map_q2.c

quakeIII源码这个不用我多说吧

	int planenum;
	dbrushside_t *bspbrushside;
	dplane_t *bspplane;

	if (nummapbrushes >= MAX_MAPFILE_BRUSHES)
		Error ("nummapbrushes >= MAX_MAPFILE_BRUSHES");

	b = &mapbrushes[nummapbrushes];
	b->original_sides = &brushsides[nummapbrushsides];
	b->entitynum = mapent-entities;
	b->brushnum = nummapbrushes - mapent->firstbrush;
	b->leafnum = dbrushleafnums[bspbrush - dbrushes];

	for (n = 0; n < bspbrush->numsides; n++)
	{
		//pointer to the bsp brush side
		bspbrushside = &dbrushsides[bspbrush->firstside + n];

		if (nummapbrushsides >= MAX_MAPFILE_BRUSHSIDES)
		{
			Error ("MAX_MAPFILE_BRUSHSIDES");
		} //end if
		//pointer to the map brush side
		side = &brushsides[nummapbrushsides];
		//if the BSP brush side is textured
		if (brushsidetextured[bspbrush->firstside + n]) side->flags |= SFL_TEXTURED;
		else side->flags &= ~SFL_TEXTURED;
		//ME: can get side contents and surf directly from BSP file
		side->contents = bspbrush->contents;
		//if the texinfo is TEXINFO_NODE
		if (bspbrushside->texinfo < 0) side->surf = 0;
		else side->surf = texinfo[bspbrushside->texinfo].flags;

		// translucent objects are automatically classified as detail
		if (side->surf & (SURF_TRANS33|SURF_TRANS66) )
			side->contents |= CONTENTS_DETAIL;
		if (side->contents & (CONTENTS_PLAYERCLIP|CONTENTS_MONSTERCLIP) )
			side->contents |= CONTENTS_DETAIL;
		if (fulldetail)
			side->contents &= ~CONTENTS_DETAIL;
		if (!(side->contents & ((LAST_VISIBLE_CONTENTS-1) 
			| CONTENTS_PLAYERCLIP|CONTENTS_MONSTERCLIP|CONTENTS_MIST)  ) )
			side->contents |= CONTENTS_SOLID;

		// hints and skips are never detail, and have no content
		if (side->surf & (SURF_HINT|SURF_SKIP) )
		{
			side->contents = 0;
			side->surf &= ~CONTENTS_DETAIL;
		}

		//ME: get a plane for this side
		bspplane = &dplanes[bspbrushside->planenum];
		planenum = FindFloatPlane(bspplane->normal, bspplane->dist);
		//
		// see if the plane has been used already
		//
		//ME: this really shouldn't happen!!!
		//ME: otherwise the bsp file is corrupted??
		//ME: still it seems to happen, maybe Johny Boy's
		//ME: brush bevel adding is crappy ?
		for (k = 0; k < b->numsides; k++)
		{
			s2 = b->original_sides + k;
//			if (DotProduct (mapplanes[s2->planenum].normal, mapplanes[planenum].normal) > 0.999
//							&& fabs(mapplanes[s2->planenum].dist - mapplanes[planenum].dist) < 0.01 )

			if (s2->planenum == planenum)
			{
				Log_Print("Entity %i, Brush %i: duplicate plane\n"
					, b->entitynum, b->brushnum);
				break;
			}
			if ( s2->planenum == (planenum^1) )
			{
				Log_Print("Entity %i, Brush %i: mirrored plane\n"
					, b->entitynum, b->brushnum);
				break;
			}
		}
		if (k != b->numsides)
			continue;		// duplicated

		//
		// keep this side
		//
		//ME: reset pointer to side, why? hell I dunno (pointer is set above already)
		side = b->original_sides + b->numsides;
		//ME: store the plane number
		side->planenum = planenum;
		//ME: texinfo is already stored when bsp is loaded
		//NOTE: check for TEXINFO_NODE, otherwise crash in Q2_BrushContents
		if (bspbrushside->texinfo < 0) side->texinfo = 0;
		else side->texinfo = bspbrushside->texinfo;

		// save the td off in case there is an origin brush and we
		// have to recalculate the texinfo
		// ME: don't need to recalculate because it's already done
		//     (for non-world entities) in the BSP file
//		side_brushtextures[nummapbrushsides] = td;

		nummapbrushsides++;
		b->numsides++;
	} //end for

	// get the content for the entire brush
	b->contents = bspbrush->contents;
	Q2_BrushContents(b);

	if (BrushExists(b))
	{
		c_squattbrushes++;
		b->numsides = 0;
		return;
	} //end if

	//if we're creating AAS
	if (create_aas)
	{
		//create the AAS brushes from this brush, don't add brush bevels
		AAS_CreateMapBrushes(b, mapent, false);
		return;
	} //end if

	// allow detail brushes to be removed 
	if (nodetail && (b->contents & CONTENTS_DETAIL) )
	{
		b->numsides = 0;
		return;
	} //end if

	// allow water brushes to be removed
	if (nowater && (b->contents & (CONTENTS_LAVA | CONTENTS_SLIME | CONTENTS_WATER)) )
	{
		b->numsides = 0;
		return;
	} //end if

	// create windings for sides and bounds for brush
	MakeBrushWindings(b);

	//mark brushes without winding or with a tiny window as bevels
	MarkBrushBevels(b);

	// brushes that will not be visible at all will never be
	// used as bsp splitters
	if (b->contents & (CONTENTS_PLAYERCLIP|CONTENTS_MONSTERCLIP) )
	{
			c_clipbrushes++;
		for (i = 0; i < b->numsides; i++)
			b->original_sides[i].texinfo = TEXINFO_NODE;
	} //end for

	//
	// origin brushes are removed, but they set
	// the rotation origin for the rest of the brushes
	// in the entity.  After the entire entity is parsed,
	// the planenums and texinfos will be adjusted for
	// the origin brush
	//
	//ME: not needed because the entities in the BSP file already
	//    have an origin set
//	if (b->contents & CONTENTS_ORIGIN)
//	{
//		char	string[32];
//		vec3_t	origin;
//
//		if (num_entities == 1)
//		{
//			Error ("Entity %i, Brush %i: origin brushes not allowed in world"
//				, b->entitynum, b->brushnum);
//			return;
//		}
//
//		VectorAdd (b->mins, b->maxs, origin);
//		VectorScale (origin, 0.5, origin);
//
//		sprintf (string, "%i %i %i", (int)origin[0], (int)origin[1], (int)origin[2]);
//		SetKeyValue (&entities[b->entitynum], "origin", string);
//
//		VectorCopy (origin, entities[b->entitynum].origin);
//
//		// don't keep this brush
//		b->numsides = 0;
//
//		return;
//	}

	//ME: the bsp brushes already have bevels, so we won't try to
	//    add them again (especially since Johny Boy's bevel adding might
	//    be crappy)
//	AddBrushBevels(b);

	nummapbrushes++;
	mapent->numbrushes++;
} //end of the function Q2_BSPBrushToMapBrush
//===========================================================================
//===========================================================================
void Q2_ParseBSPBrushes(entity_t *mapent)
{
	int i;

	//give all the brushes that belong to this entity the number of the
	//BSP model used by this entity
	Q2_SetBrushModelNumbers(mapent);
	//now parse all the brushes with the correct mapent->modelnum
	for (i = 0; i < numbrushes; i++)
	{
		if (brushmodelnumbers[i] == mapent->modelnum)
		{
			Q2_BSPBrushToMapBrush(&dbrushes[i], mapent);
		} //end if
	} //end for
} //end of the function Q2_ParseBSPBrushes
//===========================================================================
//===========================================================================
qboolean Q2_ParseBSPEntity(int entnum)
{
	entity_t	*mapent;
	char *model;
	int startbrush, startsides;

	startbrush = nummapbrushes;
	startsides = nummapbrushsides;

	mapent = &entities[entnum];//num_entities];
	mapent->firstbrush = nummapbrushes;
	mapent->numbrushes = 0;
	mapent->modelnum = -1;	//-1 = no model

	model = ValueForKey(mapent, "model");
	if (model && strlen(model))
	{
		if (*model != '*')
		{
			Error("Q2_ParseBSPEntity: model number without leading *");
		} //end if
		//get the model number of this entity (skip the leading *)
		mapent->modelnum = atoi(&model[1]);
	} //end if

	GetVectorForKey(mapent, "origin", mapent->origin);

	//if this is the world entity it has model number zero
	//the world entity has no model key
	if (!strcmp("worldspawn", ValueForKey(mapent, "classname")))
	{
		mapent->modelnum = 0;
	} //end if
	//if the map entity has a BSP model (a modelnum of -1 is used for
	//entities that aren't using a BSP model)
	if (mapent->modelnum >= 0)
	{
		//parse the bsp brushes
		Q2_ParseBSPBrushes(mapent);
	} //end if
	//
	//the origin of the entity is already taken into account
	//
	//func_group entities can't be in the bsp file
	//
	//check out the func_areaportal entities
	if (!strcmp ("func_areaportal", ValueForKey (mapent, "classname")))
	{
		c_areaportals++;
		mapent->areaportalnum = c_areaportals;
		return true;
	} //end if
	return true;
} //end of the function Q2_ParseBSPEntity
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void Q2_LoadMapFromBSP(char *filename, int offset, int length)
{
	int i;

	Log_Print("-- Q2_LoadMapFromBSP --\n");
	//loaded map type
	loadedmaptype = MAPTYPE_QUAKE2;

	Log_Print("Loading map from %s...\n", filename);
	//load the bsp file
	Q2_LoadBSPFile(filename, offset, length);

	//create an index from bsp planes to map planes
	//DPlanes2MapPlanes();
	//clear brush model numbers
	for (i = 0; i < MAX_MAPFILE_BRUSHES; i++)
		brushmodelnumbers[i] = -1;

	nummapbrushsides = 0;
	num_entities = 0;

	Q2_ParseEntities();
	//
	for (i = 0; i < num_entities; i++)
	{
		Q2_ParseBSPEntity(i);
	} //end for

	//get the map mins and maxs from the world model
	ClearBounds(map_mins, map_maxs);
	for (i = 0; i < entities[0].numbrushes; i++)
	{
		if (mapbrushes[i].mins[0] > 4096)
			continue;	//no valid points
		AddPointToBounds (mapbrushes[i].mins, map_mins, map_maxs);
		AddPointToBounds (mapbrushes[i].maxs, map_mins, map_maxs);
	} //end for

	PrintMapInfo();
	//
	Q2_CreateMapTexinfo();
} //end of the function Q2_LoadMapFromBSP

void Q2_ResetMapLoading(void)
{
	//reset for map loading from bsp
	memset(nodestack, 0, NODESTACKSIZE * sizeof(int));
	nodestackptr = NULL;
	nodestacksize = 0;
	memset(brushmodelnumbers, 0, MAX_MAPFILE_BRUSHES * sizeof(int));
} //end of the function Q2_ResetMapLoading

//End MAP loading from BSP file
#endif //ME

//====================================================================

/*
================
TestExpandBrushes

Expands all the brush planes and saves a new map out
================
*/
void TestExpandBrushes (void)
{
	FILE	*f;
	side_t	*s;
	int		i, j, bn;
	winding_t	*w;
	char	*name = "expanded.map";
	mapbrush_t	*brush;
	vec_t	dist;

	Log_Print("writing %s\n", name);
	f = fopen (name, "wb");
	if (!f)
		Error ("Can't write %s\n", name);

	fprintf (f, "{\n\"classname\" \"worldspawn\"\n");

	for (bn=0 ; bn<nummapbrushes ; bn++)
	{
		brush = &mapbrushes[bn];
		fprintf (f, "{\n");
		for (i=0 ; i<brush->numsides ; i++)
		{
			s = brush->original_sides + i;
			dist = mapplanes[s->planenum].dist;
			for (j=0 ; j<3 ; j++)
				dist += fabs( 16 * mapplanes[s->planenum].normal[j] );

			w = BaseWindingForPlane (mapplanes[s->planenum].normal, 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);

	Error ("can't proceed after expanding brushes");
} //end of the function TestExpandBrushes