module EP
	# values for configurable properties (custom elem's only, else pre-defined)
	DIGGABLE                     = 0
	COLLECTIBLE_ONLY             = 1
	DONT_RUN_INTO                = 2
	DONT_COLLIDE_WITH            = 3
	DONT_TOUCH                   = 4
	INDESTRUCTIBLE               = 5
	SLIPPERY                     = 6
	CAN_CHANGE                   = 7
	CAN_MOVE                     = 8
	CAN_FALL                     = 9
	CAN_SMASH_PLAYER             = 10
	CAN_SMASH_ENEMIES            = 11
	CAN_SMASH_EVERYTHING         = 12
	EXPLODES_BY_FIRE             = 13
	EXPLODES_SMASHED             = 14
	EXPLODES_IMPACT              = 15
	WALKABLE_OVER                = 16
	WALKABLE_INSIDE              = 17
	WALKABLE_UNDER               = 18
	PASSABLE_OVER                = 19
	PASSABLE_INSIDE              = 20
	PASSABLE_UNDER               = 21
	DROPPABLE                    = 22
	EXPLODES_1X1_OLD             = 23
	PUSHABLE                     = 24
	EXPLODES_CROSS_OLD           = 25
	PROTECTED                    = 26
	CAN_MOVE_INTO_ACID           = 27
	THROWABLE                    = 28
	CAN_EXPLODE                  = 29
	GRAVITY_REACHABLE            = 30
	# values for pre-defined properties
	PLAYER                       = 32
	CAN_PASS_MAGIC_WALL          = 33
	SWITCHABLE                   = 34
	BD_ELEMENT                   = 35
	SP_ELEMENT                   = 36
	SB_ELEMENT                   = 37
	GEM                          = 38
	FOOD_DARK_YAMYAM             = 39
	FOOD_PENGUIN                 = 40
	FOOD_PIG                     = 41
	HISTORIC_WALL                = 42
	HISTORIC_SOLID               = 43
	CLASSIC_ENEMY                = 44
	BELT                         = 45
	BELT_ACTIVE                  = 46
	BELT_SWITCH                  = 47
	TUBE                         = 48
	KEYGATE                      = 49
	AMOEBOID                     = 50
	AMOEBALIVE                   = 51
	HAS_EDITOR_CONTENT           = 52
	CAN_TURN_EACH_MOVE           = 53
	CAN_GROW                     = 54
	ACTIVE_BOMB                  = 55
	INACTIVE                     = 56
	# values for special configurable properties (depending on level settings)
	EM_SLIPPERY_WALL             = 57
	# values for special graphics properties (no effect on game engine)
	GFX_CRUMBLED                 = 58
	# values for derived properties (determined from properties above)
	ACCESSIBLE_OVER              = 59
	ACCESSIBLE_INSIDE            = 60
	ACCESSIBLE_UNDER             = 61
	WALKABLE                     = 62
	PASSABLE                     = 63
	ACCESSIBLE                   = 64
	COLLECTIBLE                  = 65
	SNAPPABLE                    = 66
	WALL                         = 67
	SOLID_FOR_PUSHING            = 68
	DRAGONFIRE_PROOF             = 69
	EXPLOSION_PROOF              = 70
	CAN_SMASH                    = 71
	EXPLODES_3X3_OLD             = 72
	CAN_EXPLODE_BY_FIRE          = 73
	CAN_EXPLODE_SMASHED          = 74
	CAN_EXPLODE_IMPACT           = 75
	SP_PORT                      = 76
	CAN_EXPLODE_BY_DRAGONFIRE    = 77
	CAN_EXPLODE_BY_EXPLOSION     = 78
	COULD_MOVE_INTO_ACID         = 79
	MAYBE_DONT_COLLIDE_WITH      = 80
	CAN_BE_CLONED_BY_ANDROID     = 81
	# values for internal purpose only (level editor)
	WALK_TO_OBJECT               = 82
	DEADLY                       = 83
	EDITOR_CASCADE               = 84
	EDITOR_CASCADE_ACTIVE        = 85
	EDITOR_CASCADE_INACTIVE      = 86
	# values for internal purpose only (game engine)
	HAS_ACTION                   = 87
	CAN_CHANGE_OR_HAS_ACTION     = 88
	# values for internal purpose only (other)
	OBSOLETE                     = 89
	
	NUM_ELEMENT_PROPERTIES       = 90
end

module EP
	NUM_EP_BITFIELDS             = ((NUM_ELEMENT_PROPERTIES + 31) / 32)
	EP_BITFIELD_BASE_NR          = 0
	
	EP_BITMASK_BASE_DEFAULT      = (1 << CAN_MOVE_INTO_ACID)
	EP_BITMASK_DEFAULT           = 0
	
# TODO make property bitmasks right
	PROPERTY_BIT(p)              (1 << ((p) % 32))
	PROPERTY_VAR(e,p)            (element_info[e].properties[(p) / 32])
	HAS_PROPERTY(e,p)    ((PROPERTY_VAR(e, p) & (1 << (p % 32))) != 0)
	SET_PROPERTY(e,p,v)  ((v) ? (PROPERTY_VAR(e,p) |=  (1 << (p % 32))) : \
	                            (PROPERTY_VAR(e,p) &= ~(1 << (p % 32))))
end