i].numareaportals[area2] )
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
/*
|
|
=================
|
|
CM_WriteAreaBits
|
|
|
|
Writes a length byte followed by a bit vector of all the areas
|
|
that area in the same flood as the area parameter
|
|
|
|
This is used by the client refreshes to cull visibility
|
|
=================
|
|
*/
|
|
int CM_WriteAreaBits (model_t *M, byte *buffer, int area)
|
|
{
|
|
int i;
|
|
int bytes;
|
|
|
|
bytes = (M->numareas+7)>>3;
|
|
/*
|
|
if (cm_noAreas->value)
|
|
{ // for debugging, send everything
|
|
memset (buffer, 255, bytes);
|
|
}
|
|
else
|
|
*/
|
|
{
|
|
memset (buffer, 0, bytes);
|
|
|
|
for (i=1 ; i<M->numareas ; i++)
|
|
{
|
|
if (!area || CM_AreasConnected (M, i, area ) || i == area)
|
|
buffer[i>>3] |= 1<<(i&7);
|
|
}
|
|
}
|
|
|
|
buffer[area>>3] |= 1<<(area&7);
|
|
|
|
return bytes;
|
|
}
|
|
|
|
/*
|
|
=================
|
|
CM_MergeAreaBits
|
|
=================
|
|
*/
|
|
void CM_MergeAreaBits (model_t *M, byte *buffer, int area)
|
|
{
|
|
int i;
|
|
|
|
for (i=1 ; i<M->numareas ; i++)
|
|
{
|
|
if ( CM_AreasConnected (M, i, area ) || i == area)
|
|
buffer[i>>3] |= 1<<(i&7);
|
|
}
|
|
}
|
|
|
|
/*
|
|
===================
|
|
CM_WritePortalState
|
|
|
|
Writes the portal state to a savegame file
|
|
===================
|
|
*/
|
|
void CM_WritePortalState (model_t *M, FILE *f)
|
|
{
|
|
}
|
|
|
|
/*
|
|
===================
|
|
CM_ReadPortalState
|
|
|
|
Reads the portal state from a savegame file
|
|
and recalculates the area connections
|
|
===================
|
|
*/
|
|
void CM_ReadPortalState (model_t *M, FILE *f)
|
|
{
|
|
}
|
|
|
|
/*
|
|
=============
|
|
CM_HeadnodeVisible
|
|
|
|
Returns true if any leaf under headnode has a cluster that
|
|
is potentially visible
|
|
=============
|
|
*/
|
|
/*
|
|
qboolean CM_HeadnodeVisible (int nodenum, byte *visbits)
|
|
{
|
|
int leafnum;
|
|
int cluster;
|
|
mnode_t *node;
|
|
|
|
if (nodenum < 0)
|
|
{
|
|
leafnum = -1-nodenum;
|
|
cluster = map_leafs[leafnum].cluster;
|
|
if (cluster == -1)
|
|
return false;
|
|
if (visbits[cluster>>3] & (1<<(cluster&7)))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
node = &map_nodes[nodenum];
|
|
if (CM_HeadnodeVisible(node->ichildren[0], visbits))
|
|
return true;
|
|
return CM_HeadnodeVisible(node->ichildren[1], visbits);
|
|
}
|
|
*/ |