/*
===========================================================================

Doom 3 BFG Edition GPL Source Code
Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company.

This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").

Doom 3 BFG Edition 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 3 of the License, or
(at your option) any later version.

Doom 3 BFG Edition 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 Doom 3 BFG Edition Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#include "precompiled.h"
#pragma hdrstop


/*
===============
FloatCRC
===============
*/
ID_INLINE unsigned int FloatCRC( float f )
{
	return *( unsigned int* )&f;
}

/*
===============
StringCRC
===============
*/
ID_INLINE unsigned int StringCRC( const char* str )
{
	unsigned int i, crc;
	const unsigned char* ptr;
	
	crc = 0;
	ptr = reinterpret_cast<const unsigned char*>( str );
	for( i = 0; str[i]; i++ )
	{
		crc ^= str[i] << ( i & 3 );
	}
	return crc;
}

/*
=================
ComputeAxisBase

WARNING : special case behaviour of atan2(y,x) <-> atan(y/x) might not be the same everywhere when x == 0
rotation by (0,RotY,RotZ) assigns X to normal
=================
*/
static void ComputeAxisBase( const idVec3& normal, idVec3& texS, idVec3& texT )
{
	float RotY, RotZ;
	idVec3 n;
	
	// do some cleaning
	n[0] = ( idMath::Fabs( normal[0] ) < 1e-6f ) ? 0.0f : normal[0];
	n[1] = ( idMath::Fabs( normal[1] ) < 1e-6f ) ? 0.0f : normal[1];
	n[2] = ( idMath::Fabs( normal[2] ) < 1e-6f ) ? 0.0f : normal[2];
	
	RotY = -atan2( n[2], idMath::Sqrt( n[1] * n[1] + n[0] * n[0] ) );
	RotZ = atan2( n[1], n[0] );
	// rotate (0,1,0) and (0,0,1) to compute texS and texT
	texS[0] = -sin( RotZ );
	texS[1] = cos( RotZ );
	texS[2] = 0;
	// the texT vector is along -Z ( T texture coorinates axis )
	texT[0] = -sin( RotY ) * cos( RotZ );
	texT[1] = -sin( RotY ) * sin( RotZ );
	texT[2] = -cos( RotY );
}

/*
=================
idMapBrushSide::GetTextureVectors
=================
*/
void idMapBrushSide::GetTextureVectors( idVec4 v[2] ) const
{
	int i;
	idVec3 texX, texY;
	
	ComputeAxisBase( plane.Normal(), texX, texY );
	for( i = 0; i < 2; i++ )
	{
		v[i][0] = texX[0] * texMat[i][0] + texY[0] * texMat[i][1];
		v[i][1] = texX[1] * texMat[i][0] + texY[1] * texMat[i][1];
		v[i][2] = texX[2] * texMat[i][0] + texY[2] * texMat[i][1];
		v[i][3] = texMat[i][2] + ( origin * v[i].ToVec3() );
	}
}

/*
=================
idMapPatch::Parse
=================
*/
idMapPatch* idMapPatch::Parse( idLexer& src, const idVec3& origin, bool patchDef3, float version )
{
	float		info[7];
	idDrawVert* vert;
	idToken		token;
	int			i, j;
	
	if( !src.ExpectTokenString( "{" ) )
	{
		return NULL;
	}
	
	// read the material (we had an implicit 'textures/' in the old format...)
	if( !src.ReadToken( &token ) )
	{
		src.Error( "idMapPatch::Parse: unexpected EOF" );
		return NULL;
	}
	
	// Parse it
	if( patchDef3 )
	{
		if( !src.Parse1DMatrix( 7, info ) )
		{
			src.Error( "idMapPatch::Parse: unable to Parse patchDef3 info" );
			return NULL;
		}
	}
	else
	{
		if( !src.Parse1DMatrix( 5, info ) )
		{
			src.Error( "idMapPatch::Parse: unable to parse patchDef2 info" );
			return NULL;
		}
	}
	
	idMapPatch* patch = new( TAG_IDLIB ) idMapPatch( info[0], info[1] );
	
	patch->SetSize( info[0], info[1] );
	if( version < 2.0f )
	{
		patch->SetMaterial( "textures/" + token );
	}
	else
	{
		patch->SetMaterial( token );
	}
	
	if( patchDef3 )
	{
		patch->SetHorzSubdivisions( info[2] );
		patch->SetVertSubdivisions( info[3] );
		patch->SetExplicitlySubdivided( true );
	}
	
	if( patch->GetWidth() < 0 || patch->GetHeight() < 0 )
	{
		src.Error( "idMapPatch::Parse: bad size" );
		delete patch;
		return NULL;
	}
	
	// these were written out in the wrong order, IMHO
	if( !src.ExpectTokenString( "(" ) )
	{
		src.Error( "idMapPatch::Parse: bad patch vertex data" );
		delete patch;
		return NULL;
	}
	
	
	for( j = 0; j < patch->GetWidth(); j++ )
	{
		if( !src.ExpectTokenString( "(" ) )
		{
			src.Error( "idMapPatch::Parse: bad vertex row data" );
			delete patch;
			return NULL;
		}
		for( i = 0; i < patch->GetHeight(); i++ )
		{
			float v[5];
			
			if( !src.Parse1DMatrix( 5, v ) )
			{
				src.Error( "idMapPatch::Parse: bad vertex column data" );
				delete patch;
				return NULL;
			}
			
			vert = &( ( *patch )[i * patch->GetWidth() + j] );
			vert->xyz[0] = v[0] - origin[0];
			vert->xyz[1] = v[1] - origin[1];
			vert->xyz[2] = v[2] - origin[2];
			vert->SetTexCoord( v[3], v[4] );
		}
		if( !src.ExpectTokenString( ")" ) )
		{
			delete patch;
			src.Error( "idMapPatch::Parse: unable to parse patch control points" );
			return NULL;
		}
	}
	
	if( !src.ExpectTokenString( ")" ) )
	{
		src.Error( "idMapPatch::Parse: unable to parse patch control points, no closure" );
		delete patch;
		return NULL;
	}
	
	// read any key/value pairs
	while( src.ReadToken( &token ) )
	{
		if( token == "}" )
		{
			src.ExpectTokenString( "}" );
			break;
		}
		if( token.type == TT_STRING )
		{
			idStr key = token;
			src.ExpectTokenType( TT_STRING, 0, &token );
			patch->epairs.Set( key, token );
		}
	}
	
	return patch;
}

/*
============
idMapPatch::Write
============
*/
bool idMapPatch::Write( idFile* fp, int primitiveNum, const idVec3& origin ) const
{
	int i, j;
	const idDrawVert* v;
	
	if( GetExplicitlySubdivided() )
	{
		fp->WriteFloatString( "// primitive %d\n{\n patchDef3\n {\n", primitiveNum );
		fp->WriteFloatString( "  \"%s\"\n  ( %d %d %d %d 0 0 0 )\n", GetMaterial(), GetWidth(), GetHeight(), GetHorzSubdivisions(), GetVertSubdivisions() );
	}
	else
	{
		fp->WriteFloatString( "// primitive %d\n{\n patchDef2\n {\n", primitiveNum );
		fp->WriteFloatString( "  \"%s\"\n  ( %d %d 0 0 0 )\n", GetMaterial(), GetWidth(), GetHeight() );
	}
	
	fp->WriteFloatString( "  (\n" );
	idVec2 st;
	for( i = 0; i < GetWidth(); i++ )
	{
		fp->WriteFloatString( "   ( " );
		for( j = 0; j < GetHeight(); j++ )
		{
			v = &verts[ j * GetWidth() + i ];
			st = v->GetTexCoord();
			fp->WriteFloatString( " ( %f %f %f %f %f )", v->xyz[0] + origin[0],
								  v->xyz[1] + origin[1], v->xyz[2] + origin[2], st[0], st[1] );
		}
		fp->WriteFloatString( " )\n" );
	}
	fp->WriteFloatString( "  )\n }\n}\n" );
	
	return true;
}

/*
===============
idMapPatch::GetGeometryCRC
===============
*/
unsigned int idMapPatch::GetGeometryCRC() const
{
	int i, j;
	unsigned int crc;
	
	crc = GetHorzSubdivisions() ^ GetVertSubdivisions();
	for( i = 0; i < GetWidth(); i++ )
	{
		for( j = 0; j < GetHeight(); j++ )
		{
			crc ^= FloatCRC( verts[j * GetWidth() + i].xyz.x );
			crc ^= FloatCRC( verts[j * GetWidth() + i].xyz.y );
			crc ^= FloatCRC( verts[j * GetWidth() + i].xyz.z );
		}
	}
	
	crc ^= StringCRC( GetMaterial() );
	
	return crc;
}

/*
=================
idMapBrush::Parse
=================
*/
idMapBrush* idMapBrush::Parse( idLexer& src, const idVec3& origin, bool newFormat, float version )
{
	int i;
	idVec3 planepts[3];
	idToken token;
	idList<idMapBrushSide*> sides;
	idMapBrushSide*	side;
	idDict epairs;
	
	if( !src.ExpectTokenString( "{" ) )
	{
		return NULL;
	}
	
	do
	{
		if( !src.ReadToken( &token ) )
		{
			src.Error( "idMapBrush::Parse: unexpected EOF" );
			sides.DeleteContents( true );
			return NULL;
		}
		if( token == "}" )
		{
			break;
		}
		
		// here we may have to jump over brush epairs ( only used in editor )
		do
		{
			// if token is a brace
			if( token == "(" )
			{
				break;
			}
			// the token should be a key string for a key/value pair
			if( token.type != TT_STRING )
			{
				src.Error( "idMapBrush::Parse: unexpected %s, expected ( or epair key string", token.c_str() );
				sides.DeleteContents( true );
				return NULL;
			}
			
			idStr key = token;
			
			if( !src.ReadTokenOnLine( &token ) || token.type != TT_STRING )
			{
				src.Error( "idMapBrush::Parse: expected epair value string not found" );
				sides.DeleteContents( true );
				return NULL;
			}
			
			epairs.Set( key, token );
			
			// try to read the next key
			if( !src.ReadToken( &token ) )
			{
				src.Error( "idMapBrush::Parse: unexpected EOF" );
				sides.DeleteContents( true );
				return NULL;
			}
		}
		while( 1 );
		
		src.UnreadToken( &token );
		
		side = new( TAG_IDLIB ) idMapBrushSide();
		sides.Append( side );
		
		if( newFormat )
		{
			if( !src.Parse1DMatrix( 4, side->plane.ToFloatPtr() ) )
			{
				src.Error( "idMapBrush::Parse: unable to read brush side plane definition" );
				sides.DeleteContents( true );
				return NULL;
			}
		}
		else
		{
			// read the three point plane definition
			if( !src.Parse1DMatrix( 3, planepts[0].ToFloatPtr() ) ||
					!src.Parse1DMatrix( 3, planepts[1].ToFloatPtr() ) ||
					!src.Parse1DMatrix( 3, planepts[2].ToFloatPtr() ) )
			{
				src.Error( "idMapBrush::Parse: unable to read brush side plane definition" );
				sides.DeleteContents( true );
				return NULL;
			}
			
			planepts[0] -= origin;
			planepts[1] -= origin;
			planepts[2] -= origin;
			
			side->plane.FromPoints( planepts[0], planepts[1], planepts[2] );
		}
		
		// read the texture matrix
		// this is odd, because the texmat is 2D relative to default planar texture axis
		if( !src.Parse2DMatrix( 2, 3, side->texMat[0].ToFloatPtr() ) )
		{
			src.Error( "idMapBrush::Parse: unable to read brush side texture matrix" );
			sides.DeleteContents( true );
			return NULL;
		}
		side->origin = origin;
		
		// read the material
		if( !src.ReadTokenOnLine( &token ) )
		{
			src.Error( "idMapBrush::Parse: unable to read brush side material" );
			sides.DeleteContents( true );
			return NULL;
		}
		
		// we had an implicit 'textures/' in the old format...
		if( version < 2.0f )
		{
			side->material = "textures/" + token;
		}
		else
		{
			side->material = token;
		}
		
		// Q2 allowed override of default flags and values, but we don't any more
		if( src.ReadTokenOnLine( &token ) )
		{
			if( src.ReadTokenOnLine( &token ) )
			{
				if( src.ReadTokenOnLine( &token ) )
				{
				}
			}
		}
	}
	while( 1 );
	
	if( !src.ExpectTokenString( "}" ) )
	{
		sides.DeleteContents( true );
		return NULL;
	}
	
	idMapBrush* brush = new( TAG_IDLIB ) idMapBrush();
	for( i = 0; i < sides.Num(); i++ )
	{
		brush->AddSide( sides[i] );
	}
	
	brush->epairs = epairs;
	
	return brush;
}

/*
=================
idMapBrush::ParseQ3
=================
*/
idMapBrush* idMapBrush::ParseQ3( idLexer& src, const idVec3& origin )
{
	int i, shift[2], rotate;
	float scale[2];
	idVec3 planepts[3];
	idToken token;
	idList<idMapBrushSide*> sides;
	idMapBrushSide*	side;
	idDict epairs;
	
	do
	{
		if( src.CheckTokenString( "}" ) )
		{
			break;
		}
		
		side = new( TAG_IDLIB ) idMapBrushSide();
		sides.Append( side );
		
		// read the three point plane definition
		if( !src.Parse1DMatrix( 3, planepts[0].ToFloatPtr() ) ||
				!src.Parse1DMatrix( 3, planepts[1].ToFloatPtr() ) ||
				!src.Parse1DMatrix( 3, planepts[2].ToFloatPtr() ) )
		{
			src.Error( "idMapBrush::ParseQ3: unable to read brush side plane definition" );
			sides.DeleteContents( true );
			return NULL;
		}
		
		planepts[0] -= origin;
		planepts[1] -= origin;
		planepts[2] -= origin;
		
		side->plane.FromPoints( planepts[0], planepts[1], planepts[2] );
		
		// read the material
		if( !src.ReadTokenOnLine( &token ) )
		{
			src.Error( "idMapBrush::ParseQ3: unable to read brush side material" );
			sides.DeleteContents( true );
			return NULL;
		}
		
		// we have an implicit 'textures/' in the old format
		side->material = "textures/" + token;
		
		// read the texture shift, rotate and scale
		shift[0] = src.ParseInt();
		shift[1] = src.ParseInt();
		rotate = src.ParseInt();
		scale[0] = src.ParseFloat();
		scale[1] = src.ParseFloat();
		side->texMat[0] = idVec3( 0.03125f, 0.0f, 0.0f );
		side->texMat[1] = idVec3( 0.0f, 0.03125f, 0.0f );
		side->origin = origin;
		
		// Q2 allowed override of default flags and values, but we don't any more
		if( src.ReadTokenOnLine( &token ) )
		{
			if( src.ReadTokenOnLine( &token ) )
			{
				if( src.ReadTokenOnLine( &token ) )
				{
				}
			}
		}
	}
	while( 1 );
	
	idMapBrush* brush = new( TAG_IDLIB ) idMapBrush();
	for( i = 0; i < sides.Num(); i++ )
	{
		brush->AddSide( sides[i] );
	}
	
	brush->epairs = epairs;
	
	return brush;
}

/*
============
idMapBrush::Write
============
*/
bool idMapBrush::Write( idFile* fp, int primitiveNum, const idVec3& origin ) const
{
	int i;
	idMapBrushSide* side;
	
	fp->WriteFloatString( "// primitive %d\n{\n brushDef3\n {\n", primitiveNum );
	
	// write brush epairs
	for( i = 0; i < epairs.GetNumKeyVals(); i++ )
	{
		fp->WriteFloatString( "  \"%s\" \"%s\"\n", epairs.GetKeyVal( i )->GetKey().c_str(), epairs.GetKeyVal( i )->GetValue().c_str() );
	}
	
	// write brush sides
	for( i = 0; i < GetNumSides(); i++ )
	{
		side = GetSide( i );
		fp->WriteFloatString( "  ( %f %f %f %f ) ", side->plane[0], side->plane[1], side->plane[2], side->plane[3] );
		fp->WriteFloatString( "( ( %f %f %f ) ( %f %f %f ) ) \"%s\" 0 0 0\n",
							  side->texMat[0][0], side->texMat[0][1], side->texMat[0][2],
							  side->texMat[1][0], side->texMat[1][1], side->texMat[1][2],
							  side->material.c_str() );
	}
	
	fp->WriteFloatString( " }\n}\n" );
	
	return true;
}

/*
===============
idMapBrush::GetGeometryCRC
===============
*/
unsigned int idMapBrush::GetGeometryCRC() const
{
	int i, j;
	idMapBrushSide* mapSide;
	unsigned int crc;
	
	crc = 0;
	for( i = 0; i < GetNumSides(); i++ )
	{
		mapSide = GetSide( i );
		for( j = 0; j < 4; j++ )
		{
			crc ^= FloatCRC( mapSide->GetPlane()[j] );
		}
		crc ^= StringCRC( mapSide->GetMaterial() );
	}
	
	return crc;
}

/*
================
idMapEntity::Parse
================
*/
idMapEntity* idMapEntity::Parse( idLexer& src, bool worldSpawn, float version )
{
	idToken	token;
	idMapEntity* mapEnt;
	idMapPatch* mapPatch;
	idMapBrush* mapBrush;
	bool worldent;
	idVec3 origin;
	double v1, v2, v3;
	
	if( !src.ReadToken( &token ) )
	{
		return NULL;
	}
	
	if( token != "{" )
	{
		src.Error( "idMapEntity::Parse: { not found, found %s", token.c_str() );
		return NULL;
	}
	
	mapEnt = new( TAG_IDLIB ) idMapEntity();
	
	if( worldSpawn )
	{
		mapEnt->primitives.Resize( 1024, 256 );
	}
	
	origin.Zero();
	worldent = false;
	do
	{
		if( !src.ReadToken( &token ) )
		{
			src.Error( "idMapEntity::Parse: EOF without closing brace" );
			return NULL;
		}
		if( token == "}" )
		{
			break;
		}
		
		if( token == "{" )
		{
			// parse a brush or patch
			if( !src.ReadToken( &token ) )
			{
				src.Error( "idMapEntity::Parse: unexpected EOF" );
				return NULL;
			}
			
			if( worldent )
			{
				origin.Zero();
			}
			
			// if is it a brush: brush, brushDef, brushDef2, brushDef3
			if( token.Icmpn( "brush", 5 ) == 0 )
			{
				mapBrush = idMapBrush::Parse( src, origin, ( !token.Icmp( "brushDef2" ) || !token.Icmp( "brushDef3" ) ), version );
				if( !mapBrush )
				{
					return NULL;
				}
				mapEnt->AddPrimitive( mapBrush );
			}
			// if is it a patch: patchDef2, patchDef3
			else if( token.Icmpn( "patch", 5 ) == 0 )
			{
				mapPatch = idMapPatch::Parse( src, origin, !token.Icmp( "patchDef3" ), version );
				if( !mapPatch )
				{
					return NULL;
				}
				mapEnt->AddPrimitive( mapPatch );
			}
			// assume it's a brush in Q3 or older style
			else
			{
				src.UnreadToken( &token );
				mapBrush = idMapBrush::ParseQ3( src, origin );
				if( !mapBrush )
				{
					return NULL;
				}
				mapEnt->AddPrimitive( mapBrush );
			}
		}
		else
		{
			idStr key, value;
			
			// parse a key / value pair
			key = token;
			src.ReadTokenOnLine( &token );
			value = token;
			
			// strip trailing spaces that sometimes get accidentally
			// added in the editor
			value.StripTrailingWhitespace();
			key.StripTrailingWhitespace();
			
			mapEnt->epairs.Set( key, value );
			
			if( !idStr::Icmp( key, "origin" ) )
			{
				// scanf into doubles, then assign, so it is idVec size independent
				v1 = v2 = v3 = 0;
				sscanf( value, "%lf %lf %lf", &v1, &v2, &v3 );
				origin.x = v1;
				origin.y = v2;
				origin.z = v3;
			}
			else if( !idStr::Icmp( key, "classname" ) && !idStr::Icmp( value, "worldspawn" ) )
			{
				worldent = true;
			}
		}
	}
	while( 1 );
	
	return mapEnt;
}

/*
============
idMapEntity::Write
============
*/
bool idMapEntity::Write( idFile* fp, int entityNum ) const
{
	int i;
	idMapPrimitive* mapPrim;
	idVec3 origin;
	
	fp->WriteFloatString( "// entity %d\n{\n", entityNum );
	
	// write entity epairs
	for( i = 0; i < epairs.GetNumKeyVals(); i++ )
	{
		fp->WriteFloatString( "\"%s\" \"%s\"\n", epairs.GetKeyVal( i )->GetKey().c_str(), epairs.GetKeyVal( i )->GetValue().c_str() );
	}
	
	epairs.GetVector( "origin", "0 0 0", origin );
	
	// write pritimives
	for( i = 0; i < GetNumPrimitives(); i++ )
	{
		mapPrim = GetPrimitive( i );
		
		switch( mapPrim->GetType() )
		{
			case idMapPrimitive::TYPE_BRUSH:
				static_cast<idMapBrush*>( mapPrim )->Write( fp, i, origin );
				break;
			case idMapPrimitive::TYPE_PATCH:
				static_cast<idMapPatch*>( mapPrim )->Write( fp, i, origin );
				break;
		}
	}
	
	fp->WriteFloatString( "}\n" );
	
	return true;
}

/*
===============
idMapEntity::RemovePrimitiveData
===============
*/
void idMapEntity::RemovePrimitiveData()
{
	primitives.DeleteContents( true );
}

/*
===============
idMapEntity::GetGeometryCRC
===============
*/
unsigned int idMapEntity::GetGeometryCRC() const
{
	int i;
	unsigned int crc;
	idMapPrimitive*	mapPrim;
	
	crc = 0;
	for( i = 0; i < GetNumPrimitives(); i++ )
	{
		mapPrim = GetPrimitive( i );
		
		switch( mapPrim->GetType() )
		{
			case idMapPrimitive::TYPE_BRUSH:
				crc ^= static_cast<idMapBrush*>( mapPrim )->GetGeometryCRC();
				break;
			case idMapPrimitive::TYPE_PATCH:
				crc ^= static_cast<idMapPatch*>( mapPrim )->GetGeometryCRC();
				break;
		}
	}
	
	return crc;
}

/*
===============
idMapFile::Parse
===============
*/
bool idMapFile::Parse( const char* filename, bool ignoreRegion, bool osPath )
{
	// no string concatenation for epairs and allow path names for materials
	idLexer src( LEXFL_NOSTRINGCONCAT | LEXFL_NOSTRINGESCAPECHARS | LEXFL_ALLOWPATHNAMES );
	idToken token;
	idStr fullName;
	idMapEntity* mapEnt;
	int i, j, k;
	
	name = filename;
	name.StripFileExtension();
	fullName = name;
	hasPrimitiveData = false;
	
	if( !ignoreRegion )
	{
		// try loading a .reg file first
		fullName.SetFileExtension( "reg" );
		src.LoadFile( fullName, osPath );
	}
	
	if( !src.IsLoaded() )
	{
		// now try a .map file
		fullName.SetFileExtension( "map" );
		src.LoadFile( fullName, osPath );
		if( !src.IsLoaded() )
		{
			// didn't get anything at all
			return false;
		}
	}
	
	version = OLD_MAP_VERSION;
	fileTime = src.GetFileTime();
	entities.DeleteContents( true );
	
	if( src.CheckTokenString( "Version" ) )
	{
		src.ReadTokenOnLine( &token );
		version = token.GetFloatValue();
	}
	
	while( 1 )
	{
		mapEnt = idMapEntity::Parse( src, ( entities.Num() == 0 ), version );
		if( !mapEnt )
		{
			break;
		}
		entities.Append( mapEnt );
	}
	
	SetGeometryCRC();
	
	// if the map has a worldspawn
	if( entities.Num() )
	{
	
		// "removeEntities" "classname" can be set in the worldspawn to remove all entities with the given classname
		const idKeyValue* removeEntities = entities[0]->epairs.MatchPrefix( "removeEntities", NULL );
		while( removeEntities )
		{
			RemoveEntities( removeEntities->GetValue() );
			removeEntities = entities[0]->epairs.MatchPrefix( "removeEntities", removeEntities );
		}
		
		// "overrideMaterial" "material" can be set in the worldspawn to reset all materials
		idStr material;
		if( entities[0]->epairs.GetString( "overrideMaterial", "", material ) )
		{
			for( i = 0; i < entities.Num(); i++ )
			{
				mapEnt = entities[i];
				for( j = 0; j < mapEnt->GetNumPrimitives(); j++ )
				{
					idMapPrimitive* mapPrimitive = mapEnt->GetPrimitive( j );
					switch( mapPrimitive->GetType() )
					{
						case idMapPrimitive::TYPE_BRUSH:
						{
							idMapBrush* mapBrush = static_cast<idMapBrush*>( mapPrimitive );
							for( k = 0; k < mapBrush->GetNumSides(); k++ )
							{
								mapBrush->GetSide( k )->SetMaterial( material );
							}
							break;
						}
						case idMapPrimitive::TYPE_PATCH:
						{
							static_cast<idMapPatch*>( mapPrimitive )->SetMaterial( material );
							break;
						}
					}
				}
			}
		}
		
		// force all entities to have a name key/value pair
		if( entities[0]->epairs.GetBool( "forceEntityNames" ) )
		{
			for( i = 1; i < entities.Num(); i++ )
			{
				mapEnt = entities[i];
				if( !mapEnt->epairs.FindKey( "name" ) )
				{
					mapEnt->epairs.Set( "name", va( "%s%d", mapEnt->epairs.GetString( "classname", "forcedName" ), i ) );
				}
			}
		}
		
		// move the primitives of any func_group entities to the worldspawn
		if( entities[0]->epairs.GetBool( "moveFuncGroups" ) )
		{
			for( i = 1; i < entities.Num(); i++ )
			{
				mapEnt = entities[i];
				if( idStr::Icmp( mapEnt->epairs.GetString( "classname" ), "func_group" ) == 0 )
				{
					entities[0]->primitives.Append( mapEnt->primitives );
					mapEnt->primitives.Clear();
				}
			}
		}
	}
	
	hasPrimitiveData = true;
	return true;
}

/*
============
idMapFile::Write
============
*/
bool idMapFile::Write( const char* fileName, const char* ext, bool fromBasePath )
{
	int i;
	idStr qpath;
	idFile* fp;
	
	qpath = fileName;
	qpath.SetFileExtension( ext );
	
	idLib::common->Printf( "writing %s...\n", qpath.c_str() );
	
	if( fromBasePath )
	{
		fp = idLib::fileSystem->OpenFileWrite( qpath, "fs_basepath" );
	}
	else
	{
		fp = idLib::fileSystem->OpenExplicitFileWrite( qpath );
	}
	
	if( !fp )
	{
		idLib::common->Warning( "Couldn't open %s\n", qpath.c_str() );
		return false;
	}
	
	fp->WriteFloatString( "Version %f\n", ( float ) CURRENT_MAP_VERSION );
	
	for( i = 0; i < entities.Num(); i++ )
	{
		entities[i]->Write( fp, i );
	}
	
	idLib::fileSystem->CloseFile( fp );
	
	return true;
}

/*
===============
idMapFile::SetGeometryCRC
===============
*/
void idMapFile::SetGeometryCRC()
{
	int i;
	
	geometryCRC = 0;
	for( i = 0; i < entities.Num(); i++ )
	{
		geometryCRC ^= entities[i]->GetGeometryCRC();
	}
}

/*
===============
idMapFile::AddEntity
===============
*/
int idMapFile::AddEntity( idMapEntity* mapEnt )
{
	int ret = entities.Append( mapEnt );
	return ret;
}

/*
===============
idMapFile::FindEntity
===============
*/
idMapEntity* idMapFile::FindEntity( const char* name )
{
	for( int i = 0; i < entities.Num(); i++ )
	{
		idMapEntity* ent = entities[i];
		if( idStr::Icmp( ent->epairs.GetString( "name" ), name ) == 0 )
		{
			return ent;
		}
	}
	return NULL;
}

/*
===============
idMapFile::RemoveEntity
===============
*/
void idMapFile::RemoveEntity( idMapEntity* mapEnt )
{
	entities.Remove( mapEnt );
	delete mapEnt;
}

/*
===============
idMapFile::RemoveEntity
===============
*/
void idMapFile::RemoveEntities( const char* classname )
{
	for( int i = 0; i < entities.Num(); i++ )
	{
		idMapEntity* ent = entities[i];
		if( idStr::Icmp( ent->epairs.GetString( "classname" ), classname ) == 0 )
		{
			delete entities[i];
			entities.RemoveIndex( i );
			i--;
		}
	}
}

/*
===============
idMapFile::RemoveAllEntities
===============
*/
void idMapFile::RemoveAllEntities()
{
	entities.DeleteContents( true );
	hasPrimitiveData = false;
}

/*
===============
idMapFile::RemovePrimitiveData
===============
*/
void idMapFile::RemovePrimitiveData()
{
	for( int i = 0; i < entities.Num(); i++ )
	{
		idMapEntity* ent = entities[i];
		ent->RemovePrimitiveData();
	}
	hasPrimitiveData = false;
}

/*
===============
idMapFile::NeedsReload
===============
*/
bool idMapFile::NeedsReload()
{
	if( name.Length() )
	{
		ID_TIME_T time = FILE_NOT_FOUND_TIMESTAMP;
		if( idLib::fileSystem->ReadFile( name, NULL, &time ) > 0 )
		{
			return ( time > fileTime );
		}
	}
	return true;
}