note description: "[ Represent the direction that an effect come from (an not where it goes, be carefull). Cardinal directions of the haptic device are relative to the positioning of the device. North is considered to be away from the user, south is toward the user, east is right, and west is left of the user: .--. |__| .-------. |=.| |.-----.| |--| || || | | |'-----'| |__|~')_____(' [ COMPUTER ] North (0,-1) ^ | | (-1,0) West <----[ HAPTIC ]----> East (1,0) | | v South (0,1) [ USER ] \|||/ (o o) ---ooO-(_)-Ooo--- ]" author: "Louis Marchand" date: "Tue, 03 Mar 2015 15:22:37 +0000" revision: "2.0" class interface GAME_HAPTIC_DIRECTION create {GAME_HAPTIC_EFFECT} make_by_pointer feature -- Access is_polar: BOOLEAN -- Is Current is represented with polar coordinate require exists: exists is_cartesian: BOOLEAN -- Is Current is represented with cartesian coordinate require exists: exists is_spherical: BOOLEAN -- Is Current is represented with spherical coordinate require exists: exists is_equal (a_other: like Current): BOOLEAN -- Is other attached to an object considered -- equal to current object? is_values_equal (a_other: GAME_HAPTIC_DIRECTION): BOOLEAN -- Are the important values inside Current are equvalent feature -- implementation structure_size: INTEGER_32 -- Size to allocate (in bytes). invariant type_valid: type = {GAME_SDL_EXTERNAL}.sdl_haptic_cartesian or type = {GAME_SDL_EXTERNAL}.sdl_haptic_polar or type = {GAME_SDL_EXTERNAL}.sdl_haptic_spherical end -- class GAME_HAPTIC_DIRECTION
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