// NOT used in DB structures!
#define STRUCTURE_BASE_TILE			0x00000001
#define STRUCTURE_OPEN				0x00000002
#define STRUCTURE_OPENABLE			0x00000004
// synonyms for STRUCTURE_OPENABLE
#define STRUCTURE_CLOSEABLE			0x00000004
#define STRUCTURE_SEARCHABLE			0x00000004
#define STRUCTURE_HIDDEN			0x00000008

#define STRUCTURE_MOBILE			0x00000010
// STRUCTURE_PASSABLE is set for each structure instance where
// the tile flag TILE_PASSABLE is set
#define STRUCTURE_PASSABLE			0x00000020
#define STRUCTURE_EXPLOSIVE			0x00000040
#define STRUCTURE_TRANSPARENT			0x00000080

#define STRUCTURE_GENERIC			0x00000100
#define STRUCTURE_TREE				0x00000200
#define STRUCTURE_FENCE				0x00000400
#define STRUCTURE_WIREFENCE			0x00000800

#define STRUCTURE_HASITEMONTOP			0x00001000			// ATE: HASITEM: struct has item on top of it
#define STRUCTURE_SPECIAL			0x00002000
#define STRUCTURE_LIGHTSOURCE			0x00004000
#define STRUCTURE_VEHICLE			0x00008000

#define STRUCTURE_WALL				0x00010000
#define STRUCTURE_WALLNWINDOW			0x00020000
#define STRUCTURE_SLIDINGDOOR			0x00040000
#define STRUCTURE_DOOR				0x00080000

// a "multi" structure (as opposed to multitiled) is composed of multiple graphics & structures
#define STRUCTURE_MULTI				0x00100000
#define STRUCTURE_CAVEWALL			0x00200000
#define STRUCTURE_DDOOR_LEFT			0x00400000
#define STRUCTURE_DDOOR_RIGHT			0x00800000

#define STRUCTURE_NORMAL_ROOF			0x01000000
#define STRUCTURE_SLANTED_ROOF			0x02000000
#define STRUCTURE_TALL_ROOF			0x04000000
#define STRUCTURE_SWITCH			0x08000000

#define STRUCTURE_ON_LEFT_WALL			0x10000000
#define STRUCTURE_ON_RIGHT_WALL			0x20000000
#define STRUCTURE_CORPSE			0x40000000
#define STRUCTURE_PERSON			0x80000000

// COMBINATION FLAGS
#define STRUCTURE_ANYFENCE			0x00000C00
#define STRUCTURE_ANYDOOR			0x00CC0000
#define STRUCTURE_OBSTACLE			0x00008F00
#define STRUCTURE_WALLSTUFF			0x00CF0000
#define STRUCTURE_BLOCKSMOVES			0x00208F00
#define STRUCTURE_TYPE_DEFINED			0x8FEF8F00
#define STRUCTURE_ROOF				0x07000000