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User Interface. Dr. Scott Schaefer. User Interface. Make it simple/easy to do common tasks Don’t obscure the FOV Simpler is typically better Consistency is important!. Diablo. Warcraft 3. Starcraft 2. World of Warcraft. Quake 3. Quake 4. Madden ‘09. Game Control. - PowerPoint PPT Presentation
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User Interface
Dr. Scott Schaefer
User Interface
• Make it simple/easy to do common tasks
• Don’t obscure the FOV
• Simpler is typically better
• Consistency is important!
Diablo
Warcraft 3
Starcraft 2
World of Warcraft
Quake 3
Quake 4
Madden ‘09
Game Control
• Must consider single/multi-player aspect• Single player?• Networked multi-player?• Multi-player same machine?
• Platform limitations
Game Control: Keyboard/Mouse
• Connected to every PC but lacking on most other platforms
• Fine for single player or
multi-player networked
• Lots of buttons!
Game Control: Joystick
• Found on most consoles• Can also be connect to
PC via USB• Win NT supports 2 joysticks• Later versions support 16 joysticks• If you want to use joysticks for your game,
you can check out Xbox controllers from me for the semester. I only have 16 though.
Game Control: Others
Joystick Programming with Win32
#include <windows.h>
#include <mmsystem.h>
int joyGetNumDevs ( void )• Returns: number of joysticks supported by driver
(not number connected to machine)
Joystick Programming with Win32
MMResult joyGetDevCaps ( int id, JOYCAPS* cap, int size )
• id: id of the joystick being tested (-1 through 15)• cap: pointer to a JOYCAP structure• size: size of structure pointed to by cap• Returns: JOYERR_NOERROR if no error
Joystick Programming with Win32
• typedef struct { short wMid; short wPid; char szPname[MAXPNAMELEN]; unsigned int wXmin, wXmax, wYmin, wYmax, wZmin, wZmax; unsigned int wNumButtons; unsigned int wPeriodMin, wPeriodMax; unsigned int wRmin, wRmax, wUmin, wUmax, wVmin, wVmax; unsigned int wCaps; unsigned int wMaxAxes; unsigned int wNumAxes; unsigned int wMaxButtons; char szRegKey[MAXPNAMELEN]; char szOEMVxD[MAX_JOYSTICKOEMVXDNAME];
} JOYCAPS;
Joystick Programming with Win32
• typedef struct { short wMid; short wPid; char szPname[MAXPNAMELEN]; unsigned int wXmin, wXmax, wYmin, wYmax, wZmin, wZmax; unsigned int wNumButtons; unsigned int wPeriodMin, wPeriodMax; unsigned int wRmin, wRmax, wUmin, wUmax, wVmin, wVmax; unsigned int wCaps; unsigned int wMaxAxes; unsigned int wNumAxes; unsigned int wMaxButtons; char szRegKey[MAXPNAMELEN]; char szOEMVxD[MAX_JOYSTICKOEMVXDNAME];
} JOYCAPS;
number of buttons
Joystick Programming with Win32
• typedef struct { short wMid; short wPid; char szPname[MAXPNAMELEN]; unsigned int wXmin, wXmax, wYmin, wYmax, wZmin, wZmax; unsigned int wNumButtons; unsigned int wPeriodMin, wPeriodMax; unsigned int wRmin, wRmax, wUmin, wUmax, wVmin, wVmax; unsigned int wCaps; unsigned int wMaxAxes; unsigned int wNumAxes; unsigned int wMaxButtons; char szRegKey[MAXPNAMELEN]; char szOEMVxD[MAX_JOYSTICKOEMVXDNAME];
} JOYCAPS;
min/max bounds for “hat” controllers
Joystick Programming with Win32
MMResult joyGetPosEx ( int id, JOYINFOEX* info)
• id: id of the joystick being tested (-1 through 15)• info: pointer to a JOYINFOEX structure• Returns: JOYERR_NOERROR if no error
JOYERR_UNPLUGGED if joystick not connected
Joystick Programming with Win32
• typedef struct { int dwSize; int dwFlags; int dwXpos, dwYpos, dwZpos;int dwRpos, dwUpos, dwVpos;int dwButtons; int dwButtonNumber; int dwPOV; int dwReserved1; int dwReserved2;
} JOYINFOEX;
Joystick Programming with Win32
• typedef struct { int dwSize; int dwFlags; int dwXpos, dwYpos, dwZpos;int dwRpos, dwUpos, dwVpos;int dwButtons; int dwButtonNumber; int dwPOV; int dwReserved1; int dwReserved2;
} JOYINFOEX;
MUST be sizeof( JOYINFOEX)
Joystick Programming with Win32
• typedef struct { int dwSize; int dwFlags; int dwXpos, dwYpos, dwZpos;int dwRpos, dwUpos, dwVpos;int dwButtons; int dwButtonNumber; int dwPOV; int dwReserved1; int dwReserved2;
} JOYINFOEX;
SHOULD be JOY_RETURNALL
Joystick Programming with Win32
• typedef struct { int dwSize; int dwFlags; int dwXpos, dwYpos, dwZpos;int dwRpos, dwUpos, dwVpos;int dwButtons; int dwButtonNumber; int dwPOV; int dwReserved1; int dwReserved2;
} JOYINFOEX;
position of “hat” controllers
Joystick Programming with Win32
• typedef struct { int dwSize; int dwFlags; int dwXpos, dwYpos, dwZpos;int dwRpos, dwUpos, dwVpos;int dwButtons; int dwButtonNumber; int dwPOV; int dwReserved1; int dwReserved2;
} JOYINFOEX;
bit array with bit set if button currently pressed
Joystick Programming with Win32
• typedef struct { int dwSize; int dwFlags; int dwXpos, dwYpos, dwZpos;int dwRpos, dwUpos, dwVpos;int dwButtons; int dwButtonNumber; int dwPOV; int dwReserved1; int dwReserved2;
} JOYINFOEX;
number of buttons pressed
Joystick Programming with Win32
• typedef struct { int dwSize; int dwFlags; int dwXpos, dwYpos, dwZpos;int dwRpos, dwUpos, dwVpos;int dwButtons; int dwButtonNumber; int dwPOV; int dwReserved1; int dwReserved2;
} JOYINFOEX;
angle of POV controller
