Keyboard Input - GameCreators Forum

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reapz

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Posted: 11th Jun 2009 05:22

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Hey,

I'm looking for a method to get keyboard input for a game without using scan codes, as the scan codes can change from keyboard to keyboard.

If this is wrong let me know, but is there a way to get the ASCII codes for key presses, more importantly for multiple keys being held down etc at the same time.

Or perhaps a way to override KEY_DOWN or do something like that?

Appreciated

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kklouzal

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Posted: 11th Jun 2009 07:32

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dbGetEntry(); returns a char* of keys pressed on the keyboard in this format: a, A, #, @,

You could possibly use that with
dbClearEntryBuffer(); which basically resets the variable that dbGetEntry(); holds back to NULL

Come Check Out My W.I.P Post: http://forum.thegamecreators.com/?m=forum_view&t=151415&b=8

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ABXG

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Posted: 11th Jun 2009 21:32

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The problem with dbEntry is that it doesn't filter out escape characters, meaning you have to do that all manually. I am actually working on a class that can be used to replace dbEntry, which fixes all of it's pitfalls. I am actually almost done it. I really just have to implement a word wrap feature and one or two more behavioral options and that's about it.

At the moment the class has 31 member functions which gives you a lot of control over the output/input behavior.

------------------------------------
Currently 1500+ lines of code into an "over-the-shoulder" action RPG with combat based on rag-doll physics.

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reapz

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Posted: 12th Jun 2009 05:28

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I did try with dbGetEntry, unfortunately I don't think it keeps adding a keychar if you hold a key down.

I solved the problem, it appears (I hope) that scan codes are in fact consistant between QWERTY keyboards so I used the dbKeyState(pass in scancode of key) function. This works well assuming that the scan codes are common, going with that for the moment.

Sounds good ABXG. Here's what I have atm, very simple but it works with multiple keypresses.

+ Code Snippet

const static int KEY_W = 17;
const static int KEY_A = 30;
const static int KEY_S = 31;
const static int KEY_D = 32;
const static int KEY_UP = 200;
const static int KEY_DOWN = 208;
const static int KEY_LEFT = 203;
const static int KEY_RIGHT = 205;

bool Input::isKeyDown(int scanCode)
{
	if (dbKeyState(scanCode))
		return true;

	return false;
}

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GPZ

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Posted: 16th Jul 2009 11:07

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Reapz, excellent... This is nearly identical to the DXInput code I was using. Sounds like it will work perfectly for DarkGDK (and as you stated, it DOES work). Getting back into Dark*anything has made me forget some things as simple as separating key_up from key_down because of the list of commands that are supposed to aid in this sort of thing. Reguardless, some of the documented commands aren't even included in the DarkSDK libs - has anyone ever tried using dbCheckListQuantity()? That's off topic, but an example of one of the struggles I've had using DarkGDK (especially, struggling with glitchy input commands).

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DnB

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Posted: 10th Aug 2009 14:47

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I just use dinput

+ Code Snippet

#include "dinput.h"

while ( LoopGDK ( ) )
	{

if(dbKeyState(DIK_B)
{

//code here

} //end of if

        }// end of main loop

And You just replace B with whatever. Ill try to post the complete list here in a bit.

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DnB

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Posted: 19th Aug 2009 23:21

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List of dinput codes

/****************************************************************************
 *
 *      DirectInput keyboard scan codes
 *
 ****************************************************************************/
#define DIK_ESCAPE          0x01
#define DIK_1               0x02
#define DIK_2               0x03
#define DIK_3               0x04
#define DIK_4               0x05
#define DIK_5               0x06
#define DIK_6               0x07
#define DIK_7               0x08
#define DIK_8               0x09
#define DIK_9               0x0A
#define DIK_0               0x0B
#define DIK_MINUS           0x0C    /* - on main keyboard */
#define DIK_EQUALS          0x0D
#define DIK_BACK            0x0E    /* backspace */
#define DIK_TAB             0x0F
#define DIK_Q               0x10
#define DIK_W               0x11
#define DIK_E               0x12
#define DIK_R               0x13
#define DIK_T               0x14
#define DIK_Y               0x15
#define DIK_U               0x16
#define DIK_I               0x17
#define DIK_O               0x18
#define DIK_P               0x19
#define DIK_LBRACKET        0x1A
#define DIK_RBRACKET        0x1B
#define DIK_RETURN          0x1C    /* Enter on main keyboard */
#define DIK_LCONTROL        0x1D
#define DIK_A               0x1E
#define DIK_S               0x1F
#define DIK_D               0x20
#define DIK_F               0x21
#define DIK_G               0x22
#define DIK_H               0x23
#define DIK_J               0x24
#define DIK_K               0x25
#define DIK_L               0x26
#define DIK_SEMICOLON       0x27
#define DIK_APOSTROPHE      0x28
#define DIK_GRAVE           0x29    /* accent grave */
#define DIK_LSHIFT          0x2A
#define DIK_BACKSLASH       0x2B
#define DIK_Z               0x2C
#define DIK_X               0x2D
#define DIK_C               0x2E
#define DIK_V               0x2F
#define DIK_B               0x30
#define DIK_N               0x31
#define DIK_M               0x32
#define DIK_COMMA           0x33
#define DIK_PERIOD          0x34    /* . on main keyboard */
#define DIK_SLASH           0x35    /* / on main keyboard */
#define DIK_RSHIFT          0x36
#define DIK_MULTIPLY        0x37    /* * on numeric keypad */
#define DIK_LMENU           0x38    /* left Alt */
#define DIK_SPACE           0x39
#define DIK_CAPITAL         0x3A
#define DIK_F1              0x3B
#define DIK_F2              0x3C
#define DIK_F3              0x3D
#define DIK_F4              0x3E
#define DIK_F5              0x3F
#define DIK_F6              0x40
#define DIK_F7              0x41
#define DIK_F8              0x42
#define DIK_F9              0x43
#define DIK_F10             0x44
#define DIK_NUMLOCK         0x45
#define DIK_SCROLL          0x46    /* Scroll Lock */
#define DIK_NUMPAD7         0x47
#define DIK_NUMPAD8         0x48
#define DIK_NUMPAD9         0x49
#define DIK_SUBTRACT        0x4A    /* - on numeric keypad */
#define DIK_NUMPAD4         0x4B
#define DIK_NUMPAD5         0x4C
#define DIK_NUMPAD6         0x4D
#define DIK_ADD             0x4E    /* + on numeric keypad */
#define DIK_NUMPAD1         0x4F
#define DIK_NUMPAD2         0x50
#define DIK_NUMPAD3         0x51
#define DIK_NUMPAD0         0x52
#define DIK_DECIMAL         0x53    /* . on numeric keypad */
#define DIK_OEM_102         0x56    /* <> or \| on RT 102-key keyboard (Non-U.S.) */
#define DIK_F11             0x57
#define DIK_F12             0x58
#define DIK_F13             0x64    /*                     (NEC PC98) */
#define DIK_F14             0x65    /*                     (NEC PC98) */
#define DIK_F15             0x66    /*                     (NEC PC98) */
#define DIK_KANA            0x70    /* (Japanese keyboard)            */
#define DIK_ABNT_C1         0x73    /* /? on Brazilian keyboard */
#define DIK_CONVERT         0x79    /* (Japanese keyboard)            */
#define DIK_NOCONVERT       0x7B    /* (Japanese keyboard)            */
#define DIK_YEN             0x7D    /* (Japanese keyboard)            */
#define DIK_ABNT_C2         0x7E    /* Numpad . on Brazilian keyboard */
#define DIK_NUMPADEQUALS    0x8D    /* = on numeric keypad (NEC PC98) */
#define DIK_PREVTRACK       0x90    /* Previous Track (DIK_CIRCUMFLEX on Japanese keyboard) */
#define DIK_AT              0x91    /*                     (NEC PC98) */
#define DIK_COLON           0x92    /*                     (NEC PC98) */
#define DIK_UNDERLINE       0x93    /*                     (NEC PC98) */
#define DIK_KANJI           0x94    /* (Japanese keyboard)            */
#define DIK_STOP            0x95    /*                     (NEC PC98) */
#define DIK_AX              0x96    /*                     (Japan AX) */
#define DIK_UNLABELED       0x97    /*                        (J3100) */
#define DIK_NEXTTRACK       0x99    /* Next Track */
#define DIK_NUMPADENTER     0x9C    /* Enter on numeric keypad */
#define DIK_RCONTROL        0x9D
#define DIK_MUTE            0xA0    /* Mute */
#define DIK_CALCULATOR      0xA1    /* Calculator */
#define DIK_PLAYPAUSE       0xA2    /* Play / Pause */
#define DIK_MEDIASTOP       0xA4    /* Media Stop */
#define DIK_VOLUMEDOWN      0xAE    /* Volume - */
#define DIK_VOLUMEUP        0xB0    /* Volume + */
#define DIK_WEBHOME         0xB2    /* Web home */
#define DIK_NUMPADCOMMA     0xB3    /* , on numeric keypad (NEC PC98) */
#define DIK_DIVIDE          0xB5    /* / on numeric keypad */
#define DIK_SYSRQ           0xB7
#define DIK_RMENU           0xB8    /* right Alt */
#define DIK_PAUSE           0xC5    /* Pause */
#define DIK_HOME            0xC7    /* Home on arrow keypad */
#define DIK_UP              0xC8    /* UpArrow on arrow keypad */
#define DIK_PRIOR           0xC9    /* PgUp on arrow keypad */
#define DIK_LEFT            0xCB    /* LeftArrow on arrow keypad */
#define DIK_RIGHT           0xCD    /* RightArrow on arrow keypad */
#define DIK_END             0xCF    /* End on arrow keypad */
#define DIK_DOWN            0xD0    /* DownArrow on arrow keypad */
#define DIK_NEXT            0xD1    /* PgDn on arrow keypad */
#define DIK_INSERT          0xD2    /* Insert on arrow keypad */
#define DIK_DELETE          0xD3    /* Delete on arrow keypad */
#define DIK_LWIN            0xDB    /* Left Windows key */
#define DIK_RWIN            0xDC    /* Right Windows key */
#define DIK_APPS            0xDD    /* AppMenu key */
#define DIK_POWER           0xDE    /* System Power */
#define DIK_SLEEP           0xDF    /* System Sleep */
#define DIK_WAKE            0xE3    /* System Wake */
#define DIK_WEBSEARCH       0xE5    /* Web Search */
#define DIK_WEBFAVORITES    0xE6    /* Web Favorites */
#define DIK_WEBREFRESH      0xE7    /* Web Refresh */
#define DIK_WEBSTOP         0xE8    /* Web Stop */
#define DIK_WEBFORWARD      0xE9    /* Web Forward */
#define DIK_WEBBACK         0xEA    /* Web Back */
#define DIK_MYCOMPUTER      0xEB    /* My Computer */
#define DIK_MAIL            0xEC    /* Mail */
#define DIK_MEDIASELECT     0xED    /* Media Select */

/*
 *  Alternate names for keys, to facilitate transition from DOS.
 */
#define DIK_BACKSPACE       DIK_BACK            /* backspace */
#define DIK_NUMPADSTAR      DIK_MULTIPLY        /* * on numeric keypad */
#define DIK_LALT            DIK_LMENU           /* left Alt */
#define DIK_CAPSLOCK        DIK_CAPITAL         /* CapsLock */
#define DIK_NUMPADMINUS     DIK_SUBTRACT        /* - on numeric keypad */
#define DIK_NUMPADPLUS      DIK_ADD             /* + on numeric keypad */
#define DIK_NUMPADPERIOD    DIK_DECIMAL         /* . on numeric keypad */
#define DIK_NUMPADSLASH     DIK_DIVIDE          /* / on numeric keypad */
#define DIK_RALT            DIK_RMENU           /* right Alt */
#define DIK_UPARROW         DIK_UP              /* UpArrow on arrow keypad */
#define DIK_PGUP            DIK_PRIOR           /* PgUp on arrow keypad */
#define DIK_LEFTARROW       DIK_LEFT            /* LeftArrow on arrow keypad */
#define DIK_RIGHTARROW      DIK_RIGHT           /* RightArrow on arrow keypad */
#define DIK_DOWNARROW       DIK_DOWN            /* DownArrow on arrow keypad */
#define DIK_PGDN            DIK_NEXT            /* PgDn on arrow keypad */

/*
 *  Alternate names for keys originally not used on US keyboards.
 */
#define DIK_CIRCUMFLEX      DIK_PREVTRACK       /* Japanese keyboard */

#endif /* DIJ_RINGZERO */

+ Code Snippet

/****************************************************************************
 *
 *      DirectInput keyboard scan codes
 *
 ****************************************************************************/
#define DIK_ESCAPE          0x01
#define DIK_1               0x02
#define DIK_2               0x03
#define DIK_3               0x04
#define DIK_4               0x05
#define DIK_5               0x06
#define DIK_6               0x07
#define DIK_7               0x08
#define DIK_8               0x09
#define DIK_9               0x0A
#define DIK_0               0x0B
#define DIK_MINUS           0x0C    /* - on main keyboard */
#define DIK_EQUALS          0x0D
#define DIK_BACK            0x0E    /* backspace */
#define DIK_TAB             0x0F
#define DIK_Q               0x10
#define DIK_W               0x11
#define DIK_E               0x12
#define DIK_R               0x13
#define DIK_T               0x14
#define DIK_Y               0x15
#define DIK_U               0x16
#define DIK_I               0x17
#define DIK_O               0x18
#define DIK_P               0x19
#define DIK_LBRACKET        0x1A
#define DIK_RBRACKET        0x1B
#define DIK_RETURN          0x1C    /* Enter on main keyboard */
#define DIK_LCONTROL        0x1D
#define DIK_A               0x1E
#define DIK_S               0x1F
#define DIK_D               0x20
#define DIK_F               0x21
#define DIK_G               0x22
#define DIK_H               0x23
#define DIK_J               0x24
#define DIK_K               0x25
#define DIK_L               0x26
#define DIK_SEMICOLON       0x27
#define DIK_APOSTROPHE      0x28
#define DIK_GRAVE           0x29    /* accent grave */
#define DIK_LSHIFT          0x2A
#define DIK_BACKSLASH       0x2B
#define DIK_Z               0x2C
#define DIK_X               0x2D
#define DIK_C               0x2E
#define DIK_V               0x2F
#define DIK_B               0x30
#define DIK_N               0x31
#define DIK_M               0x32
#define DIK_COMMA           0x33
#define DIK_PERIOD          0x34    /* . on main keyboard */
#define DIK_SLASH           0x35    /* / on main keyboard */
#define DIK_RSHIFT          0x36
#define DIK_MULTIPLY        0x37    /* * on numeric keypad */
#define DIK_LMENU           0x38    /* left Alt */
#define DIK_SPACE           0x39
#define DIK_CAPITAL         0x3A
#define DIK_F1              0x3B
#define DIK_F2              0x3C
#define DIK_F3              0x3D
#define DIK_F4              0x3E
#define DIK_F5              0x3F
#define DIK_F6              0x40
#define DIK_F7              0x41
#define DIK_F8              0x42
#define DIK_F9              0x43
#define DIK_F10             0x44
#define DIK_NUMLOCK         0x45
#define DIK_SCROLL          0x46    /* Scroll Lock */
#define DIK_NUMPAD7         0x47
#define DIK_NUMPAD8         0x48
#define DIK_NUMPAD9         0x49
#define DIK_SUBTRACT        0x4A    /* - on numeric keypad */
#define DIK_NUMPAD4         0x4B
#define DIK_NUMPAD5         0x4C
#define DIK_NUMPAD6         0x4D
#define DIK_ADD             0x4E    /* + on numeric keypad */
#define DIK_NUMPAD1         0x4F
#define DIK_NUMPAD2         0x50
#define DIK_NUMPAD3         0x51
#define DIK_NUMPAD0         0x52
#define DIK_DECIMAL         0x53    /* . on numeric keypad */
#define DIK_OEM_102         0x56    /* <> or \| on RT 102-key keyboard (Non-U.S.) */
#define DIK_F11             0x57
#define DIK_F12             0x58
#define DIK_F13             0x64    /*                     (NEC PC98) */
#define DIK_F14             0x65    /*                     (NEC PC98) */
#define DIK_F15             0x66    /*                     (NEC PC98) */
#define DIK_KANA            0x70    /* (Japanese keyboard)            */
#define DIK_ABNT_C1         0x73    /* /? on Brazilian keyboard */
#define DIK_CONVERT         0x79    /* (Japanese keyboard)            */
#define DIK_NOCONVERT       0x7B    /* (Japanese keyboard)            */
#define DIK_YEN             0x7D    /* (Japanese keyboard)            */
#define DIK_ABNT_C2         0x7E    /* Numpad . on Brazilian keyboard */
#define DIK_NUMPADEQUALS    0x8D    /* = on numeric keypad (NEC PC98) */
#define DIK_PREVTRACK       0x90    /* Previous Track (DIK_CIRCUMFLEX on Japanese keyboard) */
#define DIK_AT              0x91    /*                     (NEC PC98) */
#define DIK_COLON           0x92    /*                     (NEC PC98) */
#define DIK_UNDERLINE       0x93    /*                     (NEC PC98) */
#define DIK_KANJI           0x94    /* (Japanese keyboard)            */
#define DIK_STOP            0x95    /*                     (NEC PC98) */
#define DIK_AX              0x96    /*                     (Japan AX) */
#define DIK_UNLABELED       0x97    /*                        (J3100) */
#define DIK_NEXTTRACK       0x99    /* Next Track */
#define DIK_NUMPADENTER     0x9C    /* Enter on numeric keypad */
#define DIK_RCONTROL        0x9D
#define DIK_MUTE            0xA0    /* Mute */
#define DIK_CALCULATOR      0xA1    /* Calculator */
#define DIK_PLAYPAUSE       0xA2    /* Play / Pause */
#define DIK_MEDIASTOP       0xA4    /* Media Stop */
#define DIK_VOLUMEDOWN      0xAE    /* Volume - */
#define DIK_VOLUMEUP        0xB0    /* Volume + */
#define DIK_WEBHOME         0xB2    /* Web home */
#define DIK_NUMPADCOMMA     0xB3    /* , on numeric keypad (NEC PC98) */
#define DIK_DIVIDE          0xB5    /* / on numeric keypad */
#define DIK_SYSRQ           0xB7
#define DIK_RMENU           0xB8    /* right Alt */
#define DIK_PAUSE           0xC5    /* Pause */
#define DIK_HOME            0xC7    /* Home on arrow keypad */
#define DIK_UP              0xC8    /* UpArrow on arrow keypad */
#define DIK_PRIOR           0xC9    /* PgUp on arrow keypad */
#define DIK_LEFT            0xCB    /* LeftArrow on arrow keypad */
#define DIK_RIGHT           0xCD    /* RightArrow on arrow keypad */
#define DIK_END             0xCF    /* End on arrow keypad */
#define DIK_DOWN            0xD0    /* DownArrow on arrow keypad */
#define DIK_NEXT            0xD1    /* PgDn on arrow keypad */
#define DIK_INSERT          0xD2    /* Insert on arrow keypad */
#define DIK_DELETE          0xD3    /* Delete on arrow keypad */
#define DIK_LWIN            0xDB    /* Left Windows key */
#define DIK_RWIN            0xDC    /* Right Windows key */
#define DIK_APPS            0xDD    /* AppMenu key */
#define DIK_POWER           0xDE    /* System Power */
#define DIK_SLEEP           0xDF    /* System Sleep */
#define DIK_WAKE            0xE3    /* System Wake */
#define DIK_WEBSEARCH       0xE5    /* Web Search */
#define DIK_WEBFAVORITES    0xE6    /* Web Favorites */
#define DIK_WEBREFRESH      0xE7    /* Web Refresh */
#define DIK_WEBSTOP         0xE8    /* Web Stop */
#define DIK_WEBFORWARD      0xE9    /* Web Forward */
#define DIK_WEBBACK         0xEA    /* Web Back */
#define DIK_MYCOMPUTER      0xEB    /* My Computer */
#define DIK_MAIL            0xEC    /* Mail */
#define DIK_MEDIASELECT     0xED    /* Media Select */

/*
 *  Alternate names for keys, to facilitate transition from DOS.
 */
#define DIK_BACKSPACE       DIK_BACK            /* backspace */
#define DIK_NUMPADSTAR      DIK_MULTIPLY        /* * on numeric keypad */
#define DIK_LALT            DIK_LMENU           /* left Alt */
#define DIK_CAPSLOCK        DIK_CAPITAL         /* CapsLock */
#define DIK_NUMPADMINUS     DIK_SUBTRACT        /* - on numeric keypad */
#define DIK_NUMPADPLUS      DIK_ADD             /* + on numeric keypad */
#define DIK_NUMPADPERIOD    DIK_DECIMAL         /* . on numeric keypad */
#define DIK_NUMPADSLASH     DIK_DIVIDE          /* / on numeric keypad */
#define DIK_RALT            DIK_RMENU           /* right Alt */
#define DIK_UPARROW         DIK_UP              /* UpArrow on arrow keypad */
#define DIK_PGUP            DIK_PRIOR           /* PgUp on arrow keypad */
#define DIK_LEFTARROW       DIK_LEFT            /* LeftArrow on arrow keypad */
#define DIK_RIGHTARROW      DIK_RIGHT           /* RightArrow on arrow keypad */
#define DIK_DOWNARROW       DIK_DOWN            /* DownArrow on arrow keypad */
#define DIK_PGDN            DIK_NEXT            /* PgDn on arrow keypad */

/*
 *  Alternate names for keys originally not used on US keyboards.
 */
#define DIK_CIRCUMFLEX      DIK_PREVTRACK       /* Japanese keyboard */

#endif /* DIJ_RINGZERO */

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Lilith

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Location: Dallas, TX

Posted: 20th Aug 2009 05:39

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Try this just for brevity. I don't know that it would be any faster

bool Input::isKeyDown(int scanCode)
{
return (dbKeyState(scanCode) != 0)
}

Lilith, Night Butterfly
I'm not a programmer but I play one in the office

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DarkwingDuck

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Joined: 5th Oct 2009

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Posted: 14th Oct 2009 22:06

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I'm having problems with my keyboard commands.

for instance:
if ( dbUpKey ( ) )
dbMoveCamera ( 1 );

// move the camera backwards
if ( dbDownKey ( ) )
dbMoveCamera ( -1 );
// move camera left
if ( dbLeftKey ( ) )
dbMoveCamera ( ? );

how do i make the camera go left? if i put a 1 or a -1 where the question mark is, all it does is move forward.

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DnB

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Joined: 28th Feb 2009

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Posted: 15th Oct 2009 02:16

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You have to use dbTurnCameraLeft & dbTurnCameraRight commands

+ Code Snippet


if ( dbLeftKey ( ) )
{
	dbTurnCameraLeft ( 1 );
}

else if ( dbRightKey ( ) )
{
	dbTurnCameraRight ( 1 );
}

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Dark GDK / Keyboard Input