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// Jason Rohrer
// getKey.h
/**
*
* general interface for getting current key depressed
* Implemented by a graphix framework on a particular platform
*
*
* Created 12-15-99
* Mods:
*
*/
// returns true if key represented by given key code is down
char getKeyDown( int vKeyCode );
// returns true if key is up
char getKeyUp( int vKeyCode );
/**
Sample PC implementation
#include <windows.h>
getKeyDown( int vKeyCode ) {
return ((GetAsyncKeyState(vKeyCode) & 0x8000) ? true : false);
}
getKeyUp( int vKeyCode ) {
return ((GetAsyncKeyState(vKeyCode) & 0x8000) ? false : true);
}
Sample Mac implementation
#include <Events.h>
getKeyDown( int vKeyCode ) {
KeyMapByteArray keyArray;
GetKeys( keyArray );
int arrayInd = vKeyCode >> 3; // divide by 8 to get start array index of key code
unsigned char neededByte = keyArray[ arrayInd ];
return (neededByte >> vKeyCode % 8) && 0x01; // trim off bit needed
}
getKeyUp( int vKeyCode ) {
KeyMapByteArray keyArray;
GetKeys( keyArray );
int arrayInd = vKeyCode >> 3; // divide by 8 to get start array index of key code
unsigned char neededByte = keyArray[ arrayInd ];
return !((neededByte >> vKeyCode % 8) && 0x01); // trim off bit needed, and invert
}
*/
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