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	/****************************************************************************
	**
	** This file is part of the LibreCAD project, a 2D CAD program
	**
	** Copyright (C) 2010 R. van Twisk (librecad@rvt.dds.nl)
	** Copyright (C) 2001-2003 RibbonSoft. All rights reserved.
	**
	**
	** This file may be distributed and/or modified under the terms of the
	** GNU General Public License version 2 as published by the Free Software
	** Foundation and appearing in the file gpl-2.0.txt included in the
	** packaging of this file.
	**
	** This program 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 this program; if not, write to the Free Software
	** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	**
	** This copyright notice MUST APPEAR in all copies of the script!
	**
	**********************************************************************/

	/**
	* Defines common DXF codes and constants.
	*/

	#ifndef DXF_CODES_H
	#define DXF_CODES_H

	#if _MSC_VER > 1000
	#pragma once
	#endif // _MSC_VER > 1000

	#if defined(__OS2__)\|\|defined(__EMX__)\|\|defined(_WIN32)
	# ifndef strcasecmp
	# define strcasecmp(s,t) stricmp(s,t)
	# endif
	#endif


	#ifdef _WIN32
	# undef M_PI
	# define M_PI 3.14159265358979323846
	# ifdef _MSC_VER
	# pragma warning(disable : 4800)
	# endif
	#endif

	#ifndef M_PI
	#define M_PI 3.1415926535897932384626433832795
	#endif

	#define DL_DXF_MAXLINE 1024
	#define DL_DXF_MAXGROUPCODE 1100

	// used to mark invalid vectors:
	//#define DL_DXF_MAXDOUBLE 1.0E+10

	/**
	* Codes for colors and DXF versions.
	*/
	class DL_Codes {
	public:
	/**
	* Standard DXF colors.
	*/
	enum color {
	black = 250,
	green = 3,
	red = 1,
	brown = 15,
	yellow = 2,
	cyan = 4,
	magenta = 6,
	gray = 8,
	blue = 5,
	l_blue = 163,
	l_green = 121,
	l_cyan = 131,
	l_red = 23,
	l_magenta = 221,
	l_gray = 252,
	white = 7,
	bylayer = 256,
	byblock = 0
	};

	/**
	* Version numbers for the DXF Format.
	*/
	enum version {
	AC1009, AC1012, AC1014, AC1015
	};
	};


	// Extended color palette:
	// The first entry is only for direct indexing starting with [1]
	// Color 1 is red (1,0,0)
	const double dxfColors[][3] = {
	{0,0,0}, // unused
	{1,0,0}, // 1
	{1,1,0},
	{0,1,0},
	{0,1,1},
	{0,0,1},
	{1,0,1},
	{1,1,1}, // black or white
	{0.5,0.5,0.5},
	{0.75,0.75,0.75},
	{1,0,0}, // 10
	{1,0.5,0.5},
	{0.65,0,0},
	{0.65,0.325,0.325},
	{0.5,0,0},
	{0.5,0.25,0.25},
	{0.3,0,0},
	{0.3,0.15,0.15},
	{0.15,0,0},
	{0.15,0.075,0.075},
	{1,0.25,0}, // 20
	{1,0.625,0.5},
	{0.65,0.1625,0},
	{0.65,0.4063,0.325},
	{0.5,0.125,0},
	{0.5,0.3125,0.25},
	{0.3,0.075,0},
	{0.3,0.1875,0.15},
	{0.15,0.0375,0},
	{0.15,0.0938,0.075},
	{1,0.5,0}, // 30
	{1,0.75,0.5},
	{0.65,0.325,0},
	{0.65,0.4875,0.325},
	{0.5,0.25,0},
	{0.5,0.375,0.25},
	{0.3,0.15,0},
	{0.3,0.225,0.15},
	{0.15,0.075,0},
	{0.15,0.1125,0.075},
	{1,0.75,0}, // 40
	{1,0.875,0.5},
	{0.65,0.4875,0},
	{0.65,0.5688,0.325},
	{0.5,0.375,0},
	{0.5,0.4375,0.25},
	{0.3,0.225,0},
	{0.3,0.2625,0.15},
	{0.15,0.1125,0},
	{0.15,0.1313,0.075},
	{1,1,0}, // 50
	{1,1,0.5},
	{0.65,0.65,0},
	{0.65,0.65,0.325},
	{0.5,0.5,0},
	{0.5,0.5,0.25},
	{0.3,0.3,0},
	{0.3,0.3,0.15},
	{0.15,0.15,0},
	{0.15,0.15,0.075},
	{0.75,1,0}, // 60
	{0.875,1,0.5},
	{0.4875,0.65,0},
	{0.5688,0.65,0.325},
	{0.375,0.5,0},
	{0.4375,0.5,0.25},
	{0.225,0.3,0},
	{0.2625,0.3,0.15},
	{0.1125,0.15,0},
	{0.1313,0.15,0.075},
	{0.5,1,0}, // 70
	{0.75,1,0.5},
	{0.325,0.65,0},
	{0.4875,0.65,0.325},
	{0.25,0.5,0},
	{0.375,0.5,0.25},
	{0.15,0.3,0},
	{0.225,0.3,0.15},
	{0.075,0.15,0},
	{0.1125,0.15,0.075},
	{0.25,1,0}, // 80
	{0.625,1,0.5},
	{0.1625,0.65,0},
	{0.4063,0.65,0.325},
	{0.125,0.5,0},
	{0.3125,0.5,0.25},
	{0.075,0.3,0},
	{0.1875,0.3,0.15},
	{0.0375,0.15,0},
	{0.0938,0.15,0.075},
	{0,1,0}, // 90
	{0.5,1,0.5},
	{0,0.65,0},
	{0.325,0.65,0.325},
	{0,0.5,0},
	{0.25,0.5,0.25},
	{0,0.3,0},
	{0.15,0.3,0.15},
	{0,0.15,0},
	{0.075,0.15,0.075},
	{0,1,0.25}, // 100
	{0.5,1,0.625},
	{0,0.65,0.1625},
	{0.325,0.65,0.4063},
	{0,0.5,0.125},
	{0.25,0.5,0.3125},
	{0,0.3,0.075},
	{0.15,0.3,0.1875},
	{0,0.15,0.0375},
	{0.075,0.15,0.0938},
	{0,1,0.5}, // 110
	{0.5,1,0.75},
	{0,0.65,0.325},
	{0.325,0.65,0.4875},
	{0,0.5,0.25},
	{0.25,0.5,0.375},
	{0,0.3,0.15},
	{0.15,0.3,0.225},
	{0,0.15,0.075},
	{0.075,0.15,0.1125},
	{0,1,0.75}, // 120
	{0.5,1,0.875},
	{0,0.65,0.4875},
	{0.325,0.65,0.5688},
	{0,0.5,0.375},
	{0.25,0.5,0.4375},
	{0,0.3,0.225},
	{0.15,0.3,0.2625},
	{0,0.15,0.1125},
	{0.075,0.15,0.1313},
	{0,1,1}, // 130
	{0.5,1,1},
	{0,0.65,0.65},
	{0.325,0.65,0.65},
	{0,0.5,0.5},
	{0.25,0.5,0.5},
	{0,0.3,0.3},
	{0.15,0.3,0.3},
	{0,0.15,0.15},
	{0.075,0.15,0.15},
	{0,0.75,1}, // 140
	{0.5,0.875,1},
	{0,0.4875,0.65},
	{0.325,0.5688,0.65},
	{0,0.375,0.5},
	{0.25,0.4375,0.5},
	{0,0.225,0.3},
	{0.15,0.2625,0.3},
	{0,0.1125,0.15},
	{0.075,0.1313,0.15},
	{0,0.5,1}, // 150
	{0.5,0.75,1},
	{0,0.325,0.65},
	{0.325,0.4875,0.65},
	{0,0.25,0.5},
	{0.25,0.375,0.5},
	{0,0.15,0.3},
	{0.15,0.225,0.3},
	{0,0.075,0.15},
	{0.075,0.1125,0.15},
	{0,0.25,1}, // 160
	{0.5,0.625,1},
	{0,0.1625,0.65},
	{0.325,0.4063,0.65},
	{0,0.125,0.5},
	{0.25,0.3125,0.5},
	{0,0.075,0.3},
	{0.15,0.1875,0.3},
	{0,0.0375,0.15},
	{0.075,0.0938,0.15},
	{0,0,1}, // 170
	{0.5,0.5,1},
	{0,0,0.65},
	{0.325,0.325,0.65},
	{0,0,0.5},
	{0.25,0.25,0.5},
	{0,0,0.3},
	{0.15,0.15,0.3},
	{0,0,0.15},
	{0.075,0.075,0.15},
	{0.25,0,1}, // 180
	{0.625,0.5,1},
	{0.1625,0,0.65},
	{0.4063,0.325,0.65},
	{0.125,0,0.5},
	{0.3125,0.25,0.5},
	{0.075,0,0.3},
	{0.1875,0.15,0.3},
	{0.0375,0,0.15},
	{0.0938,0.075,0.15},
	{0.5,0,1}, // 190
	{0.75,0.5,1},
	{0.325,0,0.65},
	{0.4875,0.325,0.65},
	{0.25,0,0.5},
	{0.375,0.25,0.5},
	{0.15,0,0.3},
	{0.225,0.15,0.3},
	{0.075,0,0.15},
	{0.1125,0.075,0.15},
	{0.75,0,1}, // 200
	{0.875,0.5,1},
	{0.4875,0,0.65},
	{0.5688,0.325,0.65},
	{0.375,0,0.5},
	{0.4375,0.25,0.5},
	{0.225,0,0.3},
	{0.2625,0.15,0.3},
	{0.1125,0,0.15},
	{0.1313,0.075,0.15},
	{1,0,1}, // 210
	{1,0.5,1},
	{0.65,0,0.65},
	{0.65,0.325,0.65},
	{0.5,0,0.5},
	{0.5,0.25,0.5},
	{0.3,0,0.3},
	{0.3,0.15,0.3},
	{0.15,0,0.15},
	{0.15,0.075,0.15},
	{1,0,0.75}, // 220
	{1,0.5,0.875},
	{0.65,0,0.4875},
	{0.65,0.325,0.5688},
	{0.5,0,0.375},
	{0.5,0.25,0.4375},
	{0.3,0,0.225},
	{0.3,0.15,0.2625},
	{0.15,0,0.1125},
	{0.15,0.075,0.1313},
	{1,0,0.5}, // 230
	{1,0.5,0.75},
	{0.65,0,0.325},
	{0.65,0.325,0.4875},
	{0.5,0,0.25},
	{0.5,0.25,0.375},
	{0.3,0,0.15},
	{0.3,0.15,0.225},
	{0.15,0,0.075},
	{0.15,0.075,0.1125},
	{1,0,0.25}, // 240
	{1,0.5,0.625},
	{0.65,0,0.1625},
	{0.65,0.325,0.4063},
	{0.5,0,0.125},
	{0.5,0.25,0.3125},
	{0.3,0,0.075},
	{0.3,0.15,0.1875},
	{0.15,0,0.0375},
	{0.15,0.075,0.0938},
	{0.33,0.33,0.33}, // 250
	{0.464,0.464,0.464},
	{0.598,0.598,0.598},
	{0.732,0.732,0.732},
	{0.866,0.866,0.866},
	{1,1,1} // 255
	}
	;


	// AutoCAD VERSION aliases
	#define VER_R12 DL_Codes::AC1009
	#define VER_LT2 DL_Codes::AC1009
	#define VER_R13 DL_Codes::AC1012 // not supported yet
	#define VER_LT95 DL_Codes::AC1012 // not supported yet
	#define VER_R14 DL_Codes::AC1014 // not supported yet
	#define VER_LT97 DL_Codes::AC1014 // not supported yet
	#define VER_LT98 DL_Codes::AC1014 // not supported yet
	#define VER_2000 DL_Codes::AC1015
	#define VER_2002 DL_Codes::AC1015


	// DXF Group Codes:

	// Strings
	#define STRGRP_START 0
	#define STRGRP_END 9

	// Coordinates
	#define CRDGRP_START 10
	#define CRDGRP_END 19

	// Real values
	#define RLGRP_START 38
	#define RLGRP_END 59

	// Short integer values
	#define SHOGRP_START 60
	#define SHOGRP_END 79

	// New in Release 13,
	#define SUBCLASS 100

	// More coordinates
	#define CRD2GRP_START 210
	#define CRD2GRP_END 239

	// Extended data strings
	#define ESTRGRP_START 1000
	#define ESTRGRP_END 1009

	// Extended data reals
	#define ERLGRP_START 1010
	#define ERLGRP_END 1059


	#define Y8_COORD_CODE 28
	#define Z0_COORD_CODE 30
	#define Z8_COORD_CODE 38

	#define POINT_COORD_CODE 10
	#define INSERT_COORD_CODE 10

	#define CRD2GRP_START 210
	#define CRD2GRP_END 239

	#define THICKNESS 39
	#define FIRST_REAL_CODE THICKNESS
	#define LAST_REAL_CODE 59
	#define FIRST_INT_CODE 60
	#define ATTFLAGS_CODE 70
	#define PLINE_FLAGS_CODE 70
	#define LAYER_FLAGS_CODE 70
	#define FLD_LEN_CODE 73 // Inside ATTRIB resbuf
	#define LAST_INT_CODE 79
	#define X_EXTRU_CODE 210
	#define Y_EXTRU_CODE 220
	#define Z_EXTRU_CODE 230
	#define COMMENT_CODE 999

	// Start and endpoints of a line
	#define LINE_START_CODE 10 // Followed by x coord
	#define LINE_END_CODE 11 // Followed by x coord

	// Some codes used by blocks
	#define BLOCK_FLAGS_CODE 70 // An int containing flags
	#define BLOCK_BASE_CODE 10 // Origin of block definition
	#define XREF_DEPENDENT 16 // If a block contains an XREF
	#define XREF_RESOLVED 32 // If a XREF resolved ok
	#define REFERENCED 64 // If a block is ref'd in DWG

	#define XSCALE_CODE 41
	#define YSCALE_CODE 42
	#define ANGLE_CODE 50
	#define INS_POINT_CODE 10 // Followed by x of ins pnt
	#define NAME2_CODE 3 // Second appearance of name

	// Some codes used by circle entities
	#define CENTER_CODE 10 // Followed by x of center
	#define RADIUS_CODE 40 // Followd by radius of circle

	#define COND_OP_CODE -4 // Conditional op,ads_ssget

	// When using ads_buildlist you MUST use RTDXF0 instead of these
	#define ENTITY_TYPE_CODE 0 // Then there is LINE, 3DFACE..
	#define SES_CODE 0 // Start End String Code
	#define FILE_SEP_CODE 0 // File separator
	#define SOT_CODE 0 // Start Of Table
	#define TEXTVAL_CODE 1
	#define NAME_CODE 2
	#define BLOCK_NAME_CODE 2
	#define SECTION_NAME_CODE 2
	#define ENT_HAND_CODE 5 // What follows is hexa string
	#define TXT_STYLE_CODE 7 // Inside attributes
	#define LAYER_NAME_CODE 8 // What follows is layer name
	#define FIRST_XCOORD_CODE 10 // Group code x of 1st coord
	#define FIRST_YCOORD_CODE 20 // Group code y of 1st coord
	#define FIRST_ZCOORD_CODE 30 // Group code z of 1st coord
	#define L_START_CODE 10
	#define L_END_CODE 11
	#define TXTHI_CODE 40
	#define SCALE_X_CODE 41
	#define SCALE_Y_CODE 42
	#define SCALE_Z_CODE 43
	#define BULGE_CODE 42 // Used in PLINE verts for arcs
	#define ROTATION_CODE 50
	#define COLOUR_CODE 62 // What follows is a color int
	#define LTYPE_CODE 6 // What follows is a linetype


	// Attribute flags
	#define ATTS_FOLLOW_CODE 66
	#define ATT_TAG_CODE 2
	#define ATT_VAL_CODE 1
	#define ATT_FLAGS_CODE 70 // 4 1 bit flags as follows...
	#define ATT_INVIS_FLAG 1
	#define ATT_CONST_FLAG 2
	#define ATT_VERIFY_FLAG 4 // Prompt and verify
	#define ATT_PRESET_FLAG 8 // No prompt and no verify

	// PLINE defines
	// Flags
	#define OPEN_PLINE 0x00
	#define CLOSED_PLINE 0x01
	#define POLYLINE3D 0x80
	#define PFACE_MESH 0x40
	#define PGON_MESH 0x10
	// Vertices follow entity, required in POLYLINES
	#define VERTS_FOLLOW_CODE 66 // Value should always be 1
	#define VERTEX_COORD_CODE 10


	// LAYER flags
	#define FROZEN 1
	#define FROZEN_BY_DEF 2
	#define LOCKED 4
	#define OBJECT_USED 64 // Object is ref'd in the dwg

	#define BLOCK_EN_CODE -2 // Block entity definition
	#define E_NAME -1 // Entity name

	// Extended data codes
	#define EXTD_SENTINEL (-3)
	#define EXTD_STR 1000
	#define EXTD_APP_NAME 1001
	#define EXTD_CTL_STR 1002
	#define EXTD_LYR_STR 1003
	#define EXTD_CHUNK 1004
	#define EXTD_HANDLE 1005
	#define EXTD_POINT 1010
	#define EXTD_POS 1011
	#define EXTD_DISP 1012
	#define EXTD_DIR 1013
	#define EXTD_FLOAT 1040
	#define EXTD_DIST 1041
	#define EXTD_SCALE 1042
	#define EXTD_INT16 1070
	#define EXTD_INT32 1071

	// UCS codes for use in ads_trans
	#define WCS_TRANS_CODE 0
	#define UCS_TRANS_CODE 1
	#define DCS_TRANS_CODE 2
	#define PCS_TRANS_CODE 3

	#endif