diff options
author | zakk <zakk@edf5b092-35ff-0310-97b2-ce42778d08ea> | 2005-08-26 17:39:27 +0000 |
---|---|---|
committer | zakk <zakk@edf5b092-35ff-0310-97b2-ce42778d08ea> | 2005-08-26 17:39:27 +0000 |
commit | 6bf20c78f5b69d40bcc4931df93d29198435ab67 (patch) | |
tree | e3eda937a05d7db42de725b7013bd0344b987f34 /q3map/brush.c | |
parent | 872d4d7f55af706737ffb361bb76ad13e7496770 (diff) | |
download | ioquake3-aero-6bf20c78f5b69d40bcc4931df93d29198435ab67.tar.gz ioquake3-aero-6bf20c78f5b69d40bcc4931df93d29198435ab67.zip |
newlines fixed
git-svn-id: svn://svn.icculus.org/quake3/trunk@6 edf5b092-35ff-0310-97b2-ce42778d08ea
Diffstat (limited to 'q3map/brush.c')
-rwxr-xr-x | q3map/brush.c | 1680 |
1 files changed, 840 insertions, 840 deletions
diff --git a/q3map/brush.c b/q3map/brush.c index e373e17..506bd1d 100755 --- a/q3map/brush.c +++ b/q3map/brush.c @@ -19,843 +19,843 @@ 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"
-
-
-int c_active_brushes;
-
-int c_nodes;
-
-// if a brush just barely pokes onto the other side,
-// let it slide by without chopping
-#define PLANESIDE_EPSILON 0.001
-//0.1
-
-
-
-
-/*
-================
-CountBrushList
-================
-*/
-int CountBrushList (bspbrush_t *brushes)
-{
- int c;
-
- c = 0;
- for ( ; brushes ; brushes = brushes->next)
- c++;
- return c;
-}
-
-
-/*
-================
-AllocBrush
-================
-*/
-bspbrush_t *AllocBrush (int numsides)
-{
- bspbrush_t *bb;
- int c;
-
- c = (int)&(((bspbrush_t *)0)->sides[numsides]);
- bb = malloc(c);
- memset (bb, 0, c);
- if (numthreads == 1)
- c_active_brushes++;
- return bb;
-}
-
-/*
-================
-FreeBrush
-================
-*/
-void FreeBrush (bspbrush_t *brushes)
-{
- int i;
-
- for (i=0 ; i<brushes->numsides ; i++)
- if (brushes->sides[i].winding)
- FreeWinding(brushes->sides[i].winding);
- free (brushes);
- if (numthreads == 1)
- c_active_brushes--;
-}
-
-
-/*
-================
-FreeBrushList
-================
-*/
-void FreeBrushList (bspbrush_t *brushes)
-{
- bspbrush_t *next;
-
- for ( ; brushes ; brushes = next)
- {
- next = brushes->next;
-
- FreeBrush (brushes);
- }
-}
-
-/*
-==================
-CopyBrush
-
-Duplicates the brush, the sides, and the windings
-==================
-*/
-bspbrush_t *CopyBrush (bspbrush_t *brush)
-{
- bspbrush_t *newbrush;
- int size;
- int i;
-
- size = (int)&(((bspbrush_t *)0)->sides[brush->numsides]);
-
- newbrush = AllocBrush (brush->numsides);
- memcpy (newbrush, brush, size);
-
- for (i=0 ; i<brush->numsides ; i++)
- {
- if (brush->sides[i].winding)
- newbrush->sides[i].winding = CopyWinding (brush->sides[i].winding);
- }
-
- return newbrush;
-}
-
-
-/*
-================
-DrawBrushList
-================
-*/
-void DrawBrushList (bspbrush_t *brush)
-{
- int i;
- side_t *s;
-
- GLS_BeginScene ();
- for ( ; brush ; brush=brush->next)
- {
- for (i=0 ; i<brush->numsides ; i++)
- {
- s = &brush->sides[i];
- if (!s->winding)
- continue;
- GLS_Winding (s->winding, 0);
- }
- }
- GLS_EndScene ();
-}
-
-
-
-/*
-================
-WriteBrushList
-================
-*/
-void WriteBrushList (char *name, bspbrush_t *brush, qboolean onlyvis)
-{
- int i;
- side_t *s;
- FILE *f;
-
- qprintf ("writing %s\n", name);
- f = SafeOpenWrite (name);
-
- for ( ; brush ; brush=brush->next)
- {
- for (i=0 ; i<brush->numsides ; i++)
- {
- s = &brush->sides[i];
- if (!s->winding)
- continue;
- if (onlyvis && !s->visible)
- continue;
- OutputWinding (brush->sides[i].winding, f);
- }
- }
-
- fclose (f);
-}
-
-
-/*
-=============
-PrintBrush
-=============
-*/
-void PrintBrush (bspbrush_t *brush)
-{
- int i;
-
- _printf ("brush: %p\n", brush);
- for (i=0;i<brush->numsides ; i++)
- {
- pw(brush->sides[i].winding);
- _printf ("\n");
- }
-}
-
-/*
-==================
-BoundBrush
-
-Sets the mins/maxs based on the windings
-returns false if the brush doesn't enclose a valid volume
-==================
-*/
-qboolean BoundBrush (bspbrush_t *brush)
-{
- int i, j;
- winding_t *w;
-
- ClearBounds (brush->mins, brush->maxs);
- for (i=0 ; i<brush->numsides ; i++)
- {
- w = brush->sides[i].winding;
- if (!w)
- continue;
- for (j=0 ; j<w->numpoints ; j++)
- AddPointToBounds (w->p[j], brush->mins, brush->maxs);
- }
-
- for (i=0 ; i<3 ; i++) {
- if (brush->mins[i] < MIN_WORLD_COORD || brush->maxs[i] > MAX_WORLD_COORD
- || brush->mins[i] >= brush->maxs[i] ) {
- return qfalse;
- }
- }
-
- return qtrue;
-}
-
-/*
-==================
-CreateBrushWindings
-
-makes basewindigs for sides and mins / maxs for the brush
-returns false if the brush doesn't enclose a valid volume
-==================
-*/
-qboolean CreateBrushWindings (bspbrush_t *brush)
-{
- int i, j;
- winding_t *w;
- side_t *side;
- plane_t *plane;
-
- for ( i = 0; i < brush->numsides; i++ )
- {
- side = &brush->sides[i];
- // don't create a winding for a bevel
- if ( side->bevel ) {
- continue;
- }
- plane = &mapplanes[side->planenum];
- w = BaseWindingForPlane (plane->normal, plane->dist);
- for ( j = 0; j < brush->numsides && w; j++ )
- {
- if (i == j)
- continue;
- if ( brush->sides[j].planenum == ( brush->sides[i].planenum ^ 1 ) )
- continue; // back side clipaway
- if (brush->sides[j].bevel)
- continue;
- if (brush->sides[j].backSide)
- continue;
- plane = &mapplanes[brush->sides[j].planenum^1];
- ChopWindingInPlace (&w, plane->normal, plane->dist, 0); //CLIP_EPSILON);
- }
- // free any existing winding
- if ( side->winding ) {
- FreeWinding( side->winding );
- }
- side->winding = w;
- }
-
- return BoundBrush (brush);
-}
-
-/*
-==================
-BrushFromBounds
-
-Creates a new axial brush
-==================
-*/
-bspbrush_t *BrushFromBounds (vec3_t mins, vec3_t maxs)
-{
- bspbrush_t *b;
- int i;
- vec3_t normal;
- vec_t dist;
-
- b = AllocBrush (6);
- b->numsides = 6;
- for (i=0 ; i<3 ; i++)
- {
- VectorClear (normal);
- normal[i] = 1;
- dist = maxs[i];
- b->sides[i].planenum = FindFloatPlane (normal, dist);
-
- normal[i] = -1;
- dist = -mins[i];
- b->sides[3+i].planenum = FindFloatPlane (normal, dist);
- }
-
- CreateBrushWindings (b);
-
- return b;
-}
-
-/*
-==================
-BrushVolume
-
-==================
-*/
-vec_t BrushVolume (bspbrush_t *brush)
-{
- int i;
- winding_t *w;
- vec3_t corner;
- vec_t d, area, volume;
- plane_t *plane;
-
- if (!brush)
- return 0;
-
- // grab the first valid point as the corner
-
- w = NULL;
- for (i=0 ; i<brush->numsides ; i++)
- {
- w = brush->sides[i].winding;
- if (w)
- break;
- }
- if (!w)
- return 0;
- VectorCopy (w->p[0], corner);
-
- // make tetrahedrons to all other faces
-
- volume = 0;
- for ( ; i<brush->numsides ; i++)
- {
- w = brush->sides[i].winding;
- if (!w)
- continue;
- plane = &mapplanes[brush->sides[i].planenum];
- d = -(DotProduct (corner, plane->normal) - plane->dist);
- area = WindingArea (w);
- volume += d*area;
- }
-
- volume /= 3;
- return volume;
-}
-
-
-/*
-==================
-WriteBspBrushMap
-==================
-*/
-void WriteBspBrushMap (char *name, bspbrush_t *list)
-{
- FILE *f;
- side_t *s;
- int i;
- winding_t *w;
-
- _printf ("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 ; i<list->numsides ; 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, "notexture 0 0 0 1 1\n" );
- FreeWinding (w);
- }
- fprintf (f, "}\n");
- }
- fprintf (f, "}\n");
-
- fclose (f);
-
-}
-
-
-//=====================================================================================
-
-/*
-====================
-FilterBrushIntoTree_r
-
-====================
-*/
-int FilterBrushIntoTree_r( bspbrush_t *b, node_t *node ) {
- bspbrush_t *front, *back;
- int c;
-
- if ( !b ) {
- return 0;
- }
-
- // add it to the leaf list
- if ( node->planenum == PLANENUM_LEAF ) {
- b->next = node->brushlist;
- node->brushlist = b;
-
- // classify the leaf by the structural brush
- if ( !b->detail ) {
- if ( b->opaque ) {
- node->opaque = qtrue;
- node->areaportal = qfalse;
- } else if ( b->contents & CONTENTS_AREAPORTAL ) {
- if ( !node->opaque ) {
- node->areaportal = qtrue;
- }
- }
- }
-
- return 1;
- }
-
- // split it by the node plane
- SplitBrush ( b, node->planenum, &front, &back );
- FreeBrush( b );
-
- c = 0;
- c += FilterBrushIntoTree_r( front, node->children[0] );
- c += FilterBrushIntoTree_r( back, node->children[1] );
-
- return c;
-}
-
-/*
-=====================
-FilterDetailBrushesIntoTree
-
-Fragment all the detail brushes into the structural leafs
-=====================
-*/
-void FilterDetailBrushesIntoTree( entity_t *e, tree_t *tree ) {
- bspbrush_t *b, *newb;
- int r;
- int c_unique, c_clusters;
- int i;
-
- qprintf( "----- FilterDetailBrushesIntoTree -----\n");
-
- c_unique = 0;
- c_clusters = 0;
- for ( b = e->brushes ; b ; b = b->next ) {
- if ( !b->detail ) {
- continue;
- }
- c_unique++;
- newb = CopyBrush( b );
- r = FilterBrushIntoTree_r( newb, tree->headnode );
- c_clusters += r;
-
- // mark all sides as visible so drawsurfs are created
- if ( r ) {
- for ( i = 0 ; i < b->numsides ; i++ ) {
- if ( b->sides[i].winding ) {
- b->sides[i].visible = qtrue;
- }
- }
- }
- }
-
- qprintf( "%5i detail brushes\n", c_unique );
- qprintf( "%5i cluster references\n", c_clusters );
-}
-
-/*
-=====================
-FilterStructuralBrushesIntoTree
-
-Mark the leafs as opaque and areaportals
-=====================
-*/
-void FilterStructuralBrushesIntoTree( entity_t *e, tree_t *tree ) {
- bspbrush_t *b, *newb;
- int r;
- int c_unique, c_clusters;
- int i;
-
- qprintf( "----- FilterStructuralBrushesIntoTree -----\n");
-
- c_unique = 0;
- c_clusters = 0;
- for ( b = e->brushes ; b ; b = b->next ) {
- if ( b->detail ) {
- continue;
- }
- c_unique++;
- newb = CopyBrush( b );
- r = FilterBrushIntoTree_r( newb, tree->headnode );
- c_clusters += r;
-
- // mark all sides as visible so drawsurfs are created
- if ( r ) {
- for ( i = 0 ; i < b->numsides ; i++ ) {
- if ( b->sides[i].winding ) {
- b->sides[i].visible = qtrue;
- }
- }
- }
- }
-
- qprintf( "%5i structural brushes\n", c_unique );
- qprintf( "%5i cluster references\n", c_clusters );
-}
-
-
-
-/*
-================
-AllocTree
-================
-*/
-tree_t *AllocTree (void)
-{
- tree_t *tree;
-
- tree = malloc(sizeof(*tree));
- memset (tree, 0, sizeof(*tree));
- ClearBounds (tree->mins, tree->maxs);
-
- return tree;
-}
-
-/*
-================
-AllocNode
-================
-*/
-node_t *AllocNode (void)
-{
- node_t *node;
-
- node = malloc(sizeof(*node));
- memset (node, 0, sizeof(*node));
-
- return node;
-}
-
-
-/*
-================
-WindingIsTiny
-
-Returns true if the winding would be crunched out of
-existance by the vertex snapping.
-================
-*/
-#define EDGE_LENGTH 0.2
-qboolean WindingIsTiny (winding_t *w)
-{
-/*
- if (WindingArea (w) < 1)
- return qtrue;
- return qfalse;
-*/
- int i, j;
- vec_t len;
- vec3_t delta;
- int edges;
-
- edges = 0;
- for (i=0 ; i<w->numpoints ; i++)
- {
- j = i == w->numpoints - 1 ? 0 : i+1;
- VectorSubtract (w->p[j], w->p[i], delta);
- len = VectorLength (delta);
- if (len > EDGE_LENGTH)
- {
- if (++edges == 3)
- return qfalse;
- }
- }
- return qtrue;
-}
-
-/*
-================
-WindingIsHuge
-
-Returns true if the winding still has one of the points
-from basewinding for plane
-================
-*/
-qboolean WindingIsHuge (winding_t *w)
-{
- int i, j;
-
- for (i=0 ; i<w->numpoints ; i++)
- {
- for (j=0 ; j<3 ; j++)
- if (w->p[i][j] <= MIN_WORLD_COORD || w->p[i][j] >= MAX_WORLD_COORD)
- return qtrue;
- }
- return qfalse;
-}
-
-//============================================================
-
-/*
-==================
-BrushMostlyOnSide
-
-==================
-*/
-int BrushMostlyOnSide (bspbrush_t *brush, plane_t *plane)
-{
- int i, j;
- winding_t *w;
- vec_t d, max;
- int side;
-
- max = 0;
- side = PSIDE_FRONT;
- for (i=0 ; i<brush->numsides ; i++)
- {
- w = brush->sides[i].winding;
- if (!w)
- continue;
- for (j=0 ; j<w->numpoints ; j++)
- {
- d = DotProduct (w->p[j], plane->normal) - plane->dist;
- if (d > max)
- {
- max = d;
- side = PSIDE_FRONT;
- }
- if (-d > max)
- {
- max = -d;
- side = PSIDE_BACK;
- }
- }
- }
- return side;
-}
-
-/*
-================
-SplitBrush
-
-Generates two new brushes, leaving the original
-unchanged
-================
-*/
-void SplitBrush (bspbrush_t *brush, int planenum,
- bspbrush_t **front, bspbrush_t **back)
-{
- bspbrush_t *b[2];
- int i, j;
- winding_t *w, *cw[2], *midwinding;
- plane_t *plane, *plane2;
- side_t *s, *cs;
- float d, d_front, d_back;
-
- *front = *back = NULL;
- plane = &mapplanes[planenum];
-
- // check all points
- d_front = d_back = 0;
- for (i=0 ; i<brush->numsides ; i++)
- {
- w = brush->sides[i].winding;
- if (!w)
- continue;
- for (j=0 ; j<w->numpoints ; j++)
- {
- d = DotProduct (w->p[j], plane->normal) - plane->dist;
- if (d > 0 && d > d_front)
- d_front = d;
- if (d < 0 && d < d_back)
- d_back = d;
- }
- }
- if (d_front < 0.1) // PLANESIDE_EPSILON)
- { // only on back
- *back = CopyBrush (brush);
- return;
- }
- if (d_back > -0.1) // PLANESIDE_EPSILON)
- { // only on front
- *front = CopyBrush (brush);
- return;
- }
-
- // create a new winding from the split plane
-
- w = BaseWindingForPlane (plane->normal, plane->dist);
- for (i=0 ; i<brush->numsides && w ; i++)
- {
- if ( brush->sides[i].backSide ) {
- continue; // fake back-sided polygons never split
- }
- plane2 = &mapplanes[brush->sides[i].planenum ^ 1];
- ChopWindingInPlace (&w, plane2->normal, plane2->dist, 0); // PLANESIDE_EPSILON);
- }
-
- if (!w || WindingIsTiny (w) )
- { // the brush isn't really split
- int side;
-
- side = BrushMostlyOnSide (brush, plane);
- if (side == PSIDE_FRONT)
- *front = CopyBrush (brush);
- if (side == PSIDE_BACK)
- *back = CopyBrush (brush);
- return;
- }
-
- if (WindingIsHuge (w))
- {
- qprintf ("WARNING: huge winding\n");
- }
-
- midwinding = w;
-
- // split it for real
-
- for (i=0 ; i<2 ; i++)
- {
- b[i] = AllocBrush (brush->numsides+1);
- memcpy( b[i], brush, sizeof( bspbrush_t ) - sizeof( brush->sides ) );
- b[i]->numsides = 0;
- b[i]->next = NULL;
- b[i]->original = brush->original;
- }
-
- // split all the current windings
-
- for (i=0 ; i<brush->numsides ; i++)
- {
- s = &brush->sides[i];
- w = s->winding;
- if (!w)
- continue;
- ClipWindingEpsilon (w, plane->normal, plane->dist,
- 0 /*PLANESIDE_EPSILON*/, &cw[0], &cw[1]);
- for (j=0 ; j<2 ; j++)
- {
- if (!cw[j])
- continue;
-/*
- if (WindingIsTiny (cw[j]))
- {
- FreeWinding (cw[j]);
- continue;
- }
-*/
- cs = &b[j]->sides[b[j]->numsides];
- b[j]->numsides++;
- *cs = *s;
- cs->winding = cw[j];
- }
- }
-
-
- // see if we have valid polygons on both sides
-
- for (i=0 ; i<2 ; i++)
- {
- BoundBrush (b[i]);
- for (j=0 ; j<3 ; j++)
- {
- if (b[i]->mins[j] < MIN_WORLD_COORD || b[i]->maxs[j] > MAX_WORLD_COORD)
- {
- qprintf ("bogus brush after clip\n");
- break;
- }
- }
-
- if (b[i]->numsides < 3 || j < 3)
- {
- FreeBrush (b[i]);
- b[i] = NULL;
- }
- }
-
- if ( !(b[0] && b[1]) )
- {
- if (!b[0] && !b[1])
- qprintf ("split removed brush\n");
- else
- qprintf ("split not on both sides\n");
- if (b[0])
- {
- FreeBrush (b[0]);
- *front = CopyBrush (brush);
- }
- if (b[1])
- {
- FreeBrush (b[1]);
- *back = CopyBrush (brush);
- }
- return;
- }
-
- // add the midwinding to both sides
- for (i=0 ; i<2 ; i++)
- {
- cs = &b[i]->sides[b[i]->numsides];
- b[i]->numsides++;
-
- cs->planenum = planenum^i^1;
- cs->shaderInfo = NULL;
- if (i==0)
- cs->winding = CopyWinding (midwinding);
- else
- cs->winding = midwinding;
- }
-
-{
- vec_t v1;
- int i;
-
- for (i=0 ; i<2 ; i++)
- {
- v1 = BrushVolume (b[i]);
- if (v1 < 1.0)
- {
- FreeBrush (b[i]);
- b[i] = NULL;
-// qprintf ("tiny volume after clip\n");
- }
- }
-}
-
- *front = b[0];
- *back = b[1];
-}
+#include "qbsp.h" + + +int c_active_brushes; + +int c_nodes; + +// if a brush just barely pokes onto the other side, +// let it slide by without chopping +#define PLANESIDE_EPSILON 0.001 +//0.1 + + + + +/* +================ +CountBrushList +================ +*/ +int CountBrushList (bspbrush_t *brushes) +{ + int c; + + c = 0; + for ( ; brushes ; brushes = brushes->next) + c++; + return c; +} + + +/* +================ +AllocBrush +================ +*/ +bspbrush_t *AllocBrush (int numsides) +{ + bspbrush_t *bb; + int c; + + c = (int)&(((bspbrush_t *)0)->sides[numsides]); + bb = malloc(c); + memset (bb, 0, c); + if (numthreads == 1) + c_active_brushes++; + return bb; +} + +/* +================ +FreeBrush +================ +*/ +void FreeBrush (bspbrush_t *brushes) +{ + int i; + + for (i=0 ; i<brushes->numsides ; i++) + if (brushes->sides[i].winding) + FreeWinding(brushes->sides[i].winding); + free (brushes); + if (numthreads == 1) + c_active_brushes--; +} + + +/* +================ +FreeBrushList +================ +*/ +void FreeBrushList (bspbrush_t *brushes) +{ + bspbrush_t *next; + + for ( ; brushes ; brushes = next) + { + next = brushes->next; + + FreeBrush (brushes); + } +} + +/* +================== +CopyBrush + +Duplicates the brush, the sides, and the windings +================== +*/ +bspbrush_t *CopyBrush (bspbrush_t *brush) +{ + bspbrush_t *newbrush; + int size; + int i; + + size = (int)&(((bspbrush_t *)0)->sides[brush->numsides]); + + newbrush = AllocBrush (brush->numsides); + memcpy (newbrush, brush, size); + + for (i=0 ; i<brush->numsides ; i++) + { + if (brush->sides[i].winding) + newbrush->sides[i].winding = CopyWinding (brush->sides[i].winding); + } + + return newbrush; +} + + +/* +================ +DrawBrushList +================ +*/ +void DrawBrushList (bspbrush_t *brush) +{ + int i; + side_t *s; + + GLS_BeginScene (); + for ( ; brush ; brush=brush->next) + { + for (i=0 ; i<brush->numsides ; i++) + { + s = &brush->sides[i]; + if (!s->winding) + continue; + GLS_Winding (s->winding, 0); + } + } + GLS_EndScene (); +} + + + +/* +================ +WriteBrushList +================ +*/ +void WriteBrushList (char *name, bspbrush_t *brush, qboolean onlyvis) +{ + int i; + side_t *s; + FILE *f; + + qprintf ("writing %s\n", name); + f = SafeOpenWrite (name); + + for ( ; brush ; brush=brush->next) + { + for (i=0 ; i<brush->numsides ; i++) + { + s = &brush->sides[i]; + if (!s->winding) + continue; + if (onlyvis && !s->visible) + continue; + OutputWinding (brush->sides[i].winding, f); + } + } + + fclose (f); +} + + +/* +============= +PrintBrush +============= +*/ +void PrintBrush (bspbrush_t *brush) +{ + int i; + + _printf ("brush: %p\n", brush); + for (i=0;i<brush->numsides ; i++) + { + pw(brush->sides[i].winding); + _printf ("\n"); + } +} + +/* +================== +BoundBrush + +Sets the mins/maxs based on the windings +returns false if the brush doesn't enclose a valid volume +================== +*/ +qboolean BoundBrush (bspbrush_t *brush) +{ + int i, j; + winding_t *w; + + ClearBounds (brush->mins, brush->maxs); + for (i=0 ; i<brush->numsides ; i++) + { + w = brush->sides[i].winding; + if (!w) + continue; + for (j=0 ; j<w->numpoints ; j++) + AddPointToBounds (w->p[j], brush->mins, brush->maxs); + } + + for (i=0 ; i<3 ; i++) { + if (brush->mins[i] < MIN_WORLD_COORD || brush->maxs[i] > MAX_WORLD_COORD + || brush->mins[i] >= brush->maxs[i] ) { + return qfalse; + } + } + + return qtrue; +} + +/* +================== +CreateBrushWindings + +makes basewindigs for sides and mins / maxs for the brush +returns false if the brush doesn't enclose a valid volume +================== +*/ +qboolean CreateBrushWindings (bspbrush_t *brush) +{ + int i, j; + winding_t *w; + side_t *side; + plane_t *plane; + + for ( i = 0; i < brush->numsides; i++ ) + { + side = &brush->sides[i]; + // don't create a winding for a bevel + if ( side->bevel ) { + continue; + } + plane = &mapplanes[side->planenum]; + w = BaseWindingForPlane (plane->normal, plane->dist); + for ( j = 0; j < brush->numsides && w; j++ ) + { + if (i == j) + continue; + if ( brush->sides[j].planenum == ( brush->sides[i].planenum ^ 1 ) ) + continue; // back side clipaway + if (brush->sides[j].bevel) + continue; + if (brush->sides[j].backSide) + continue; + plane = &mapplanes[brush->sides[j].planenum^1]; + ChopWindingInPlace (&w, plane->normal, plane->dist, 0); //CLIP_EPSILON); + } + // free any existing winding + if ( side->winding ) { + FreeWinding( side->winding ); + } + side->winding = w; + } + + return BoundBrush (brush); +} + +/* +================== +BrushFromBounds + +Creates a new axial brush +================== +*/ +bspbrush_t *BrushFromBounds (vec3_t mins, vec3_t maxs) +{ + bspbrush_t *b; + int i; + vec3_t normal; + vec_t dist; + + b = AllocBrush (6); + b->numsides = 6; + for (i=0 ; i<3 ; i++) + { + VectorClear (normal); + normal[i] = 1; + dist = maxs[i]; + b->sides[i].planenum = FindFloatPlane (normal, dist); + + normal[i] = -1; + dist = -mins[i]; + b->sides[3+i].planenum = FindFloatPlane (normal, dist); + } + + CreateBrushWindings (b); + + return b; +} + +/* +================== +BrushVolume + +================== +*/ +vec_t BrushVolume (bspbrush_t *brush) +{ + int i; + winding_t *w; + vec3_t corner; + vec_t d, area, volume; + plane_t *plane; + + if (!brush) + return 0; + + // grab the first valid point as the corner + + w = NULL; + for (i=0 ; i<brush->numsides ; i++) + { + w = brush->sides[i].winding; + if (w) + break; + } + if (!w) + return 0; + VectorCopy (w->p[0], corner); + + // make tetrahedrons to all other faces + + volume = 0; + for ( ; i<brush->numsides ; i++) + { + w = brush->sides[i].winding; + if (!w) + continue; + plane = &mapplanes[brush->sides[i].planenum]; + d = -(DotProduct (corner, plane->normal) - plane->dist); + area = WindingArea (w); + volume += d*area; + } + + volume /= 3; + return volume; +} + + +/* +================== +WriteBspBrushMap +================== +*/ +void WriteBspBrushMap (char *name, bspbrush_t *list) +{ + FILE *f; + side_t *s; + int i; + winding_t *w; + + _printf ("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 ; i<list->numsides ; 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, "notexture 0 0 0 1 1\n" ); + FreeWinding (w); + } + fprintf (f, "}\n"); + } + fprintf (f, "}\n"); + + fclose (f); + +} + + +//===================================================================================== + +/* +==================== +FilterBrushIntoTree_r + +==================== +*/ +int FilterBrushIntoTree_r( bspbrush_t *b, node_t *node ) { + bspbrush_t *front, *back; + int c; + + if ( !b ) { + return 0; + } + + // add it to the leaf list + if ( node->planenum == PLANENUM_LEAF ) { + b->next = node->brushlist; + node->brushlist = b; + + // classify the leaf by the structural brush + if ( !b->detail ) { + if ( b->opaque ) { + node->opaque = qtrue; + node->areaportal = qfalse; + } else if ( b->contents & CONTENTS_AREAPORTAL ) { + if ( !node->opaque ) { + node->areaportal = qtrue; + } + } + } + + return 1; + } + + // split it by the node plane + SplitBrush ( b, node->planenum, &front, &back ); + FreeBrush( b ); + + c = 0; + c += FilterBrushIntoTree_r( front, node->children[0] ); + c += FilterBrushIntoTree_r( back, node->children[1] ); + + return c; +} + +/* +===================== +FilterDetailBrushesIntoTree + +Fragment all the detail brushes into the structural leafs +===================== +*/ +void FilterDetailBrushesIntoTree( entity_t *e, tree_t *tree ) { + bspbrush_t *b, *newb; + int r; + int c_unique, c_clusters; + int i; + + qprintf( "----- FilterDetailBrushesIntoTree -----\n"); + + c_unique = 0; + c_clusters = 0; + for ( b = e->brushes ; b ; b = b->next ) { + if ( !b->detail ) { + continue; + } + c_unique++; + newb = CopyBrush( b ); + r = FilterBrushIntoTree_r( newb, tree->headnode ); + c_clusters += r; + + // mark all sides as visible so drawsurfs are created + if ( r ) { + for ( i = 0 ; i < b->numsides ; i++ ) { + if ( b->sides[i].winding ) { + b->sides[i].visible = qtrue; + } + } + } + } + + qprintf( "%5i detail brushes\n", c_unique ); + qprintf( "%5i cluster references\n", c_clusters ); +} + +/* +===================== +FilterStructuralBrushesIntoTree + +Mark the leafs as opaque and areaportals +===================== +*/ +void FilterStructuralBrushesIntoTree( entity_t *e, tree_t *tree ) { + bspbrush_t *b, *newb; + int r; + int c_unique, c_clusters; + int i; + + qprintf( "----- FilterStructuralBrushesIntoTree -----\n"); + + c_unique = 0; + c_clusters = 0; + for ( b = e->brushes ; b ; b = b->next ) { + if ( b->detail ) { + continue; + } + c_unique++; + newb = CopyBrush( b ); + r = FilterBrushIntoTree_r( newb, tree->headnode ); + c_clusters += r; + + // mark all sides as visible so drawsurfs are created + if ( r ) { + for ( i = 0 ; i < b->numsides ; i++ ) { + if ( b->sides[i].winding ) { + b->sides[i].visible = qtrue; + } + } + } + } + + qprintf( "%5i structural brushes\n", c_unique ); + qprintf( "%5i cluster references\n", c_clusters ); +} + + + +/* +================ +AllocTree +================ +*/ +tree_t *AllocTree (void) +{ + tree_t *tree; + + tree = malloc(sizeof(*tree)); + memset (tree, 0, sizeof(*tree)); + ClearBounds (tree->mins, tree->maxs); + + return tree; +} + +/* +================ +AllocNode +================ +*/ +node_t *AllocNode (void) +{ + node_t *node; + + node = malloc(sizeof(*node)); + memset (node, 0, sizeof(*node)); + + return node; +} + + +/* +================ +WindingIsTiny + +Returns true if the winding would be crunched out of +existance by the vertex snapping. +================ +*/ +#define EDGE_LENGTH 0.2 +qboolean WindingIsTiny (winding_t *w) +{ +/* + if (WindingArea (w) < 1) + return qtrue; + return qfalse; +*/ + int i, j; + vec_t len; + vec3_t delta; + int edges; + + edges = 0; + for (i=0 ; i<w->numpoints ; i++) + { + j = i == w->numpoints - 1 ? 0 : i+1; + VectorSubtract (w->p[j], w->p[i], delta); + len = VectorLength (delta); + if (len > EDGE_LENGTH) + { + if (++edges == 3) + return qfalse; + } + } + return qtrue; +} + +/* +================ +WindingIsHuge + +Returns true if the winding still has one of the points +from basewinding for plane +================ +*/ +qboolean WindingIsHuge (winding_t *w) +{ + int i, j; + + for (i=0 ; i<w->numpoints ; i++) + { + for (j=0 ; j<3 ; j++) + if (w->p[i][j] <= MIN_WORLD_COORD || w->p[i][j] >= MAX_WORLD_COORD) + return qtrue; + } + return qfalse; +} + +//============================================================ + +/* +================== +BrushMostlyOnSide + +================== +*/ +int BrushMostlyOnSide (bspbrush_t *brush, plane_t *plane) +{ + int i, j; + winding_t *w; + vec_t d, max; + int side; + + max = 0; + side = PSIDE_FRONT; + for (i=0 ; i<brush->numsides ; i++) + { + w = brush->sides[i].winding; + if (!w) + continue; + for (j=0 ; j<w->numpoints ; j++) + { + d = DotProduct (w->p[j], plane->normal) - plane->dist; + if (d > max) + { + max = d; + side = PSIDE_FRONT; + } + if (-d > max) + { + max = -d; + side = PSIDE_BACK; + } + } + } + return side; +} + +/* +================ +SplitBrush + +Generates two new brushes, leaving the original +unchanged +================ +*/ +void SplitBrush (bspbrush_t *brush, int planenum, + bspbrush_t **front, bspbrush_t **back) +{ + bspbrush_t *b[2]; + int i, j; + winding_t *w, *cw[2], *midwinding; + plane_t *plane, *plane2; + side_t *s, *cs; + float d, d_front, d_back; + + *front = *back = NULL; + plane = &mapplanes[planenum]; + + // check all points + d_front = d_back = 0; + for (i=0 ; i<brush->numsides ; i++) + { + w = brush->sides[i].winding; + if (!w) + continue; + for (j=0 ; j<w->numpoints ; j++) + { + d = DotProduct (w->p[j], plane->normal) - plane->dist; + if (d > 0 && d > d_front) + d_front = d; + if (d < 0 && d < d_back) + d_back = d; + } + } + if (d_front < 0.1) // PLANESIDE_EPSILON) + { // only on back + *back = CopyBrush (brush); + return; + } + if (d_back > -0.1) // PLANESIDE_EPSILON) + { // only on front + *front = CopyBrush (brush); + return; + } + + // create a new winding from the split plane + + w = BaseWindingForPlane (plane->normal, plane->dist); + for (i=0 ; i<brush->numsides && w ; i++) + { + if ( brush->sides[i].backSide ) { + continue; // fake back-sided polygons never split + } + plane2 = &mapplanes[brush->sides[i].planenum ^ 1]; + ChopWindingInPlace (&w, plane2->normal, plane2->dist, 0); // PLANESIDE_EPSILON); + } + + if (!w || WindingIsTiny (w) ) + { // the brush isn't really split + int side; + + side = BrushMostlyOnSide (brush, plane); + if (side == PSIDE_FRONT) + *front = CopyBrush (brush); + if (side == PSIDE_BACK) + *back = CopyBrush (brush); + return; + } + + if (WindingIsHuge (w)) + { + qprintf ("WARNING: huge winding\n"); + } + + midwinding = w; + + // split it for real + + for (i=0 ; i<2 ; i++) + { + b[i] = AllocBrush (brush->numsides+1); + memcpy( b[i], brush, sizeof( bspbrush_t ) - sizeof( brush->sides ) ); + b[i]->numsides = 0; + b[i]->next = NULL; + b[i]->original = brush->original; + } + + // split all the current windings + + for (i=0 ; i<brush->numsides ; i++) + { + s = &brush->sides[i]; + w = s->winding; + if (!w) + continue; + ClipWindingEpsilon (w, plane->normal, plane->dist, + 0 /*PLANESIDE_EPSILON*/, &cw[0], &cw[1]); + for (j=0 ; j<2 ; j++) + { + if (!cw[j]) + continue; +/* + if (WindingIsTiny (cw[j])) + { + FreeWinding (cw[j]); + continue; + } +*/ + cs = &b[j]->sides[b[j]->numsides]; + b[j]->numsides++; + *cs = *s; + cs->winding = cw[j]; + } + } + + + // see if we have valid polygons on both sides + + for (i=0 ; i<2 ; i++) + { + BoundBrush (b[i]); + for (j=0 ; j<3 ; j++) + { + if (b[i]->mins[j] < MIN_WORLD_COORD || b[i]->maxs[j] > MAX_WORLD_COORD) + { + qprintf ("bogus brush after clip\n"); + break; + } + } + + if (b[i]->numsides < 3 || j < 3) + { + FreeBrush (b[i]); + b[i] = NULL; + } + } + + if ( !(b[0] && b[1]) ) + { + if (!b[0] && !b[1]) + qprintf ("split removed brush\n"); + else + qprintf ("split not on both sides\n"); + if (b[0]) + { + FreeBrush (b[0]); + *front = CopyBrush (brush); + } + if (b[1]) + { + FreeBrush (b[1]); + *back = CopyBrush (brush); + } + return; + } + + // add the midwinding to both sides + for (i=0 ; i<2 ; i++) + { + cs = &b[i]->sides[b[i]->numsides]; + b[i]->numsides++; + + cs->planenum = planenum^i^1; + cs->shaderInfo = NULL; + if (i==0) + cs->winding = CopyWinding (midwinding); + else + cs->winding = midwinding; + } + +{ + vec_t v1; + int i; + + for (i=0 ; i<2 ; i++) + { + v1 = BrushVolume (b[i]); + if (v1 < 1.0) + { + FreeBrush (b[i]); + b[i] = NULL; +// qprintf ("tiny volume after clip\n"); + } + } +} + + *front = b[0]; + *back = b[1]; +} |