From 952c5c128f9efaea89d41d882c4ea3ade7df4591 Mon Sep 17 00:00:00 2001 From: zakk Date: Fri, 26 Aug 2005 04:48:05 +0000 Subject: Itsa me, quake3io! git-svn-id: svn://svn.icculus.org/quake3/trunk@2 edf5b092-35ff-0310-97b2-ce42778d08ea --- code/bspc/csg.c | 1005 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1005 insertions(+) create mode 100755 code/bspc/csg.c (limited to 'code/bspc/csg.c') diff --git a/code/bspc/csg.c b/code/bspc/csg.c new file mode 100755 index 0000000..c141075 --- /dev/null +++ b/code/bspc/csg.c @@ -0,0 +1,1005 @@ +/* +=========================================================================== +Copyright (C) 1999-2005 Id Software, Inc. + +This file is part of Quake III Arena source code. + +Quake III Arena source code is free software; you can redistribute it +and/or modify it under the terms of the GNU General Public License as +published by the Free Software Foundation; either version 2 of the License, +or (at your option) any later version. + +Quake III Arena source code is distributed in the hope that it will be +useful, but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with Foobar; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +=========================================================================== +*/ + +#include "qbsp.h" + +/* + +tag all brushes with original contents +brushes may contain multiple contents +there will be no brush overlap after csg phase + +*/ + +int minplanenums[3]; +int maxplanenums[3]; + +//=========================================================================== +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +void CheckBSPBrush(bspbrush_t *brush) +{ + int i, j; + plane_t *plane1, *plane2; + + //check if the brush is convex... flipped planes make a brush non-convex + for (i = 0; i < brush->numsides; i++) + { + for (j = 0; j < brush->numsides; j++) + { + if (i == j) continue; + plane1 = &mapplanes[brush->sides[i].planenum]; + plane2 = &mapplanes[brush->sides[j].planenum]; + // + if (WindingsNonConvex(brush->sides[i].winding, + brush->sides[j].winding, + plane1->normal, plane2->normal, + plane1->dist, plane2->dist)) + { + Log_Print("non convex brush"); + break; + } //end if + } //end for + } //end for + BoundBrush(brush); + //check for out of bound brushes + for (i = 0; i < 3; i++) + { + if (brush->mins[i] < -MAX_MAP_BOUNDS || brush->maxs[i] > MAX_MAP_BOUNDS) + { + Log_Print("brush: bounds out of range\n"); + Log_Print("ob->mins[%d] = %f, ob->maxs[%d] = %f\n", i, brush->mins[i], i, brush->maxs[i]); + break; + } //end if + if (brush->mins[i] > MAX_MAP_BOUNDS || brush->maxs[i] < -MAX_MAP_BOUNDS) + { + Log_Print("brush: no visible sides on brush\n"); + Log_Print("ob->mins[%d] = %f, ob->maxs[%d] = %f\n", i, brush->mins[i], i, brush->maxs[i]); + break; + } //end if + } //end for +} //end of the function CheckBSPBrush +//=========================================================================== +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +void BSPBrushWindings(bspbrush_t *brush) +{ + int i, j; + winding_t *w; + plane_t *plane; + + for (i = 0; i < brush->numsides; i++) + { + plane = &mapplanes[brush->sides[i].planenum]; + w = BaseWindingForPlane(plane->normal, plane->dist); + for (j = 0; j < brush->numsides && w; j++) + { + if (i == j) continue; + plane = &mapplanes[brush->sides[j].planenum^1]; + ChopWindingInPlace(&w, plane->normal, plane->dist, 0); //CLIP_EPSILON); + } //end for + brush->sides[i].winding = w; + } //end for +} //end of the function BSPBrushWindings +//=========================================================================== +// NOTE: can't keep brush->original intact +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +bspbrush_t *TryMergeBrushes(bspbrush_t *brush1, bspbrush_t *brush2) +{ + int i, j, k, n, shared; + side_t *side1, *side2, *cs; + plane_t *plane1, *plane2; + bspbrush_t *newbrush; + + //check for bounding box overlapp + for (i = 0; i < 3; i++) + { + if (brush1->mins[i] > brush2->maxs[i] + 2 + || brush1->maxs[i] < brush2->mins[i] - 2) + { + return NULL; + } //end if + } //end for + // + shared = 0; + //check if the brush is convex... flipped planes make a brush non-convex + for (i = 0; i < brush1->numsides; i++) + { + side1 = &brush1->sides[i]; + //don't check the "shared" sides + for (k = 0; k < brush2->numsides; k++) + { + side2 = &brush2->sides[k]; + if (side1->planenum == (side2->planenum^1)) + { + shared++; + //there may only be ONE shared side + if (shared > 1) return NULL; + break; + } //end if + } //end for + if (k < brush2->numsides) continue; + // + for (j = 0; j < brush2->numsides; j++) + { + side2 = &brush2->sides[j]; + //don't check the "shared" sides + for (n = 0; n < brush1->numsides; n++) + { + side1 = &brush1->sides[n]; + if (side1->planenum == (side2->planenum^1)) break; + } //end for + if (n < brush1->numsides) continue; + // + side1 = &brush1->sides[i]; + //if the side is in the same plane + //* + if (side1->planenum == side2->planenum) + { + if (side1->texinfo != TEXINFO_NODE && + side2->texinfo != TEXINFO_NODE && + side1->texinfo != side2->texinfo) return NULL; + continue; + } //end if + // + plane1 = &mapplanes[side1->planenum]; + plane2 = &mapplanes[side2->planenum]; + // + if (WindingsNonConvex(side1->winding, side2->winding, + plane1->normal, plane2->normal, + plane1->dist, plane2->dist)) + { + return NULL; + } //end if + } //end for + } //end for + newbrush = AllocBrush(brush1->numsides + brush2->numsides); + newbrush->original = brush1->original; + newbrush->numsides = 0; + //newbrush->side = brush1->side; //brush contents + //fix texinfos for sides lying in the same plane + for (i = 0; i < brush1->numsides; i++) + { + side1 = &brush1->sides[i]; + // + for (n = 0; n < brush2->numsides; n++) + { + side2 = &brush2->sides[n]; + //if both sides are in the same plane get the texinfo right + if (side1->planenum == side2->planenum) + { + if (side1->texinfo == TEXINFO_NODE) side1->texinfo = side2->texinfo; + if (side2->texinfo == TEXINFO_NODE) side2->texinfo = side1->texinfo; + } //end if + } //end for + } //end for + // + for (i = 0; i < brush1->numsides; i++) + { + side1 = &brush1->sides[i]; + //don't add the "shared" sides + for (n = 0; n < brush2->numsides; n++) + { + side2 = &brush2->sides[n]; + if (side1->planenum == (side2->planenum ^ 1)) break; + } //end for + if (n < brush2->numsides) continue; + // + for (n = 0; n < newbrush->numsides; n++) + { + cs = &newbrush->sides[n]; + if (cs->planenum == side1->planenum) + { + Log_Print("brush duplicate plane\n"); + break; + } //end if + } //end if + if (n < newbrush->numsides) continue; + //add this side + cs = &newbrush->sides[newbrush->numsides]; + newbrush->numsides++; + *cs = *side1; + } //end for + for (j = 0; j < brush2->numsides; j++) + { + side2 = &brush2->sides[j]; + for (n = 0; n < brush1->numsides; n++) + { + side1 = &brush1->sides[n]; + //if the side is in the same plane + if (side2->planenum == side1->planenum) break; + //don't add the "shared" sides + if (side2->planenum == (side1->planenum ^ 1)) break; + } //end for + if (n < brush1->numsides) continue; + // + for (n = 0; n < newbrush->numsides; n++) + { + cs = &newbrush->sides[n]; + if (cs->planenum == side2->planenum) + { + Log_Print("brush duplicate plane\n"); + break; + } //end if + } //end if + if (n < newbrush->numsides) continue; + //add this side + cs = &newbrush->sides[newbrush->numsides]; + newbrush->numsides++; + *cs = *side2; + } //end for + BSPBrushWindings(newbrush); + BoundBrush(newbrush); + CheckBSPBrush(newbrush); + return newbrush; +} //end of the function TryMergeBrushes +//=========================================================================== +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +bspbrush_t *MergeBrushes(bspbrush_t *brushlist) +{ + int nummerges, merged; + bspbrush_t *b1, *b2, *tail, *newbrush, *newbrushlist; + bspbrush_t *lastb2; + + if (!brushlist) return NULL; + + qprintf("%5d brushes merged", nummerges = 0); + do + { + for (tail = brushlist; tail; tail = tail->next) + { + if (!tail->next) break; + } //end for + merged = 0; + newbrushlist = NULL; + for (b1 = brushlist; b1; b1 = brushlist) + { + lastb2 = b1; + for (b2 = b1->next; b2; b2 = b2->next) + { + //if the brushes don't have the same contents + if (b1->original->contents != b2->original->contents || + b1->original->expansionbbox != b2->original->expansionbbox) newbrush = NULL; + else newbrush = TryMergeBrushes(b1, b2); + if (newbrush) + { + tail->next = newbrush; + lastb2->next = b2->next; + brushlist = brushlist->next; + FreeBrush(b1); + FreeBrush(b2); + for (tail = brushlist; tail; tail = tail->next) + { + if (!tail->next) break; + } //end for + merged++; + qprintf("\r%5d", nummerges++); + break; + } //end if + lastb2 = b2; + } //end for + //if b1 can't be merged with any of the other brushes + if (!b2) + { + brushlist = brushlist->next; + //keep b1 + b1->next = newbrushlist; + newbrushlist = b1; + } //end else + } //end for + brushlist = newbrushlist; + } while(merged); + qprintf("\n"); + return newbrushlist; +} //end of the function MergeBrushes +//=========================================================================== +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +void SplitBrush2 (bspbrush_t *brush, int planenum, + bspbrush_t **front, bspbrush_t **back) +{ + SplitBrush (brush, planenum, front, back); +#if 0 + if (*front && (*front)->sides[(*front)->numsides-1].texinfo == -1) + (*front)->sides[(*front)->numsides-1].texinfo = (*front)->sides[0].texinfo; // not -1 + if (*back && (*back)->sides[(*back)->numsides-1].texinfo == -1) + (*back)->sides[(*back)->numsides-1].texinfo = (*back)->sides[0].texinfo; // not -1 +#endif +} //end of the function SplitBrush2 +//=========================================================================== +// Returns a list of brushes that remain after B is subtracted from A. +// May by empty if A is contained inside B. +// The originals are undisturbed. +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +bspbrush_t *SubtractBrush (bspbrush_t *a, bspbrush_t *b) +{ // a - b = out (list) + int i; + bspbrush_t *front, *back; + bspbrush_t *out, *in; + + in = a; + out = NULL; + for (i = 0; i < b->numsides && in; i++) + { + SplitBrush2(in, b->sides[i].planenum, &front, &back); + if (in != a) FreeBrush(in); + if (front) + { // add to list + front->next = out; + out = front; + } //end if + in = back; + } //end for + if (in) + { + FreeBrush (in); + } //end if + else + { // didn't really intersect + FreeBrushList (out); + return a; + } //end else + return out; +} //end of the function SubtractBrush +//=========================================================================== +// Returns a single brush made up by the intersection of the +// two provided brushes, or NULL if they are disjoint. +// +// The originals are undisturbed. +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +bspbrush_t *IntersectBrush (bspbrush_t *a, bspbrush_t *b) +{ + int i; + bspbrush_t *front, *back; + bspbrush_t *in; + + in = a; + for (i=0 ; inumsides && in ; i++) + { + SplitBrush2(in, b->sides[i].planenum, &front, &back); + if (in != a) FreeBrush(in); + if (front) FreeBrush(front); + in = back; + } //end for + + if (in == a) return NULL; + + in->next = NULL; + return in; +} //end of the function IntersectBrush +//=========================================================================== +// Returns true if the two brushes definately do not intersect. +// There will be false negatives for some non-axial combinations. +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +qboolean BrushesDisjoint (bspbrush_t *a, bspbrush_t *b) +{ + int i, j; + + // check bounding boxes + for (i=0 ; i<3 ; i++) + if (a->mins[i] >= b->maxs[i] + || a->maxs[i] <= b->mins[i]) + return true; // bounding boxes don't overlap + + // check for opposing planes + for (i=0 ; inumsides ; i++) + { + for (j=0 ; jnumsides ; j++) + { + if (a->sides[i].planenum == + (b->sides[j].planenum^1) ) + return true; // opposite planes, so not touching + } + } + + return false; // might intersect +} //end of the function BrushesDisjoint +//=========================================================================== +// Returns a content word for the intersection of two brushes. +// Some combinations will generate a combination (water + clip), +// but most will be the stronger of the two contents. +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +int IntersectionContents (int c1, int c2) +{ + int out; + + out = c1 | c2; + + if (out & CONTENTS_SOLID) out = CONTENTS_SOLID; + + return out; +} //end of the function IntersectionContents +//=========================================================================== +// Any planes shared with the box edge will be set to no texinfo +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +bspbrush_t *ClipBrushToBox(bspbrush_t *brush, vec3_t clipmins, vec3_t clipmaxs) +{ + int i, j; + bspbrush_t *front, *back; + int p; + + for (j=0 ; j<2 ; j++) + { + if (brush->maxs[j] > clipmaxs[j]) + { + SplitBrush (brush, maxplanenums[j], &front, &back); + if (front) + FreeBrush (front); + brush = back; + if (!brush) + return NULL; + } + if (brush->mins[j] < clipmins[j]) + { + SplitBrush (brush, minplanenums[j], &front, &back); + if (back) + FreeBrush (back); + brush = front; + if (!brush) + return NULL; + } + } + + // remove any colinear faces + + for (i=0 ; inumsides ; i++) + { + p = brush->sides[i].planenum & ~1; + if (p == maxplanenums[0] || p == maxplanenums[1] + || p == minplanenums[0] || p == minplanenums[1]) + { + brush->sides[i].texinfo = TEXINFO_NODE; + brush->sides[i].flags &= ~SFL_VISIBLE; + } + } + return brush; +} //end of the function ClipBrushToBox +//=========================================================================== +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +bspbrush_t *MakeBspBrushList(int startbrush, int endbrush, + vec3_t clipmins, vec3_t clipmaxs) +{ + mapbrush_t *mb; + bspbrush_t *brushlist, *newbrush; + int i, j; + int c_faces; + int c_brushes; + int numsides; + int vis; + vec3_t normal; + float dist; + + for (i=0 ; i<2 ; i++) + { + VectorClear (normal); + normal[i] = 1; + dist = clipmaxs[i]; + maxplanenums[i] = FindFloatPlane(normal, dist); + dist = clipmins[i]; + minplanenums[i] = FindFloatPlane(normal, dist); + } + + brushlist = NULL; + c_faces = 0; + c_brushes = 0; + + for (i=startbrush ; inumsides; + if (!numsides) + continue; + + // make sure the brush has at least one face showing + vis = 0; + for (j=0 ; joriginal_sides[j].flags & SFL_VISIBLE) && mb->original_sides[j].winding) + vis++; +#if 0 + if (!vis) + continue; // no faces at all +#endif + // if the brush is outside the clip area, skip it + for (j=0 ; j<3 ; j++) + if (mb->mins[j] >= clipmaxs[j] + || mb->maxs[j] <= clipmins[j]) + break; + if (j != 3) + continue; + + // + // make a copy of the brush + // + newbrush = AllocBrush (mb->numsides); + newbrush->original = mb; + newbrush->numsides = mb->numsides; + memcpy (newbrush->sides, mb->original_sides, numsides*sizeof(side_t)); + for (j=0 ; jsides[j].winding) + newbrush->sides[j].winding = CopyWinding (newbrush->sides[j].winding); + if (newbrush->sides[j].surf & SURF_HINT) + newbrush->sides[j].flags |= SFL_VISIBLE; // hints are always visible + } + VectorCopy (mb->mins, newbrush->mins); + VectorCopy (mb->maxs, newbrush->maxs); + + // + // carve off anything outside the clip box + // + newbrush = ClipBrushToBox (newbrush, clipmins, clipmaxs); + if (!newbrush) + continue; + + c_faces += vis; + c_brushes++; + + newbrush->next = brushlist; + brushlist = newbrush; + } + + return brushlist; +} //end of the function MakeBspBrushList +//=========================================================================== +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +bspbrush_t *AddBrushListToTail (bspbrush_t *list, bspbrush_t *tail) +{ + bspbrush_t *walk, *next; + + for (walk=list ; walk ; walk=next) + { // add to end of list + next = walk->next; + walk->next = NULL; + tail->next = walk; + tail = walk; + } //end for + return tail; +} //end of the function AddBrushListToTail +//=========================================================================== +// Builds a new list that doesn't hold the given brush +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +bspbrush_t *CullList(bspbrush_t *list, bspbrush_t *skip1) +{ + bspbrush_t *newlist; + bspbrush_t *next; + + newlist = NULL; + + for ( ; list ; list = next) + { + next = list->next; + if (list == skip1) + { + FreeBrush (list); + continue; + } + list->next = newlist; + newlist = list; + } + return newlist; +} //end of the function CullList +//=========================================================================== +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +/* +void WriteBrushMap(char *name, bspbrush_t *list) +{ + FILE *f; + side_t *s; + int i; + winding_t *w; + + Log_Print("writing %s\n", name); + f = fopen (name, "wb"); + if (!f) + Error ("Can't write %s\b", name); + + fprintf (f, "{\n\"classname\" \"worldspawn\"\n"); + + for ( ; list ; list=list->next ) + { + fprintf (f, "{\n"); + for (i=0,s=list->sides ; inumsides ; i++,s++) + { + w = BaseWindingForPlane (mapplanes[s->planenum].normal, mapplanes[s->planenum].dist); + + fprintf (f,"( %i %i %i ) ", (int)w->p[0][0], (int)w->p[0][1], (int)w->p[0][2]); + fprintf (f,"( %i %i %i ) ", (int)w->p[1][0], (int)w->p[1][1], (int)w->p[1][2]); + fprintf (f,"( %i %i %i ) ", (int)w->p[2][0], (int)w->p[2][1], (int)w->p[2][2]); + + fprintf (f, "%s 0 0 0 1 1\n", texinfo[s->texinfo].texture); + FreeWinding (w); + } + fprintf (f, "}\n"); + } + fprintf (f, "}\n"); + + fclose (f); +} //end of the function WriteBrushMap +*/ +//=========================================================================== +// Returns true if b1 is allowed to bite b2 +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +qboolean BrushGE (bspbrush_t *b1, bspbrush_t *b2) +{ +#ifdef ME + if (create_aas) + { + if (b1->original->expansionbbox != b2->original->expansionbbox) + { + return false; + } //end if + //never have something else bite a ladder brush + //never have a ladder brush bite something else + if ( (b1->original->contents & CONTENTS_LADDER) + && !(b2->original->contents & CONTENTS_LADDER)) + { + return false; + } //end if + } //end if +#endif //ME + // detail brushes never bite structural brushes + if ( (b1->original->contents & CONTENTS_DETAIL) + && !(b2->original->contents & CONTENTS_DETAIL) ) + { + return false; + } //end if + if (b1->original->contents & CONTENTS_SOLID) + { + return true; + } //end if + return false; +} //end of the function BrushGE +//=========================================================================== +// Carves any intersecting solid brushes into the minimum number +// of non-intersecting brushes. +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +bspbrush_t *ChopBrushes (bspbrush_t *head) +{ + bspbrush_t *b1, *b2, *next; + bspbrush_t *tail; + bspbrush_t *keep; + bspbrush_t *sub, *sub2; + int c1, c2; + int num_csg_iterations; + + Log_Print("-------- Brush CSG ---------\n"); + Log_Print("%6d original brushes\n", CountBrushList (head)); + + num_csg_iterations = 0; + qprintf("%6d output brushes", num_csg_iterations); + +#if 0 + if (startbrush == 0) + WriteBrushList ("before.gl", head, false); +#endif + keep = NULL; + +newlist: + // find tail + if (!head) return NULL; + + for (tail = head; tail->next; tail = tail->next) + ; + + for (b1=head ; b1 ; b1=next) + { + next = b1->next; + + //if the conversion is cancelled + if (cancelconversion) + { + b1->next = keep; + keep = b1; + continue; + } //end if + + for (b2 = b1->next; b2; b2 = b2->next) + { + if (BrushesDisjoint (b1, b2)) + continue; + + sub = NULL; + sub2 = NULL; + c1 = 999999; + c2 = 999999; + + if (BrushGE (b2, b1)) + { + sub = SubtractBrush (b1, b2); + if (sub == b1) + { + continue; // didn't really intersect + } //end if + if (!sub) + { // b1 is swallowed by b2 + head = CullList (b1, b1); + goto newlist; + } + c1 = CountBrushList (sub); + } + + if ( BrushGE (b1, b2) ) + { + sub2 = SubtractBrush (b2, b1); + if (sub2 == b2) + continue; // didn't really intersect + if (!sub2) + { // b2 is swallowed by b1 + FreeBrushList (sub); + head = CullList (b1, b2); + goto newlist; + } + c2 = CountBrushList (sub2); + } + + if (!sub && !sub2) + continue; // neither one can bite + + // only accept if it didn't fragment + // (commenting this out allows full fragmentation) + if (c1 > 1 && c2 > 1) + { + if (sub2) + FreeBrushList (sub2); + if (sub) + FreeBrushList (sub); + continue; + } + + if (c1 < c2) + { + if (sub2) FreeBrushList (sub2); + tail = AddBrushListToTail (sub, tail); + head = CullList (b1, b1); + goto newlist; + } //end if + else + { + if (sub) FreeBrushList (sub); + tail = AddBrushListToTail (sub2, tail); + head = CullList (b1, b2); + goto newlist; + } //end else + } //end for + + if (!b2) + { // b1 is no longer intersecting anything, so keep it + b1->next = keep; + keep = b1; + } //end if + num_csg_iterations++; + qprintf("\r%6d", num_csg_iterations); + } //end for + + if (cancelconversion) return keep; + // + qprintf("\n"); + Log_Write("%6d output brushes\r\n", num_csg_iterations); + +#if 0 + { + WriteBrushList ("after.gl", keep, false); + WriteBrushMap ("after.map", keep); + } +#endif + + return keep; +} //end of the function ChopBrushes +//=========================================================================== +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +bspbrush_t *InitialBrushList (bspbrush_t *list) +{ + bspbrush_t *b; + bspbrush_t *out, *newb; + int i; + + // only return brushes that have visible faces + out = NULL; + for (b=list ; b ; b=b->next) + { +#if 0 + for (i=0 ; inumsides ; i++) + if (b->sides[i].flags & SFL_VISIBLE) + break; + if (i == b->numsides) + continue; +#endif + newb = CopyBrush (b); + newb->next = out; + out = newb; + + // clear visible, so it must be set by MarkVisibleFaces_r + // to be used in the optimized list + for (i=0 ; inumsides ; i++) + { + newb->sides[i].original = &b->sides[i]; +// newb->sides[i].visible = true; + b->sides[i].flags &= ~SFL_VISIBLE; + } + } + + return out; +} //end of the function InitialBrushList +//=========================================================================== +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +bspbrush_t *OptimizedBrushList (bspbrush_t *list) +{ + bspbrush_t *b; + bspbrush_t *out, *newb; + int i; + + // only return brushes that have visible faces + out = NULL; + for (b=list ; b ; b=b->next) + { + for (i=0 ; inumsides ; i++) + if (b->sides[i].flags & SFL_VISIBLE) + break; + if (i == b->numsides) + continue; + newb = CopyBrush (b); + newb->next = out; + out = newb; + } //end for + +// WriteBrushList ("vis.gl", out, true); + return out; +} //end of the function OptimizeBrushList +//=========================================================================== +// +// Parameter: - +// Returns: - +// Changes Globals: - +//=========================================================================== +tree_t *ProcessWorldBrushes(int brush_start, int brush_end) +{ + bspbrush_t *brushes; + tree_t *tree; + node_t *node; + vec3_t mins, maxs; + + //take the whole world + mins[0] = map_mins[0] - 8; + mins[1] = map_mins[1] - 8; + mins[2] = map_mins[2] - 8; + + maxs[0] = map_maxs[0] + 8; + maxs[1] = map_maxs[1] + 8; + maxs[2] = map_maxs[2] + 8; + + //reset the brush bsp + ResetBrushBSP(); + + // the makelist and chopbrushes could be cached between the passes... + + //create a list with brushes that are within the given mins/maxs + //some brushes will be cut and only the part that falls within the + //mins/maxs will be in the bush list + brushes = MakeBspBrushList(brush_start, brush_end, mins, maxs); + // + + if (!brushes) + { + node = AllocNode (); + node->planenum = PLANENUM_LEAF; + node->contents = CONTENTS_SOLID; + + tree = Tree_Alloc(); + tree->headnode = node; + VectorCopy(mins, tree->mins); + VectorCopy(maxs, tree->maxs); + } //end if + else + { + //Carves any intersecting solid brushes into the minimum number + //of non-intersecting brushes. + if (!nocsg) + { + brushes = ChopBrushes(brushes); + /* + if (create_aas) + { + brushes = MergeBrushes(brushes); + } //end if*/ + } //end if + //if the conversion is cancelled + if (cancelconversion) + { + FreeBrushList(brushes); + return NULL; + } //end if + //create the actual bsp tree + tree = BrushBSP(brushes, mins, maxs); + } //end else + //return the tree + return tree; +} //end of the function ProcessWorldBrushes -- cgit v1.2.3